Chinese Journal of Chemical Engineering最新文献_第8页

Ultrasonic-assisted rapid liquid-phase exfoliation of MFI-type zeolite nanoparticle aggregates 超声辅助mfi型沸石纳米颗粒聚集体的液相快速剥落

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Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.02.029

Xinyi Gao, Qiancheng Zheng, Zhengbao Wang

{"title":"Ultrasonic-assisted rapid liquid-phase exfoliation of MFI-type zeolite nanoparticle aggregates","authors":"Xinyi Gao, Qiancheng Zheng, Zhengbao Wang","doi":"10.1016/j.cjche.2025.02.029","DOIUrl":"10.1016/j.cjche.2025.02.029","url":null,"abstract":"<div><div>The preparation of dispersible MFI-type zeolite nanoparticles with open micropores is challenging. Herein, a rapid and effective ultrasound-assisted liquid-phase exfoliation method along with a freeze-drying process for redispersion of calcined silicalite-1 (S-1) zeolite nanoparticle aggregates using 3-aminopropanol as an exfoliating agent is demonstrated. The exfoliation of S-1 zeolite nanoparticles is characterized by X-ray diffraction, scanning electron microscopy and DLS particle size analysis. The effects of drying methods of as-synthesized zeolite nanoparticle suspension, zeolite contents in frozen nanoparticle suspension, exfoliating agent concentrations, and zeolite doses in ultrasonic suspension on exfoliation efficiency are systematically investigated. It is found that the S-1 zeolite nanoparticle (∼70 nm) achieves a yield up to 95% through a 30 min ultrasonic exfoliation in a 3-aminopropanol solution along with a freeze-drying process. The proposed exfoliation mechanism involves two primary stages: guest molecule insertion followed by water expansion, both substantially enhanced by tip sonication. This work offers a comprehensive understanding of the exfoliation process, provides valuable insights into the dispersion of sintered zeolite nanoparticles.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 38-50"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563795","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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Recent advances in the biosynthesis of natural products from C1 compounds C1类化合物天然产物的生物合成研究进展

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Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.03.013

Xinzhe Zhang, Aipeng Li, Xiaohan Huang, Qiang Fei

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Experimental study of methane hydrate formation and rheological behavior in gas-water-sand system 气-水-砂体系甲烷水合物形成及流变性能实验研究

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Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.03.007

Cheng Yu , Lin Wang , Chuanjun Han , Mingjun Du , Rui Xie , Honglin Li , Fangjun Zuo

{"title":"Experimental study of methane hydrate formation and rheological behavior in gas-water-sand system","authors":"Cheng Yu , Lin Wang , Chuanjun Han , Mingjun Du , Rui Xie , Honglin Li , Fangjun Zuo","doi":"10.1016/j.cjche.2025.03.007","DOIUrl":"10.1016/j.cjche.2025.03.007","url":null,"abstract":"<div><div>During the production of natural gas hydrates, micron-sized sand particles coexist with hydrate within the transportation pipeline, posing a significant threat to the safety of pipeline flow. However, the influence of sand particles on hydrate formation mechanisms and rheological properties remains poorly understood. Consequently, using a high-pressure reactor system, the phase equilibrium conditions, hydrate formation characteristics, hydrate concentration, and the slurry viscosity in micron-sized sand system are investigated in this work. Furthermore, the effects of sand particle size, sand concentration, and initial pressure on these properties are analyzed. The results indicate that a high concentration of micron-sized sand particles enhances the formation of methane hydrates. When the volume fraction of sand particles exceeds or equals 3%, the phase equilibrium conditions of the methane hydrate shift to the left relative to that of the pure water system(lower temperature, higher pressure). This shift becomes more pronounced with smaller particle sizes. Besides, under these sand concentration conditions, methane hydrates exhibit secondary or even multiple formation events, though the formation rate decreases. Additionally, the torque increases significantly and fluctuates considerably. The Roscoe-Brinkman model yields the most accurate slurry viscosity calculations, and as sand concentration increases, both hydrate concentration and slurry viscosity also increase.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 315-324"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694975","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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Experimental analysis of internal flow and spray characteristics of flow focusing/blurring nozzle 流动聚焦/模糊喷嘴内部流动及喷雾特性实验分析

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Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.03.002

Jin Zhao , Zhi Ning , Ming Lv , Xu He

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Efficient syngas production from medical waste by CO2 thermal plasma gasification 利用CO2热等离子气化技术从医疗废物中高效生产合成气

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Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.04.007

Menglong Wang , Yanping Yu , Baogen Su , Wenjun Zhang , Qiwei Yang

{"title":"Efficient syngas production from medical waste by CO2 thermal plasma gasification","authors":"Menglong Wang , Yanping Yu , Baogen Su , Wenjun Zhang , Qiwei Yang","doi":"10.1016/j.cjche.2025.04.007","DOIUrl":"10.1016/j.cjche.2025.04.007","url":null,"abstract":"<div><div>The production of medical waste (MW) is a growing concern, particularly in light of the increasing annual generation and the exacerbating effects of the COVID-19 pandemic. Traditional techniques such as incineration and landfilling present significant limitations. In this study, a self-designed 50 kW arc plasma reactor was employed to conduct gasification experiments on nitrile-butadiene rubber (NBR) which served as a model of MW and a mixture of NBR/SiO<sub>2</sub> which served as a model of glass-containing MW, using CO<sub>2</sub> as the working gas. The CO<sub>2</sub> thermal plasma gasification process not only ensures the safe and efficient disposal of MW, but also facilitates its effective conversion into H<sub>2</sub> and CO, achieving a carbon conversion efficiency of 94.52%. The yields of H<sub>2</sub> and CO reached 98.52% and 81.83%, respectively, and the specific energy consumption was as low as 3.55 kW·h·kg<sup>−1</sup>. Furthermore, the addition of SiO<sub>2</sub> was found to inhibit the gasification of NBR and cause damage to the reactor. Therefore, it is recommended that glass waste should be removed prior to the treatment of MW. The CO<sub>2</sub> thermal plasma gasification technology can not only eliminate environmental and health risks posed by MW, but also convert it into syngas for further utilization. This provides a promising approach to the harmless and resource disposal of MW, while also contributing to the comprehensive utilization of greenhouse gases.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 88-97"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588317","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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A transformer-based model for predicting and analyzing light olefin yields in methanol-to-olefins process 甲醇制烯烃过程中基于变压器的轻烯烃产率预测与分析模型

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.03.008

Yuping Luo , Wenyang Wang , Yuyan Zhang , Muxin Chen , Peng Shao

{"title":"A transformer-based model for predicting and analyzing light olefin yields in methanol-to-olefins process","authors":"Yuping Luo , Wenyang Wang , Yuyan Zhang , Muxin Chen , Peng Shao","doi":"10.1016/j.cjche.2025.03.008","DOIUrl":"10.1016/j.cjche.2025.03.008","url":null,"abstract":"<div><div>This study introduces an innovative computational framework leveraging the transformer architecture to address a critical challenge in chemical process engineering: predicting and optimizing light olefin yields in industrial methanol-to-olefins (MTO) processes. Our approach integrates advanced machine learning techniques with chemical engineering principles to tackle the complexities of non-stationary, highly volatile production data in large-scale chemical manufacturing. The framework employs the maximal information coefficient (MIC) algorithm to analyze and select the significant variables from MTO process parameters, forming a robust dataset for model development. We implement a transformer-based time series forecasting model, enhanced through positional encoding and hyperparameter optimization, significantly improving predictive accuracy for ethylene and propylene yields. The model's interpretability is augmented by applying SHapley additive exPlanations (SHAP) to quantify and visualize the impact of reaction control variables on olefin yields, providing valuable insights for process optimization. Experimental results demonstrate that our model outperforms traditional statistical and machine learning methods in accuracy and interpretability, effectively handling nonlinear, non-stationary, high-volatility, and long-sequence data challenges in olefin yield prediction. This research contributes to chemical engineering by providing a novel computerized methodology for solving complex production optimization problems in the chemical industry, offering significant potential for enhancing decision-making in MTO system production control and fostering the intelligent transformation of manufacturing processes.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 266-276"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144613779","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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Adsorption, separation and recovery performance of spherical PR/CMC/AC composites for cadmium-contaminated soil remediation 球形PR/CMC/AC复合材料对镉污染土壤的吸附、分离和回收性能

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.03.003

Fan Zhang, Miaomiao Zhao, Xiaoyu Jia, Chen Li, Degang Ma

{"title":"Adsorption, separation and recovery performance of spherical PR/CMC/AC composites for cadmium-contaminated soil remediation","authors":"Fan Zhang, Miaomiao Zhao, Xiaoyu Jia, Chen Li, Degang Ma","doi":"10.1016/j.cjche.2025.03.003","DOIUrl":"10.1016/j.cjche.2025.03.003","url":null,"abstract":"<div><div>Activated carbon (AC) is considered to be an excellent adsorbent due to its high specific surface area and various functional groups. AC powders are available in sizes ranging from 44 to 150 μm. Its particle size prevent its separation from the soil. Therefore, when AC powder is applied to Cd-contaminated soil, it only reduces the bioavailability of Cd and Cd is not necessarily removed but semi-immobilized. Recovery of adsorbent materials from the soil is therefore a preferred soil remediation method. In order to achieve the separation of Cd from soil and the recovery and reuse of AC, a batch of phenolic resin (PR) -carboxymethyl cellulose (CMC)-activated carbon (AC) composite (PCC-800) with uniform particle diameter (diameter 0.8 mm) and high compressive strength was prepared. PCC-800 composites were made of PR/CMC/AC calcined at 800 °C in a certain ratio. The Barrett−Joyner−Halender results showed that the PCC-800 spheres own a mesoporous structure. The compressive strength of PCC-800 pellets was 20.6 N. After first adsorption cycle, total Cd in the soil decreased by 52.18% while bioavailable Cd decreased to 25.68% of the original soil. After three cycles, the recovery rates of PCC-800 were 90.37% and the adsorption regeneration was 72.73%. The PCC-800 immobilized Cd by adsorption, precipitation and complexation reaction. This study demonstrates the potential for developing adsorbents that are both easily separable from soil and highly effective in adsorption.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 199-207"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605241","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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Fabrication of Sb-based alloys/carbon nanofibers with uniform dispersion as anode material for high efficiency sodium storage 均匀分散的铌基合金/碳纳米纤维作为高效储钠阳极材料的制备

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.03.017

Zhe Wang , Zhengpeng Zhu , Kai Xue , Xingmei Guo , Yuanjun Liu , Xiangjun Zheng , Qianqian Fan , Zhongyao Duan , Qinghong Kong , Junhao Zhang

{"title":"Fabrication of Sb-based alloys/carbon nanofibers with uniform dispersion as anode material for high efficiency sodium storage","authors":"Zhe Wang , Zhengpeng Zhu , Kai Xue , Xingmei Guo , Yuanjun Liu , Xiangjun Zheng , Qianqian Fan , Zhongyao Duan , Qinghong Kong , Junhao Zhang","doi":"10.1016/j.cjche.2025.03.017","DOIUrl":"10.1016/j.cjche.2025.03.017","url":null,"abstract":"<div><div>To solve the serious volume expansion problem of Sb-based anode materials in the alloying/dealloying process, a strategy combining electrospinning and hydrogen reduction is proposed to prepare a series of Sb-based alloys/carbon nanofiber composites (SbM/CNFs, M = Co, Zn, Ni). Inactive elements are innovatively introduced to form Sb based alloys with enhanced stability. The results show that the content of SbCo nanoparticles is high to 69.12% (mass), which are uniformly dispersed in carbon fibers. When evaluated as anode material for SIBs, SbCo/CNFs anode exhibits excellent sodium storage capacity, the initial discharge capacity is 580.0 mA h·g<sup>−1</sup> at 0.1 A g<sup>−1</sup>, which can hold 483.5 mA h·g<sup>−1</sup> after 100 cycles. Even the current density increases to 1.0 A g<sup>−1</sup>, the specific capacity still maintains at 344.5 mA h·g<sup>−1</sup> after 150 cycles. The improved sodium storage capacity is attributed to the synergistic effect of conductive carbon fibers and SbCo nanoparticles with uniform dispersion, which not only provide excellent electronic conductivity, but also enhance structural stability to reduce volume change.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 208-216"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614039","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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Synthesis of magnetically separable and recyclable MnFe2O4@SiO2@NH2 nanocomposite coupled-acylated MWCNTS with enhanced photocatalytic performance under visible-light irradiation 可见光下磁可分离可回收MnFe2O4@SiO2@NH2纳米复合偶联酰化MWCNTS的合成及其光催化性能的增强

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.02.022

Mika Sillanpää , Mohammad Reza kimiaei , Soheil Balsini Gavanaroudi , Nezamaddin Mengelizadeh , Najmeh Ahmadi , Davoud Balarak

{"title":"Synthesis of magnetically separable and recyclable MnFe2O4@SiO2@NH2 nanocomposite coupled-acylated MWCNTS with enhanced photocatalytic performance under visible-light irradiation","authors":"Mika Sillanpää , Mohammad Reza kimiaei , Soheil Balsini Gavanaroudi , Nezamaddin Mengelizadeh , Najmeh Ahmadi , Davoud Balarak","doi":"10.1016/j.cjche.2025.02.022","DOIUrl":"10.1016/j.cjche.2025.02.022","url":null,"abstract":"<div><div>A MnFe<sub>2</sub>O<sub>4</sub>@SiO<sub>2</sub>@NH<sub>2</sub> coupled with acylated multi-walled carbon nanotubes (AMWCNT<sub>S</sub>) was prepared using an easy one-step modification approach and applied for the visible light-assisted removal of ciprofloxacin (CIP). FT-IR, XRD, VSM, Raman spectrum, FE-SEM, BJH/BET, UV-Vis, and band gap analysis were used to characterize nanocomposites. In terms of CIP removal, the nanocomposites outperformed both AMWCNT<sub>S</sub> and MnFe<sub>2</sub>O<sub>4</sub>@SiO<sub>2</sub>@NH<sub>2</sub> nanoparticles. At a pH of 7, an initial CIP concentration of 25 mg·L<sup>−1</sup>, a reaction time of 40 min, and a catalyst dose of 0.8 g·L<sup>−1</sup>, all of the CIP was degraded. The ratios of BOD<sub>5</sub>/COD (5-day biological oxygen demand/chemical oxygen demand) and BOD<sub>5</sub>/TOC (5-day biological oxygen demand/total organic carbon) at the beginning of the process were 0.22 and 0.71, respectively, and reached 0.755 and 1.21 at the end of the process, which signposts the conversion of non-biodegradable wastewater into biodegradable wastewater. Scavenger studies disclosed that hydroxyl radicals and holes had the greatest effect on the degradation of CIP. The toxicity of the final effluent was also investigated with <em>E. coli</em> bacteria, and the results showed a very good effect of the process in the field of effluent sterilization. Equilibrium data fully followed first-order kinetics, with a reaction rate constant of 0.109 min<sup>−1</sup>. Also, the half-life for the complete degradation of CIP was equal to 6.8 min. The CIP removal efficiency still remained at 9.4% in the five cycles. MnFe<sub>2</sub>O<sub>4</sub>@SiO<sub>2</sub>@NH<sub>2</sub>@AMWCNT<sub>S</sub> gave a pronounced potential for eliminating CIP from aqueous environment.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 229-243"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614041","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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Method and theory for optimising ash-fusion characteristics in high-aluminium coal ash via coal blending technology 配煤技术优化高铝煤灰灰融合特性的方法与理论

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-07-01 DOI: 10.1016/j.cjche.2025.02.037

Baoliang Xia , Lirui Mao , Hanxu Li , Chengli Wu , Facun Jiao

{"title":"Method and theory for optimising ash-fusion characteristics in high-aluminium coal ash via coal blending technology","authors":"Baoliang Xia , Lirui Mao , Hanxu Li , Chengli Wu , Facun Jiao","doi":"10.1016/j.cjche.2025.02.037","DOIUrl":"10.1016/j.cjche.2025.02.037","url":null,"abstract":"<div><div>China has abundant resources of high-alumina coal (HAC). However, its application as a raw gasification material is limited owing to high ash-fusion characteristics. For overcoming the limitation, this study employed Xinjiang coal (XJ), having a low ash fusion temperature, to improve the ash fusibility and viscosity of high-alumina Jungar coal (JG). The evolution of Al-containing phases and structures during mixed ash melting were investigated based on XRD, XPS, <sup>27</sup>Al NMR, high-temperature stage microscopy (HTSM), and thermodynamic simulations. An increase in the XJ mass ratio resulted in the transformation of gehlenite to anorthite and mullite, producing more amorphous materials at high temperature. These phenomena were manifested at a microscopic imaging as an increase in the number of reaction/melting sites and their area expansion rate, as well as a decrease in ash area shrinkage and melting temperature. Moreover, the introduction of XJ altered the alumina–oxygen network, reducing the binding to the silica-oxygen network and converting some [AlO<sub>6</sub>]<sup>9−</sup> to [AlO<sub>4</sub>]<sup>5−</sup> as the relative concentration of O<sup>2−</sup> and O<sup>−</sup> increases. Consequently, the decrease in the stability of the aluminate structure improves the AFT and viscosity. Based on these results, a mechanism to improve the ash fusion characteristics of HAC based on coal blending is proposed.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"83 ","pages":"Pages 254-265"},"PeriodicalIF":3.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614488","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