Chinese Journal of Chemical Engineering最新文献

Preparation of Mn-Ce oxide-loaded Al2O3 by citric acid-assisted impregnation for enhanced catalytic ozonation degradation of dye wastewater

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-12-01 DOI: 10.1016/j.cjche.2024.08.011

Shaopeng Li , Weichao Li , Yun Wu , Xianming Zheng , Xuehui Zhao , Ning Nan , Hongwei Zhang

{"title":"Preparation of Mn-Ce oxide-loaded Al2O3 by citric acid-assisted impregnation for enhanced catalytic ozonation degradation of dye wastewater","authors":"Shaopeng Li , Weichao Li , Yun Wu , Xianming Zheng , Xuehui Zhao , Ning Nan , Hongwei Zhang","doi":"10.1016/j.cjche.2024.08.011","DOIUrl":"10.1016/j.cjche.2024.08.011","url":null,"abstract":"<div><div>The performance of supported catalysts is significantly affected by the dispersion degree of the active components on the support. In this study, citric acid (CA) was used as a modifier to prepare Al<sub>2</sub>O<sub>3</sub> supported Mn-Ce oxides (Mn-Ce/CA-Al<sub>2</sub>O<sub>3</sub>) by the impregnation-calcination method. The characterization results showed that adding citric acid enhanced the dispersion of Mn-Ce oxides on the support, rendering Mn-Ce/CA-Al<sub>2</sub>O<sub>3</sub> with a larger specific surface area and abundant surface hydroxyl groups, thereby providing more reaction sites for catalytic ozonation. The Mn-Ce/CA-Al<sub>2</sub>O<sub>3</sub> exhibited excellent catalytic ozonation performance in degrading Reactive Black 5 (RB5) dye. It achieved nearly complete decolorization of RB5 within 60 min, with a COD removal efficiency of 60%, which was superior to the sole ozonation (30%). Furthermore, the Mn-Ce/CA-Al<sub>2</sub>O<sub>3</sub> system demonstrated significant degradation of RB5 over a wide pH range of 3–11. Based on the XPS and EPR analysis results, a preliminary mechanism of catalytic ozonation over the Mn-Ce/CA-Al<sub>2</sub>O<sub>3</sub> was proposed. The redox cycle of Mn<sup>3+</sup>/Mn<sup>4+</sup> and Ce<sup>3+</sup>/Ce<sup>4+</sup> effectively accelerated the electron transfer process, thus promoting the generation of reactive oxygen species (ROS) and improving the degradation of RB5. Meanwhile, the Mn-Ce/CA-Al<sub>2</sub>O<sub>3</sub> exhibited superior catalytic stability and effective treatment capabilities for real dye wastewater.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"76 ","pages":"Pages 237-250"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743735","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 fuzzy compensation-Koopman model predictive control design for pressure regulation in proten exchange membrane electrolyzer

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-12-01 DOI: 10.1016/j.cjche.2024.09.004

Haokun Xiong, Lei Xie, Cheng Hu, Hongye Su

引用次数: 0

Effect of cobalt on the activity of nickel-based/magnesium-substituted hydroxyapatite catalysts for dry reforming of methane

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-12-01 DOI: 10.1016/j.cjche.2024.07.025

Tongming Su , Bo Gong , Xinling Xie , Xuan Luo , Zuzeng Qin , Hongbing Ji

{"title":"Effect of cobalt on the activity of nickel-based/magnesium-substituted hydroxyapatite catalysts for dry reforming of methane","authors":"Tongming Su , Bo Gong , Xinling Xie , Xuan Luo , Zuzeng Qin , Hongbing Ji","doi":"10.1016/j.cjche.2024.07.025","DOIUrl":"10.1016/j.cjche.2024.07.025","url":null,"abstract":"<div><div>The dry reforming of methane (DRM) reaction can directly convert methane (CH<sub>4</sub>) and carbon dioxide (CO<sub>2</sub>) into syngas (H<sub>2</sub>+CO), which is a promising method for achieving carbon neutralization. In this study, a series of 3Ni-<em>x</em>Co/Mg<sub>1</sub>HAP alloy catalysts with different ratio were synthesized by the coprecipitation method, and the optimum Ni–Co ratio for the DRM reaction was studied. A series of characterization methods revealed that after Co was added, the formation of Ni–Co alloys increased the interactions between metals. However, an excess of Co inhibits the entry of Ni into the lattice of Mg<sub>1</sub>HAP, resulting in metal accumulation on the surface of the support. In addition, the introduction of Co improves the dispersion of Ni metal, which endows the catalyst with better catalytic activity and stability. Raman spectroscopy of the catalyst after the stability test showed that the addition of Co reduced the proportion of graphitic carbon, which was also the main reason for its improved stability.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"76 ","pages":"Pages 281-291"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743949","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

Preparation of coconut oil/aluminum nitride/expanded graphite composite phase change materials with high thermal conductivity and stable shape for thermal energy storage

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-12-01 DOI: 10.1016/j.cjche.2024.08.008

Chao Gao , Feng Jiang , Benguo Zhang , Mingchuan Shen , Yuguo Zhang

{"title":"Preparation of coconut oil/aluminum nitride/expanded graphite composite phase change materials with high thermal conductivity and stable shape for thermal energy storage","authors":"Chao Gao , Feng Jiang , Benguo Zhang , Mingchuan Shen , Yuguo Zhang","doi":"10.1016/j.cjche.2024.08.008","DOIUrl":"10.1016/j.cjche.2024.08.008","url":null,"abstract":"<div><div>Phase change energy storage is one of the solutions to effectively deal with the problem of intermittency and spatial and temporal mismatch between supply and demand of new energy sources (solar, wind, <em>etc</em>.). However, phase change materials (PCMs) suffer from low thermal conductivity, which greatly affects energy storage and release efficiency. In this study, a novel shape-stable phase change material (SSPCM) was prepared by mixing coconut oil (CO) as a PCM with aluminum nitride (AlN) thermally conductive reinforcing particles and vacuum impregnated into expanded graphite (EG). The results showed that the thermal conductivity of the prepared SSPCM reached 2.985 W·m<sup>–1</sup>·K<sup>–1</sup>, which was 1765% higher than that of pure CO. The latent heat of SSPCM was 83.67 J·g<sup>–1</sup>, which was 99% of the theoretical value. Furthermore, SSPCM showed excellent thermal stability and thermal cycle reliability. The proposed SSPCMs have the advantages of being renewable and simple preparation methods, which have great potential for application.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"76 ","pages":"Pages 272-280"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743948","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

Multi-timescale feature extraction method of wastewater treatment process based on adaptive entropy

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-12-01 DOI: 10.1016/j.cjche.2024.07.024

Honggui Han , Yaqian Zhao , Xiaolong Wu , Hongyan Yang

{"title":"Multi-timescale feature extraction method of wastewater treatment process based on adaptive entropy","authors":"Honggui Han , Yaqian Zhao , Xiaolong Wu , Hongyan Yang","doi":"10.1016/j.cjche.2024.07.024","DOIUrl":"10.1016/j.cjche.2024.07.024","url":null,"abstract":"<div><div>In wastewater treatment systems, extracting meaningful features from process data is essential for effective monitoring and control. However, the multi-time scale data generated by different sampling frequencies pose a challenge to accurately extract features. To solve this issue, a multi-timescale feature extraction method based on adaptive entropy is proposed. Firstly, the expert knowledge graph is constructed by analyzing the characteristics of wastewater components and water quality data, which can illustrate various water quality parameters and the network of relationships among them. Secondly, multiscale entropy analysis is used to investigate the inherent multi-timescale patterns of water quality data in depth, which enables us to minimize information loss while uniformly optimizing the timescale. Thirdly, we harness partial least squares for feature extraction, resulting in an enhanced representation of sample data and the iterative enhancement of our expert knowledge graph. The experimental results show that the multi-timescale feature extraction algorithm can enhance the representation of water quality data and improve monitoring capabilities.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"76 ","pages":"Pages 264-271"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743737","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 model free adaptive control method based on self-adjusting PID algorithm in pH neutralization process

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-12-01 DOI: 10.1016/j.cjche.2024.09.005

Kang Liu, You Fan, Juan Chen

{"title":"A model free adaptive control method based on self-adjusting PID algorithm in pH neutralization process","authors":"Kang Liu, You Fan, Juan Chen","doi":"10.1016/j.cjche.2024.09.005","DOIUrl":"10.1016/j.cjche.2024.09.005","url":null,"abstract":"<div><div>In this paper, a new model free adaptive control method based on self-adjusting PID algorithm (MFAC-SA-PID) is proposed to solve the problem that the pH process with strong nonlinearity is difficult to control near the neutralization point. The MFAC-SA-PID method also solves the problem that the parameters of the model free adaptive control (MFAC) method are not easy to be adjusted and the effect is not obvious by introducing a fuzzy self-adjusting algorithm to adjust the controller parameters. Then the convergence and stability of the MFAC-SA-PID method are proved in this paper. In the simulation study, the control performance of the MFAC-SA-PID method proposed in this paper is compared with the traditional MFAC method and the improved model free adaptive control (IMFAC) method, respectively. The results show that the proposed MFAC-SA-PID method has better control effect on the pH neutralization process. The MFAC-SA-PID control performance also outperforms the traditional MFAC method and IMFAC method when step input disturbances are added, which indicates that the MFAC-SA-PID method has better robustness and stability.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"76 ","pages":"Pages 227-236"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743734","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

Ligand-tuning of coordination compound for improved oxygen evolution

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-12-01 DOI: 10.1016/j.cjche.2024.07.023

Kunpeng Yang , Yuanjun Liu , Yuyu Liu , Xingmei Guo , Xiangjun Zheng , Junhao Zhang , Guoxing Zhu

{"title":"Ligand-tuning of coordination compound for improved oxygen evolution","authors":"Kunpeng Yang , Yuanjun Liu , Yuyu Liu , Xingmei Guo , Xiangjun Zheng , Junhao Zhang , Guoxing Zhu","doi":"10.1016/j.cjche.2024.07.023","DOIUrl":"10.1016/j.cjche.2024.07.023","url":null,"abstract":"<div><div>Controllable regulation of the reconstruction process for the pre-catalysts towards oxygen evolution remains as a great challenge. In this study, we report a bi-ligand strategy to facilitate the structural transformation of coordination compounds to metal oxyhydroxides during oxygen evolution with enhanced activity. A coordination compound consisting of 1,1′-ferrocene acid (Fc) and Ni<sup>2+</sup> was synthesized, in which terephthalic acid was introduced. The second ligand of terephthalic acid facilitates the reconstruction process, inducing an enhanced catalytic activity. In 1 mol·L<sup>−1</sup> KOH aqueous solution, the optimized catalyst can drive a current density of 10 mA·cm<sup>–2</sup> under a lower overpotential of 220 mV. Using this catalyst, zinc-air batteries can be prepared. The obtained zinc-air battery presents a large specific capacity of 718 mA·h·g<sup>−1</sup> with excellent cycling stability for over 100 h far exceeding that of Pt/C+RuO<sub>2</sub> battery fabricated with commercial catalysts. The excellent performance and low cost of this catalyst will open up broad prospects for the development of advanced systems for water electrolysis and zinc air batteries.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"76 ","pages":"Pages 292-300"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743950","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

Optimization of capacity configuration and comprehensive evaluation of a renewable energy electrolysis of water for hydrogen production system

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-12-01 DOI: 10.1016/j.cjche.2024.09.003

Huairong Zhou , Xin Wu , Chunlei Li , Siyu Yang , Zhichen Chen , Jun Lu , Chen Fang

{"title":"Optimization of capacity configuration and comprehensive evaluation of a renewable energy electrolysis of water for hydrogen production system","authors":"Huairong Zhou , Xin Wu , Chunlei Li , Siyu Yang , Zhichen Chen , Jun Lu , Chen Fang","doi":"10.1016/j.cjche.2024.09.003","DOIUrl":"10.1016/j.cjche.2024.09.003","url":null,"abstract":"<div><div>The global green hydrogen industry is experiencing rapid growth, but the high production costs are hindering its widespread adoption. To address this challenge, it is particularly important to rationally configure a renewable energy hydrogen production system. For this purpose, the study proposes a model for capacity optimization configuration of a renewable energy hydrogen production system, which integrates wind power, photovoltaic (PV) power, and concentrating solar power (CSP) with alkaline electrolyzer. It conducts capacity optimization configuration and comprehensive evaluations of the hydrogen production system across various scenarios. To minimize the total daily consumption cost, the CPLEX solver is utilized to solve the objective function and determine the capacity configuration of the renewable energy electrolysis of water hydrogen production system generator set under various scenarios. This approach achieves a utilization rate of over 99% for renewable energy. Through comprehensive evaluation, research has found that renewable energy-coupled hydrogen production significantly reduces generator capacity and electricity generation costs compared to separate hydrogen production, enhancing the economic efficiency of the system. The Wind-PV-CSP coupling hydrogen production system has the smallest generator assembly capacity and the lowest hydrogen production cost, which is 18.84 CNY·kg<sup>−1</sup>, significantly lower than the cost of PV-CSP coupling hydrogen production (25.78 CNY·kg<sup>−1</sup>) and wind-PV coupling hydrogen production (25.86 CNY·kg<sup>−1</sup>). It has good development prospects and plays an important role in exploring the development path of large-scale on-site consumption of new energy.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"76 ","pages":"Pages 301-317"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743951","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 comparative techno-economic analysis for implementation of carbon dioxide to chemicals processes 实施二氧化碳制化学品工艺的技术经济比较分析

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-11-01 DOI: 10.1016/j.cjche.2024.07.013

Zhun Li , Jinyang Zhao , Ping Li , Yadong Yu , Chenxi Cao

{"title":"A comparative techno-economic analysis for implementation of carbon dioxide to chemicals processes","authors":"Zhun Li , Jinyang Zhao , Ping Li , Yadong Yu , Chenxi Cao","doi":"10.1016/j.cjche.2024.07.013","DOIUrl":"10.1016/j.cjche.2024.07.013","url":null,"abstract":"<div><div>CO<sub>2</sub>-based carbon-neutral organics production processes could potentially reshape the chemical industry. However, their feasibility and net carbon footprint rely strongly on the sources of H<sub>2</sub>. Herein, we present a comprehensive comparative techno-economic analysis of CO<sub>2</sub>-based methanol (CO<sub>2</sub>TM) and α-olefins (CO<sub>2</sub>TO) manufacturing using various feedstock supply modes: (1) the standalone mode with external CO<sub>2</sub> but H<sub>2</sub> from on-site water electrolysis, (2) the integrated mode with both CO<sub>2</sub> and H<sub>2</sub> recovered from coal-chemical plants, and (3) the integrated mode with recycled CO<sub>2</sub> but H<sub>2</sub> from on-site water electrolysis. The integration of CO<sub>2</sub>TM and CO<sub>2</sub>TO into coal-to-olefins (CTO) and coal-to-methanol (CTM) facilities is currently cost-effective and can reduce net CO<sub>2</sub> emissions by 65.7% and 68.5%, resulting in a three-fold and two-fold increase in carbon efficiency, respectively. As carbon tax policies and electrolysis technologies continue to evolve, standalone CO<sub>2</sub>TM and CO<sub>2</sub>TO are projected to become more economically competitive than CTO and CTM by 2035–2045.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"75 ","pages":"Pages 86-101"},"PeriodicalIF":3.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552996","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

Synthesis of flexible inter-plant heat exchanger networks: A decomposition method considering intermedium fluid circles 合成灵活的厂际换热网络：考虑中间流体圈的分解方法

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2024-11-01 DOI: 10.1016/j.cjche.2024.06.024

Ran Tao , Siwen Gu , Linlin Liu , Jian Du

{"title":"Synthesis of flexible inter-plant heat exchanger networks: A decomposition method considering intermedium fluid circles","authors":"Ran Tao , Siwen Gu , Linlin Liu , Jian Du","doi":"10.1016/j.cjche.2024.06.024","DOIUrl":"10.1016/j.cjche.2024.06.024","url":null,"abstract":"<div><div>The traditional methods for synthesizing flexible heat exchanger networks (HENs) are not directly applicable to inter-plant HEN challenges, primarily due to the spread of system uncertainty across plants via intermedium fluid circles. This complicates the synthesis process significantly. To tackle this issue, this study proposes a decomposed stepwise methodology to facilitate the flexible synthesis of the inter-plant HENs performing indirect heat integration. A decomposition strategy is proposed to divide the overall network into manageable sub-networks by dissecting the intermedium fluid circles. To address the variability in intermedium fluid temperatures, a temperature fluctuation analysis approach is developed and a heuristic rule is introduced to maintain the temperature feasibility of the intermedium fluids. To ensure adequate flexibility and cost-effectiveness of the designed networks, flexibility analysis and network retrofit steps are conducted through model-based optimization techniques. The efficacy of the method is demonstrated through two case studies, showing its potential in achieving the desired operational flexibility for inter-plant HENs.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"75 ","pages":"Pages 62-73"},"PeriodicalIF":3.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552991","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