Chinese Journal of Chemical Engineering最新文献_第3页

Phase equilibria of ternary system RbCl - polyethylene glycol (PEG6000) - H2O at T = (288.2, 298.2, and 308.2) K: Measurement, correlation, and thermodynamic modeling 三元体系RbCl -聚乙二醇(PEG6000) - H2O在T =(288.2, 298.2和308.2)K时的相平衡：测量，相关性和热力学模型

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-05-01 DOI: 10.1016/j.cjche.2024.12.020

Shan Feng , Maolan Li , Xudong Yu , Lin Wang , Qin Huang

{"title":"Phase equilibria of ternary system RbCl - polyethylene glycol (PEG6000) - H2O at T = (288.2, 298.2, and 308.2) K: Measurement, correlation, and thermodynamic modeling","authors":"Shan Feng , Maolan Li , Xudong Yu , Lin Wang , Qin Huang","doi":"10.1016/j.cjche.2024.12.020","DOIUrl":"10.1016/j.cjche.2024.12.020","url":null,"abstract":"<div><div>The phase equilibria relationship of the system RbCl-PEG6000-H<sub>2</sub>O were investigated at temperatures of 288.2, 298.2, and 308.2 K, the compositions of solid-liquid equilibria(SLE) and liquid-liquid equilibria(LLE) were determined. The complete phase diagrams, binodal curve diagrams, and tie-line diagrams were all plotted. Results show that both solid-liquid equilibria and liquid-liquid equilibria relationships at each studied temperature. The complete phase diagrams at 288.2 K, 298.2 K and 308.2 K consist of six phase regions: unsaturated liquid region (L), two saturated solutions with one solid phase of RbCl (L + S), one saturated liquid phase with two solid phases of PEG6000 and RbCl (2S + L), an aqueous two-phase region (2L), and a region with two liquids and one solid phase of RbCl (2L + S). With the increase in temperature, the layering ability of the aqueous two-phase system increases, and both regions (2L) and (2L + S) increase. The binodal curves were fitted using the nonlinear equations proposed by Mistry, Hu, and Jayapal. Additionally, the tie-line data were correlated with the Othmer-Tobias, Bancroft, Hand, and Bachman equations. The liquid-liquid equilibria at 288.2 K, 298.2 K and 308.2 K were calculated using the NRTL model. The findings confirm that the experimental and calculated values are in close agreement, demonstrating the model’s effectiveness in representing the system’s behavior.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 105-114"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899503","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}

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Preparation of MoO3/γ-Al2O3 sulfur-resistant methanation catalyst with segmented plasma fluidized bed 分段等离子流化床制备MoO3/γ-Al2O3耐硫甲烷化催化剂

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-05-01 DOI: 10.1016/j.cjche.2025.02.014

Baowei Wang, Jiangzhou Kong, Xiaoyan Li

{"title":"Preparation of MoO3/γ-Al2O3 sulfur-resistant methanation catalyst with segmented plasma fluidized bed","authors":"Baowei Wang, Jiangzhou Kong, Xiaoyan Li","doi":"10.1016/j.cjche.2025.02.014","DOIUrl":"10.1016/j.cjche.2025.02.014","url":null,"abstract":"<div><div>In order to solve the shortcomings of MoO<sub>3</sub>/γ-Al<sub>2</sub>O<sub>3</sub> catalyst for sulfur-resistant methanation, a segmented plasma fluidized bed reactor was designed, where plasma discharge zone and the fluidization zone were separated under higher discharge power. At the bed height of 30 mm, the gas velocity of 0.10 m·s<sup>−1</sup> can provide a better fluidization state. The suitable discharge results can be achieved when the input power is 27 W and the discharge interval is 2.0 mm. With the extension of catalyst plasma treatment time, the conversion of CO decreases, but the selectivity of CH<sub>4</sub> increases. Combined with N<sub>2</sub> physical adsorption-desorption, XRD, TEM, Raman, TGA and TPR characterization, it was found that the active components of the catalyst are uniformly dispersed on the γ-Al<sub>2</sub>O<sub>3</sub> support. After plasma treatment, tetrahedral Mo species was used as the active center, and the interaction between Mo and the carrier was strengthened. It provides a novel approach for preparing catalyst with dielectric barrier discharge (DBD) fluidized bed reactor.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 142-150"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899506","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

Novel lubricant additives obtained from biodiesel soot dotted with silver nanoparticles for tribological applications 从生物柴油烟尘中获得的新型润滑油添加剂点缀着纳米银用于摩擦学应用

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-05-01 DOI: 10.1016/j.cjche.2024.12.026

Chuan Li , Jiaao Qi , Xiaodong Wang , Xiaoyong Xu , Enzhu Hu , Qiangqiang Zhang , Bo Wu , Xu Tan , Kunhong Hu , Xianguo Hu

{"title":"Novel lubricant additives obtained from biodiesel soot dotted with silver nanoparticles for tribological applications","authors":"Chuan Li , Jiaao Qi , Xiaodong Wang , Xiaoyong Xu , Enzhu Hu , Qiangqiang Zhang , Bo Wu , Xu Tan , Kunhong Hu , Xianguo Hu","doi":"10.1016/j.cjche.2024.12.026","DOIUrl":"10.1016/j.cjche.2024.12.026","url":null,"abstract":"<div><div>In the quest to develop high-performance lubrication additives, a novel nanocomposite comprising biodiesel soot modified by silver (Ag/BDS) was synthesized. The tribological behavior of Ag/BDS nanocomposite as an additive for liquid paraffin (LP) were systematically investigated using response surface methodology. To elucidate the friction and wear mechanisms associated with the Ag/BDS nanocomposite, various analytical techniques were employed, including scanning electron microscopy with energy-dispersive spectroscopy (SEM/EDS), Raman spectroscopy, and molecular dynamics simulations. The results show that the concentration of Ag/BDS has a significant impact on the tribological properties of LP under different applied loads and sliding speeds. Notably, LP containing 0.25% Ag/BDS shows the most favorable tribological performance and in comparison, to pure LP, the average friction coefficient and average wear volume have been reduced by 42.7% and 21.2%, respectively. The mechanisms underlying the reduction in friction and anti-wear mechanism of Ag/BDS have been attributed to the excellent synergies of Ag and BDS. Specifically, the Ag particles facilitate the incorporation of BDS particles in the formation of uniform boundary lubrication films.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 277-291"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948133","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

Engineering hydrophilicity of graphene oxide membranes via poly(ionic liquid)s intercalation for efficient anion separation 通过多离子液体嵌入氧化石墨烯膜实现高效阴离子分离的工程亲水性

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-05-01 DOI: 10.1016/j.cjche.2025.02.015

Rui Jia, Xingyun Li, Ruonan Tan, Zongliang Wan, Jiu Yang, Ziqiang Hong, Zheng Ji, Suixin Zhang, Jingjing Gu, Cenfeng Fu, Jin Ran

{"title":"Engineering hydrophilicity of graphene oxide membranes via poly(ionic liquid)s intercalation for efficient anion separation","authors":"Rui Jia, Xingyun Li, Ruonan Tan, Zongliang Wan, Jiu Yang, Ziqiang Hong, Zheng Ji, Suixin Zhang, Jingjing Gu, Cenfeng Fu, Jin Ran","doi":"10.1016/j.cjche.2025.02.015","DOIUrl":"10.1016/j.cjche.2025.02.015","url":null,"abstract":"<div><div>Two dimensional (2D) membranes show huge potential for ion sieving applications owing to their regular sub-nanometer channels. How to engineer the channel micro-chemistry to pursue higher ion selectivity while maintaining promising ion transports remains challenging. In this work, we propose building rigidly confined charged 2D graphene oxide (GO) channels and manipulating their hydrophilicity <em>via</em> self-designed poly(ionic liquid)s (PILs) intercalation. The imidazolium cations on the PILs backbone not only stabilize the GO interlayer channels <em>via</em> non-covalent interactions but also create a positively charged environment for attracting anions entering into channels. The hydrophilicity variations of the side chains on the PILs help with realizing the regulation of the channel hydrophilicity. Under the electrodialysis mode, the GO membrane with the strongest hydrophobicity yields an impressive selectivity of 172.2 for Cl<sup>−</sup> and SO<sub>4</sub><sup>2−</sup>, which is 48 times of Neosepta ACS, a commercial membrane specialized for anion separation. This work offers a brand-new route in exploring high-performance ion selective membranes.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 45-56"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891312","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

Mechanism of extracting poorly-caking components from Shenhua long-flame coal using [N4441][Cl] [N4441][Cl]萃取神华长焰煤中差结块组分的机理

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-05-01 DOI: 10.1016/j.cjche.2024.11.026

Shixian Fang, Ying Chen, Yutong Qian, Shulin Wang, Xiangchun Liu, Ping Cui

{"title":"Mechanism of extracting poorly-caking components from Shenhua long-flame coal using [N4441][Cl]","authors":"Shixian Fang, Ying Chen, Yutong Qian, Shulin Wang, Xiangchun Liu, Ping Cui","doi":"10.1016/j.cjche.2024.11.026","DOIUrl":"10.1016/j.cjche.2024.11.026","url":null,"abstract":"<div><div>The effects of different kinds of ionic liquids (ILs) on the caking property of Shenhua long-flame coal (SHLC) were studied. SHLC and its residue after [N<sub>4441</sub>][Cl] treatment under optimum conditions were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TG), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and pyrolysis-gas chromatography and mass-spectrometric analysis (Py-GC/MS). The results showed that the ILs used could extract the poorly-caking components from SHLC, and [N<sub>4441</sub>][Cl] with C<sub>3</sub>H<sub>6</sub>O as a solvent exhibited the best effect among the ILs and solvents used. [N<sub>4441</sub>][Cl] could destroy the H bonds in SHLC, and the structure of the cross-linked macromolecules of SHLC was loosed, leading to the release of the small molecules within the macromolecular framework of SHLC. Additionally, [N<sub>4441</sub>][Cl] could easily penetrate into the interior of the relaxed SHLC and break the weak covalent bonds (<em>e.g.</em>, C‒O bonds) of the macromolecules of SHLC. As a result, aromatic hydrocarbons with 3‒5 rings and aliphatic side chains, which are the precursor of the poorly-caking components, were formed and were then extracted from SHLC by C<sub>3</sub>H<sub>6</sub>O. Consequently, [N<sub>4441</sub>][Cl] treatment could decrease the caking property, thermal ability, and macromolecular size of SHLC.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 57-63"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894479","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 systematic data-driven modelling framework for nonlinear distillation processes incorporating data intervals clustering and new integrated learning algorithm 结合数据区间聚类和新的集成学习算法的非线性蒸馏过程系统数据驱动建模框架

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-05-01 DOI: 10.1016/j.cjche.2025.02.013

Zhe Wang , Renchu He , Jian Long

{"title":"A systematic data-driven modelling framework for nonlinear distillation processes incorporating data intervals clustering and new integrated learning algorithm","authors":"Zhe Wang , Renchu He , Jian Long","doi":"10.1016/j.cjche.2025.02.013","DOIUrl":"10.1016/j.cjche.2025.02.013","url":null,"abstract":"<div><div>The distillation process is an important chemical process, and the application of data-driven modelling approach has the potential to reduce model complexity compared to mechanistic modelling, thus improving the efficiency of process optimization or monitoring studies. However, the distillation process is highly nonlinear and has multiple uncertainty perturbation intervals, which brings challenges to accurate data-driven modelling of distillation processes. This paper proposes a systematic data-driven modelling framework to solve these problems. Firstly, data segment variance was introduced into the K-means algorithm to form K-means data interval (KMDI) clustering in order to cluster the data into perturbed and steady state intervals for steady-state data extraction. Secondly, maximal information coefficient (MIC) was employed to calculate the nonlinear correlation between variables for removing redundant features. Finally, extreme gradient boosting (XGBoost) was integrated as the basic learner into adaptive boosting (AdaBoost) with the error threshold (ET) set to improve weights update strategy to construct the new integrated learning algorithm, XGBoost-AdaBoost-ET. The superiority of the proposed framework is verified by applying this data-driven modelling framework to a real industrial process of propylene distillation.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"81 ","pages":"Pages 182-199"},"PeriodicalIF":3.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916134","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

Atomic layer deposition ultrathin amorphous TiO2 film in a fluidized bed reactor for improving the weatherability of TiO2 pigment 在流化床反应器中原子层沉积超薄非晶TiO2薄膜，以提高TiO2颜料的耐候性

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-04-23 DOI: 10.1016/j.cjche.2025.02.028

Jing Guo , Bingkang Niu , Meng Chai , Ruirui Li , Zhengyi Chao , Junfang Liu , Chao Zhang , Weizhou Jiao , Guisheng Qi , Youzhi Liu

{"title":"Atomic layer deposition ultrathin amorphous TiO2 film in a fluidized bed reactor for improving the weatherability of TiO2 pigment","authors":"Jing Guo , Bingkang Niu , Meng Chai , Ruirui Li , Zhengyi Chao , Junfang Liu , Chao Zhang , Weizhou Jiao , Guisheng Qi , Youzhi Liu","doi":"10.1016/j.cjche.2025.02.028","DOIUrl":"10.1016/j.cjche.2025.02.028","url":null,"abstract":"<div><div>Normally, a transparent inert film is coated on the surface of TiO<sub>2</sub> particles to enhance the weatherability of the pigment. Liquid-phase coating process is mainly used in industry, which difficult to get really uniform films. This work combining nanoparticle fluidization technology with atomic layer deposition (ALD) technology to achieve precise surface modification of a large number of micro-nano particles. First, we explored the fluidization characteristics of TiO<sub>2</sub> nanoparticles in a home-made atmospheric fluidized bed ALD reactor (FB-ALD) to ensure the uniform fluidization of a large number of nanoparticles. Then TiCl<sub>4</sub> and H<sub>2</sub>O were used as precursors to deposit amorphous TiO<sub>2</sub> films on the surface of TiO<sub>2</sub> nanoparticles at 80 °C under atmospheric pressure, and the growth per cycle was about 0.109 nm per cycle. After 30 ALD cycles, the film thickness was about 3.1 nm, which could almost fully suppress the photocatalytic activity of TiO<sub>2</sub>. Compared with other traditional coating materials, amorphous TiO<sub>2</sub> has higher light refractive index, and realizes the suppression of the photocatalytic activity of TiO<sub>2</sub> without introducing other substances, demonstrating greater application potential in TiO<sub>2</sub> pigment coating field. The process is a gas-phase coating method, which is efficient, no waste water, and easy to scale up. This work shown the excellent property of interface engineering in improving pigment weatherability and can also provide guidance for the nanoparticle surface modification.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"82 ","pages":"Pages 235-245"},"PeriodicalIF":3.7,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167817","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

Laser-enhanced high-magnification telecentric imaging system for multiphase flow monitoring in membrane fouling 膜污染中多相流监测的激光增强高倍率远心成像系统

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-04-19 DOI: 10.1016/j.cjche.2024.12.028

Haohan Xu , Hu Liang , Xin Feng , Weipeng Zhang , Xiaoxia Duan , Jie Chen , Chao Yang

{"title":"Laser-enhanced high-magnification telecentric imaging system for multiphase flow monitoring in membrane fouling","authors":"Haohan Xu , Hu Liang , Xin Feng , Weipeng Zhang , Xiaoxia Duan , Jie Chen , Chao Yang","doi":"10.1016/j.cjche.2024.12.028","DOIUrl":"10.1016/j.cjche.2024.12.028","url":null,"abstract":"<div><div>Membrane fouling is the primary resistance to the continuous production of stirred membrane reactors. This work presents a laser-enhanced high-magnification telecentric imaging system (LEHTIS), which uses a high-magnification telecentric lens and laser-enhanced illumination to invasively capture the motion of particles on the membrane surface or near the membrane. The problems of working distance and particle interference in the stirred membrane reactor are solved to achieve the purpose of <em>in-situ</em> monitoring of membrane fouling. This method is suitable for high flow rates, high solid holdup, and small particle size systems, and the dynamic motion and accumulation of particles are preliminarily analyzed. It shows that the accumulation and desorption of particles on the membrane surface are related to the physical properties of the membrane surface. There is an intermittent rotational movement in the flow field near the membrane, and it tends to stabilize over time. The filtration process can be assessed by monitoring changes in the overall velocity and acceleration of particles near the membrane. The analysis of forces acting on individual particles is compared and validated with the force balance model to correct and accurately apply it to stirred membrane reactors. The development of LEHTIS provides an effective tool for <em>in-situ</em> monitoring of membrane fouling and optimizing the stirred membrane reactors for industrial applications.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"82 ","pages":"Pages 25-38"},"PeriodicalIF":3.7,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123324","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

NO reduction performance of pyrolyzed biomass char: Effects of dechlorination removal pretreatments 热解生物质炭的NO还原性能：脱氯预处理的影响

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-04-01 DOI: 10.1016/j.cjche.2024.10.041

Jing Wang , Xinwei Yang , Ruiping Zhang , Fengling Yang , Frédéric Marias , Fei Wang

{"title":"NO reduction performance of pyrolyzed biomass char: Effects of dechlorination removal pretreatments","authors":"Jing Wang , Xinwei Yang , Ruiping Zhang , Fengling Yang , Frédéric Marias , Fei Wang","doi":"10.1016/j.cjche.2024.10.041","DOIUrl":"10.1016/j.cjche.2024.10.041","url":null,"abstract":"<div><div>In the current era of renewable energy prominence, the wide operational capacity of coal-fired boilers has emerged as crucial for ensuring the sustainability of power plants. However, attaining ultra-low nitrogen oxides (NOx) emissions during periods of low-load operations presents a significant and persistent challenge for coal power enterprises. While techniques such as biomass re-burning and advanced re-burning have shown promise in enhancing NO reduction efficiency above 800 °C, their elevated levels of chlorine (Cl) and alkali metals pose potential risks to boiler equipment integrity. Therefore, this study proposes the utilization of biomass char derived from pyrolysis as a dual-purpose solution to enhance NO reduction efficiency while safeguarding boiler integrity during low-load operations. Findings indicate that pyrolysis treatment effectively reduces the Cl and alkali metal content of biomass. Specifically, it was determined that biomass char produced through deeply pyrolysis at 300 °C achieves the highest NO reduction efficiency while minimizing the presence of harmful components. At a reduction temperature of 700 °C, both re-burning and advanced re-burning techniques exhibit NO reduction efficiencies of 55.90% and 62.22%, which is already an ideal deficiency at low temperatures. The addition of water vapor at 700–800 °C obviously avoids the oxidation of ammonia to NO in advanced re-burning. Upon further analysis, denitrification efficiency in biomass char re-burning and advanced re-burning is influenced not only by volatile content but also by physicochemical properties such as porosity and surface functional group distribution under certain reaction conditions. This study provides a theoretical framework for the industrial implementation of biomass char for NO control in coal-fired power plants, offering insights into optimizing NO reduction efficiency while mitigating potential risks to boiler equipment.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"80 ","pages":"Pages 119-129"},"PeriodicalIF":3.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768781","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

Hybrid modelling incorporating reaction and mechanistic data for accelerating the development of isooctanol oxidation 结合反应和机理数据的混合模型，加速异辛醇氧化的发展

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-04-01 DOI: 10.1016/j.cjche.2025.02.003

Xin Zhou , Ce Liu , Zhibo Zhang , Xinrui Song , Haiyan Luo , Weitao Zhang , Lianying Wu , Hui Zhao , Yibin Liu , Xiaobo Chen , Hao Yan , Chaohe Yang

{"title":"Hybrid modelling incorporating reaction and mechanistic data for accelerating the development of isooctanol oxidation","authors":"Xin Zhou , Ce Liu , Zhibo Zhang , Xinrui Song , Haiyan Luo , Weitao Zhang , Lianying Wu , Hui Zhao , Yibin Liu , Xiaobo Chen , Hao Yan , Chaohe Yang","doi":"10.1016/j.cjche.2025.02.003","DOIUrl":"10.1016/j.cjche.2025.02.003","url":null,"abstract":"<div><div>Alcohol oxidation is a widely used green chemical reaction. The reaction process produces flammable and explosive hydrogen, so the design of the reactor must meet stringent safety requirements. Based on the limited experimental data, utilizing the traditional numerical method of computational fluid dynamics (CFD) to simulate the gas-liquid two-phase flow reactor can mitigate the risk of danger under varying working conditions. However, the calculation process is highly time-consuming. Therefore, by integrating process simulation, computational fluid dynamics, and deep learning technologies, an intelligent hybrid chemical model based on machine learning was proposed to expedite CFD calculations, enhance the prediction of flow fields, conversion rates, and concentrations inside the reactor, and offer insights for designing and optimizing the reactor for the alcohol oxidation system. The results show that the hybrid model based on the long and short-term memory neural network achieves 99.8% accuracy in conversion rate prediction and 99.9% accuracy in product concentration prediction. Through validation, the hybrid model is accelerated by about 360 times compared with instrumental analysis in conversion rate prediction and about 45 times compared with CFD calculation in concentration distribution prediction. This hybrid model can quickly predict the conversion rate and product concentration distribution in the gas-liquid two-phase flow reactor and provide a model reference for fast prediction and accurate control in the actual chemical production process.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"80 ","pages":"Pages 166-183"},"PeriodicalIF":3.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776765","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