Chemical Engineering Research & Design最新文献_第5页

Economic and environmental assessment of methanol production from captured CO₂ using green hydrogen 利用绿色氢从捕获的二氧化碳中生产甲醇的经济和环境评价

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-09-01 Epub Date: 2026-08-20 DOI: 10.1016/j.cherd.2026.08.029

Neelam Ramzan, Mujahid Ur Rehman, Muhammad Adnan, Azhar ul Haq, Atta Ullah, Muhammad Rizwan, Aubaid Ulllah, Afsin Gungor, Muhammad Zaman

{"title":"Economic and environmental assessment of methanol production from captured CO₂ using green hydrogen","authors":"Neelam Ramzan, Mujahid Ur Rehman, Muhammad Adnan, Azhar ul Haq, Atta Ullah, Muhammad Rizwan, Aubaid Ulllah, Afsin Gungor, Muhammad Zaman","doi":"10.1016/j.cherd.2026.08.029","DOIUrl":"10.1016/j.cherd.2026.08.029","url":null,"abstract":"<div><div>This study evaluates an integrated system for pre-combustion CO<sub>2</sub> capture and methanol synthesis designed to overcome the economic barriers of conventional carbon management. The system combines a dual-stage Selexol process (DSSP) for CO<sub>2</sub> capture from gasification plants with a high-temperature solid oxide electrolyzer (SOE) for renewable hydrogen production, enabling catalytic conversion of CO<sub>2</sub> to methanol. Simulations in Aspen HYSYS® demonstrate that integration eliminates external heating demands for the DSSP and reduces SOE energy consumption, lowering operational costs. Methanol is produced at €530/tonne, yielding a €40/tonne profit (excluding carbon tax incentives). The system’s economic viability depends on renewable electricity pricing, methanol market trends, and carbon tax policies. By relying solely on renewable energy, it achieves a net CO<sub>2</sub> reduction of 2.12 tonnes per tonne of methanol, leveraging synergies between capture and utilization. Aligned with Sustainable Development Goal 13 (Climate Action), this approach presents a scalable and economically viable pathway for emission reductions, emphasizing the necessity of policy support, affordable renewables, and sustainable innovation to advance CO<sub>2</sub> utilization in the power sector.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"233 ","pages":"Pages 633-648"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148845756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A geometry-informed pressure drop model for corrugated structured packing towers 波纹结构填料塔的几何通知压降模型

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-09-01 Epub Date: 2026-08-22 DOI: 10.1016/j.cherd.2026.08.034

Rulin Xiong, Peng Yan, Hong Li, Liyan Liu, Zhenming Yang, Xin Gao

{"title":"A geometry-informed pressure drop model for corrugated structured packing towers","authors":"Rulin Xiong, Peng Yan, Hong Li, Liyan Liu, Zhenming Yang, Xin Gao","doi":"10.1016/j.cherd.2026.08.034","DOIUrl":"10.1016/j.cherd.2026.08.034","url":null,"abstract":"<div><div>The hydrodynamic performance of structured packings is fundamental to the design and scale-up of mass transfer equipment. Existing physical models — such as those of Billet–Schultes, Stichlmair, Olujić, Rocha–Bravo–Fair, and others — can predict pressure drop for structured packings, but they often rely on simplified geometric parameters (e.g., hydraulic diameter) and require case-specific empirical constants or extensive calibration. Moreover, they do not explicitly account for the intrinsic geometric features of the corrugated sheets — such as wave height, pitch, and open area ratio — which limits their generalizability across different packing geometries. In this study, high-resolution computational fluid dynamics (CFD) simulations are first performed for three corrugated packings with distinct geometries to obtain accurate single-phase pressure-drop data and flow field information. Based on the CFD simulation results, the viscous resistance coefficient and inertial resistance coefficient of each packing were extracted. Then, two geometric analogy models, the square-pyramid model and the representative elementary unit (REU) model were proposed. The equivalent particle diameter <span><math><msub><mrow><mi>d</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span> is defined by embedding the structural parameters of the corrugated plate (wave height, pitch, porosity, opening area ratio) into the Ergun equation. At the same time, the geometry-dependent shape correction factor <em>k</em> is introduced and calibrated using CFD data to account for the difference between triangular and sinusoidal corrugations. Finally, the low-mesh-resolution porous medium model was verified by the experimental data of three industrial packings (Mellapak 250Y, Montzpak B1–250Y, Flexipac 1Y). The results showed that the average relative prediction error of the model was about 10% and 20% respectively for triangular and sinusoidal corrugated packings.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"233 ","pages":"Pages 715-729"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148845753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low-pressure gas carburizing optimization to reduce of PAH and VOC generation 低压气体渗碳优化，减少多环芳烃和VOC的产生

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-08-01 Epub Date: 2026-07-15 DOI: 10.1016/j.cherd.2026.07.029

Hubert Monnier, Fatima Matamoros Marin, David Maréchal, Julien Valette, Mathieu Marchal, Juliette Kunz-Iffli, Maria-Rita Chini

{"title":"Low-pressure gas carburizing optimization to reduce of PAH and VOC generation","authors":"Hubert Monnier, Fatima Matamoros Marin, David Maréchal, Julien Valette, Mathieu Marchal, Juliette Kunz-Iffli, Maria-Rita Chini","doi":"10.1016/j.cherd.2026.07.029","DOIUrl":"10.1016/j.cherd.2026.07.029","url":null,"abstract":"<div><div>Low-pressure gas carburizing is a heat-treatment technique that enriches the surface of metallic parts with carbon. The process, however, can generate exposure and environmental hazards due to emissions of polycyclic aromatic hydrocarbons, some of which are classified as carcinogenic. Occupational exposure measurement campaigns conducted in industrial companies demonstrated that some professional activities such as furnace maintenance and cleaning exposed workers to chemical hazards. To reduce the formation of these compounds, a consortium resulting from a partnership between INRS and academic institutions suggested modifications to the operational protocols used in industry. To achieve this, the consortium modelled the entire process, and optimized protocols were developed. The results obtained on an industrial pilot under these new operational conditions validated the methodology. The proposed solutions allowed for a reduction in the quantity of acetylene used (-44%), leading to a decrease in the amount of polycyclic aromatic hydrocarbons generated (-44%) and volatile organic compounds (-85%), while maintaining the quality of the carburized parts.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"232 ","pages":"Pages 604-618"},"PeriodicalIF":4.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148636979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determining the maximum-efficiency cylinder diameter of a cyclone by analyzing particle escape pathways in the upward flow 通过分析颗粒在向上流动中的逃逸路径，确定旋风分离器的最大效率圆筒直径

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-08-01 Epub Date: 2026-07-28 DOI: 10.1016/j.cherd.2026.07.060

Shiqian Gao, Jingxuan Yang, Xiaogang Hao, Guo Xu, Chengao Zhang

{"title":"Determining the maximum-efficiency cylinder diameter of a cyclone by analyzing particle escape pathways in the upward flow","authors":"Shiqian Gao, Jingxuan Yang, Xiaogang Hao, Guo Xu, Chengao Zhang","doi":"10.1016/j.cherd.2026.07.060","DOIUrl":"10.1016/j.cherd.2026.07.060","url":null,"abstract":"<div><div>The cylinder diameter is a key parameter in cyclone structural optimization, yet research findings on its impact on separation performance remain inconsistent. Additionally, there is a lack of detailed flow field analysis. This study systematically investigates the effects and underlying mechanisms of increasing cylinder diameter on separation performance through a combination of experiments, CFD simulations, and theoretical analysis. Experiments show that separation efficiency first increases and then decreases with increasing cylinder diameter, reaching a maximum at 410 mm. Furthermore, neither particle concentration nor particle size affects the diameter at which maximum efficiency occurs. Theoretical analysis indicates that classical models such as the “equilibrium orbit” and “residence time” models cannot fully explain this efficiency transition. CFD analysis showed that increasing the cylinder diameter expands the separation space and enhances the “secondary separation effect,” beneficial for particle capture. However, it also intensifies the development of local secondary vortices near the exhaust pipe outlet, forming an “anti-secondary separation effect.” This results in more particles being carried away by the upward flow and escaping via the “throttling effect”, thereby reducing efficiency.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"232 ","pages":"Pages 845-857"},"PeriodicalIF":4.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148636983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Applying bronzite mineral as a novel and effective magnetic catalyst for photo-Fenton reaction: Experimental design and machine learning 应用青铜矿作为光-芬顿反应的新型有效磁性催化剂：实验设计和机器学习

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-08-01 Epub Date: 2026-07-21 DOI: 10.1016/j.cherd.2026.07.048

Dison Stracke Pfingsten Franco, Vitor Martins Pereira Blois, Matheus Londero da Costa, Wagner Jesus da Silva Garcia, Lúcio Strazzabosco Dorneles, Edson Luiz Foletto, Jivago Schumacher de Oliveira

{"title":"Applying bronzite mineral as a novel and effective magnetic catalyst for photo-Fenton reaction: Experimental design and machine learning","authors":"Dison Stracke Pfingsten Franco, Vitor Martins Pereira Blois, Matheus Londero da Costa, Wagner Jesus da Silva Garcia, Lúcio Strazzabosco Dorneles, Edson Luiz Foletto, Jivago Schumacher de Oliveira","doi":"10.1016/j.cherd.2026.07.048","DOIUrl":"10.1016/j.cherd.2026.07.048","url":null,"abstract":"<div><div>This study investigates bronzite, an iron-rich orthopyroxene mineral, as a natural and cost-effective catalyst for the photo-Fenton degradation of amaranth dye in water. Bronzite powder's high Fe content, visible-light absorption (band gap of 2.48 eV), and magnetic recoverability were confirmed by XRD, FTIR, SEM/EDS, BET, DRS, and magnetic analysis. The optimal conditions for attaining 98.3% dye degradation and 64% TOC removal under visible-light irradiation were found to be pH 3, catalyst dosage of 1 g L⁻¹ , and 100 µg L⁻¹ H₂O₂ using a central composite rotational design (CCRD). Photogenerated holes (h⁺) are the predominant reactive species, whereas •OH and e⁻ have minor contributions, according to scavenger tests. The degradation profiles under various operating circumstances were accurately represented (R<sup>2</sup>>0.95) by a kinetic model linking adsorption–desorption and surface oxidation. Reaction intermediates were successfully predicted by machine learning (Random Forest), which supported a degradation route that began with azo bond cleavage and progressively oxidized aromatic fragments. Over the course of five reuse cycles, the catalyst remained highly active and showed no discernible ecotoxicity to Artemia salina. These findings show that bronzite is a stable, reusable, and eco-friendly natural catalyst with potential use in the photo-Fenton treatment of wastewater tainted with dyes.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"232 ","pages":"Pages 627-640"},"PeriodicalIF":4.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148658229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The co-production of hydrogen and carbon nanotubes from the gasification of waste tyres and waste biomass – Part I: Conceptual design 从废轮胎和废生物质气化中联合生产氢和碳纳米管-第一部分：概念设计

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-08-01 Epub Date: 2026-07-10 DOI: 10.1016/j.cherd.2026.07.017

Lanrewaju I. Fajimi, Bilainu O. Oboirien, Thomas A. Adams II

{"title":"The co-production of hydrogen and carbon nanotubes from the gasification of waste tyres and waste biomass – Part I: Conceptual design","authors":"Lanrewaju I. Fajimi, Bilainu O. Oboirien, Thomas A. Adams II","doi":"10.1016/j.cherd.2026.07.017","DOIUrl":"10.1016/j.cherd.2026.07.017","url":null,"abstract":"<div><div>In this study, a conceptual production plant design of the co-production of hydrogen and CNT from waste tyres (WT) and waste biomass (WB) gasification was investigated. Key design elements, including feedstock preparation, gasification reactor configuration, and product separation techniques, were explored. The overall process comprises key units which include: the gasification unit, desulphurization units, WGS unit, PSA unit, and CNT synthesis unit. To achieve the objective of this study, five design cases were investigated using different WT:WB ratios. The first and last cases considered 100% gasification using WT and WB, respectively. The second, third, and fourth cases were the co-gasification scenarios, which investigated 75:25, 50:50, and 25:75 WT:WB ratios, respectively. The results from the technical analysis show that the first two cases (1 and 2) had the highest product-to-feed ratios for the gasification and co-gasification scenarios. The hydrogen and CNT yields from these cases were 0.198 kg<sub>H₂</sub>/kg<sub>Feed</sub> & 0.154 kg<sub>H₂</sub>/kg<sub>Feed</sub> and 0.111 kg<sub>CNT</sub>/kg<sub>Feed</sub>, & 0.105 kg<sub>CNT</sub>/kg<sub>Feed,</sub> respectively. In addition, the carbon conversion efficiency (CCE) decreased from 98.0% to 92.3% across Cases 1–5, while the hydrogen conversion efficiency (HCE) declined significantly from 85.4% to 22.8%. To further test the other technical aspects of each case, an energy assessment of the process was carried out. In addition, the overall energy efficiencies were 43.2%<sub>LHV</sub>, 38.5%<sub>LHV</sub>, 32.5%<sub>LHV</sub>, 29.7%<sub>LHV</sub>, and 24.2%<sub>LHV,</sub> respectively.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"232 ","pages":"Pages 499-514"},"PeriodicalIF":4.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148658219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combining experiments and CFD-based compartment models for the scale-up of counter-current solid-liquid extraction 结合实验和基于cfd的隔室模型进行逆流固液萃取放大

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-08-01 Epub Date: 2026-07-18 DOI: 10.1016/j.cherd.2026.07.041

Sebastian Schwarz, Annemarie Lehr, Gábor Janiga, Dominique Thévenin, Marcus Grünewald

{"title":"Combining experiments and CFD-based compartment models for the scale-up of counter-current solid-liquid extraction","authors":"Sebastian Schwarz, Annemarie Lehr, Gábor Janiga, Dominique Thévenin, Marcus Grünewald","doi":"10.1016/j.cherd.2026.07.041","DOIUrl":"10.1016/j.cherd.2026.07.041","url":null,"abstract":"<div><div>Continuous counter-current solid-liquid extraction is a promising approach for the recovery of natural products, particularly when target compounds are present at low concentrations in the solid phase. However, reliable process design and scale-up remain challenging due to complex hydrodynamics and limitations of simplified modeling approaches. In this work, a combined experimental, CFD-based (using Computational Fluid Dynamics), and compartment modeling strategy is developed for an extruder-based extraction process for the recovery of artemisinin from <em>Artemisia annua L</em>. Residence time experiments performed with water in a transparent laboratory extruder are used to characterize the hydrodynamic behavior and to provide input data for simplified CFD-simulations without mass transfer. From these simulations, phase volumes and inter-compartment flows are derived and used to parameterize a compartment model. By incorporating mass transfer between extract and raffinate, the model reproduces the residence time distribution of the extract phase with excellent agreement, although these data were not used for parameterization. The approach is subsequently transferred to a toluene-based extraction system and scaled up to a larger apparatus by numbering-up the compartments. While a previously proposed short-cut model reproduces experimental extraction yields with high accuracy, it relies on simplified assumptions. The CFD-informed compartment model provides a more physically consistent description, resulting in slightly more conservative predictions but correctly capturing trends across operating conditions, with deviations below 19%. The results demonstrate that combining experiments, CFD-simulations, and compartment modeling enables a robust and physically interpretable framework for the design and scale-up of counter-current extraction processes.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"232 ","pages":"Pages 732-743"},"PeriodicalIF":4.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148658220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CFD-driven optimization of baffle-induced flow patterns in a jet impact-negative pressure reactor 射流冲击负压反应器中挡板流型的cfd驱动优化

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-08-01 Epub Date: 2026-07-19 DOI: 10.1016/j.cherd.2026.07.043

Xinyue Liao, Ping Xu, Lingxing Hu, Facheng Qiu, Zhongjun Li, Lanfeng Guo, Dong Hu

{"title":"CFD-driven optimization of baffle-induced flow patterns in a jet impact-negative pressure reactor","authors":"Xinyue Liao, Ping Xu, Lingxing Hu, Facheng Qiu, Zhongjun Li, Lanfeng Guo, Dong Hu","doi":"10.1016/j.cherd.2026.07.043","DOIUrl":"10.1016/j.cherd.2026.07.043","url":null,"abstract":"<div><div>The jet impact-negative pressure reactor (JI-NPR) is an efficient gas-liquid mixing and reaction intensification equipment. However, fine droplets and residual air are easily entrained in its negative-pressure separation zone during operation, posing corrosion risks to downstream equipment. To address this issue, this study proposes the introduction of a perforated baffle in the negative-pressure separation zone to enhance gas-liquid separation. Computational fluid dynamics (CFD) was employed to systematically investigate the influence mechanism of baffle installation height (200–700 mm) on the internal flow field characteristics and separation performance of the reactor. The results show that baffle height significantly affects liquid phase distribution uniformity, pressure gradient, and energy dissipation by modifying the vortex structure and flow cross-section. A unique dual-vortex composite structure was formed in the flow field at a baffle height of 400 mm, which resulted in a uniform distribution of the liquid phase volume fraction within the range of 0.300–0.400, reduced the secondary phase variation coefficient to 0.26, and maintained a moderate pressure gradient with minimal velocity fluctuations. This flow structure effectively promoted gas-liquid distribution uniformity and significantly reduced the risk of droplet entrainment. This study reveals the regulation mechanism of baffle height in the coupled flow field of JI-NPR and identifies the recommended design parameter (400 mm) within the studied range. The findings provide a theoretical basis and optimization strategy for the high-performance design and corrosion protection of JI-NPR.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"232 ","pages":"Pages 641-653"},"PeriodicalIF":4.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148658228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green synthesis of low silica PHI molecular sieve micron rods assisted by β-cyclodextrin and their enhanced Cs+ adsorption performance β-环糊精辅助下绿色合成低硅PHI分子筛微棒及其增强的Cs+吸附性能

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-08-01 Epub Date: 2026-07-18 DOI: 10.1016/j.cherd.2026.07.032

Xiufang Qi, Chaofan Lin, Kaiyu He, Yuhang Li, Chunyao Song, Jiahao Wu, Manling Wu, Bo Yang, Cheng Liu

{"title":"Green synthesis of low silica PHI molecular sieve micron rods assisted by β-cyclodextrin and their enhanced Cs+ adsorption performance","authors":"Xiufang Qi, Chaofan Lin, Kaiyu He, Yuhang Li, Chunyao Song, Jiahao Wu, Manling Wu, Bo Yang, Cheng Liu","doi":"10.1016/j.cherd.2026.07.032","DOIUrl":"10.1016/j.cherd.2026.07.032","url":null,"abstract":"<div><div>Radioactive wastewater containing <sup>137</sup>Cs poses a serious threat to the environment and human health. However, traditional treatment methods exhibit low efficiency and are prone to secondary pollution. This study synthesized micron-scale PHI-typed molecular sieves with high <sup>137</sup>Cs<sup>+</sup> adsorption capacity using an environmentally friendly hydrothermal method and β-cyclodextrin as a crystallization assistant. Structure and morphology of the products were characterized using PXRD, IR, TG, XPS, and SEM- techniques, while adsorption experiments conducted to evaluate their <sup>137</sup>Cs<sup>+</sup> adsorption performance. The results demonstrated that rod-shaped PHI-typed molecular sieves were prepared with layered structures, exhibiting particle sizes ranging from 14 ∼ 20μm and a low Si/Al molar ratio of 2.25. Adsorption experiments results showed that the prepared molecular sieve exhibited Cs<sup>+</sup> adsorption behavior consistent with quasi-second-order kinetics and the Langmuir isothermal model, with a maximum adsorption capacity of 415.79 mg/g and stability maintained within the temperature range of 298∼338 K. In a competitive system containing K<sup>+</sup>, Na<sup>+</sup>, Mg<sup>2+</sup>, and Sr<sup>2+</sup> (each at 100 mg/L), the Cs<sup>+</sup> removal efficiency remained above 70%, while also demonstrating adsorption capacity for Sr<sup>2+</sup> of 31.96 mg/g. This work contributes to advancing sustainable green synthesis methodologies for PHI molecular sieves materials with high efficiency in removing radioactive Cs<sup>+</sup>, demonstrating significant application potential in the field of nuclear wastewater treatment.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"232 ","pages":"Pages 698-705"},"PeriodicalIF":4.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148658226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comprehensive review of carbon monoxide capture, challenges, and possible solutions 一氧化碳捕获，挑战和可能的解决方案的全面审查

IF 4 3区工程技术

Chemical Engineering Research & Design Pub Date : 2026-08-01 Epub Date: 2026-07-16 DOI: 10.1016/j.cherd.2026.07.039

M.R. Islam, L. Arndt, S. Toan, R. Davis, W. Xie

{"title":"A comprehensive review of carbon monoxide capture, challenges, and possible solutions","authors":"M.R. Islam, L. Arndt, S. Toan, R. Davis, W. Xie","doi":"10.1016/j.cherd.2026.07.039","DOIUrl":"10.1016/j.cherd.2026.07.039","url":null,"abstract":"<div><div>Carbon monoxide (CO) is a critical industrial gas with dual importance as both a valuable feedstock and a toxic pollutant. High-temperature CO capture has recently gained significant attention because many industrial streams containing CO, such as syngas, steelmaking off-gases, and reformate streams, are generated at elevated temperatures, where conventional low-temperature separation methods become energy-intensive or ineffective. Capturing CO directly at high temperatures offers substantial process efficiency by eliminating cooling and reheating steps, yet it presents unique challenges, including weak physisorption, selectivity against chemically similar gases (N₂, H₂, CO₂), thermal instability of the sorbents, high regeneration energy requirements, and vulnerability to impurities such as water vapor and sulfur compounds. This review critically evaluates the state-of-the-art materials and processes designed to overcome these limitations, with particular emphasis on chemisorptive sorbents, high-temperature membranes, and redox-active or chemical-looping sorbents. Emerging strategies such as hybrid processes, site-engineered sorbents, and impurity-resistant supports are highlighted as potential solutions to enhance selectivity, stability, and cyclic performance. Furthermore, the review discusses opportunities for process integration and techno-economic considerations that will determine the industrial feasibility of high-temperature CO capture. Finally, key research gaps and future directions are identified, including the need for long-term cyclic testing, scalable structured sorbents, and pilot-scale demonstrations. By consolidating advances in materials chemistry and process engineering, this review aims to provide a roadmap toward efficient, robust, and scalable high-temperature CO capture technologies that enable both resource recovery and environmental protection.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"232 ","pages":"Pages 452-470"},"PeriodicalIF":4.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148637523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0