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Optimization of biodiesel production from blends of waste cooking oil, animal fat, and castor seed oil for sustainable renewable energy development in Thailand 利用废食用油、动物脂肪和蓖麻籽油的混合物优化生产生物柴油,促进泰国可持续可再生能源的发展
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-02-01 DOI: 10.1016/j.cjche.2025.10.004
Sunti Phewphong , Wuttichai Roschat , Noppharat Khotsuno , Chaiwat Janlakorn , Tappagorn Leelatam , Bunterm Maneerat , Aekkaphon Thammayod , Sumana Tawil , Preecha Moonsin , Prawit Suwannarong , Boonyawan Yoosuk , Pathompong Janetaisong , Vinich Promarak
The increasing global emphasis on sustainable energy has highlighted the need for alternative biofuels, particularly in agricultural countries like Thailand. However, challenges remain in utilizing nonedible and waste-based feedstocks due to poor fuel properties and limited conversion efficiency. This study addresses these gaps by exploring the potential of underutilized and low-cost feedstocks—castor seed oil (CSO), waste cooking oil (WCO), and animal fat (ANF)—to produce high-quality biodiesel. The novelty of this work lies in optimizing ternary blends of these diverse feedstocks to overcome individual limitations, especially the high viscosity of CSO caused by its high ricinoleic acid content (89.26%). CSO was extracted using hexane maceration, yielding 50.07% ± 1.28% (mass) oil. Various WCO:ANF:CSO ratios were investigated to improve fuel properties, and their chemical composition and physicochemical characteristics were analyzed using GC, 1H-NMR, and FT-IR techniques. Two optimized blends—50:40:10 and 50:30:20—achieved significantly reduced viscosities (4.31 and 4.90 cSt, 1 cSt = 1 mm2·s−1), meeting ASTM D6751 and EN 14214 standards. These blends also exhibited high methyl ester content (>96.5%), good oxidative stability, and favorable cold-flow properties (pour and cloud points as low as −4 °C). To evaluate reaction efficiency, transesterification kinetics were modeled using pseudo-first-order assumptions. The ternary blend containing higher ANF content showed an enhanced reaction rate constant of 8.94 × 10−1 h−1, indicating improved conversion efficiency. Engine performance tests using agricultural diesel engines demonstrated comparable power output to conventional diesel, while emissions of CO2, CO, HC, and NO2 were significantly reduced. Furthermore, performance of the biodiesel blends was similar to commercial B10 and B20 fuels. In summary, this study presents an innovative approach to biodiesel production by combining CSO, WCO, and ANF in optimal ratios to yield a renewable, cost-effective, and environmentally friendly fuel.
全球对可持续能源的日益重视凸显了对替代生物燃料的需求,尤其是在泰国这样的农业国家。然而,由于燃料性能差和转换效率有限,在利用非食用和废物基原料方面仍然存在挑战。本研究通过探索未充分利用的低成本原料——蓖麻籽油(CSO)、废食用油(WCO)和动物脂肪(ANF)——生产高质量生物柴油的潜力,解决了这些差距。这项工作的新颖之处在于优化这些不同原料的三元共混物,以克服单个限制,特别是CSO的高蓖麻油酸含量(89.26%)造成的高粘度。用己烷浸渍法提取CSO,得率为50.07%±1.28%(质量)。研究了不同的WCO:ANF:CSO比例以改善燃料性能,并使用GC, 1H-NMR和FT-IR技术分析了其化学成分和物理化学特性。两种优化的混合物(50:40:10和50:30:20)的粘度显著降低(4.31和4.90 cSt, 1 cSt = 1 mm2·s−1),符合ASTM D6751和EN 14214标准。这些共混物还具有高甲酯含量(>96.5%)、良好的氧化稳定性和良好的冷流性能(倒点和浊点低至- 4°C)。为了评估反应效率,用伪一级假设对酯交换动力学进行了建模。ANF含量较高的三元共混物反应速率常数为8.94 × 10−1 h−1,表明转化率提高。使用农用柴油发动机进行的发动机性能测试表明,该发动机的输出功率与传统柴油发动机相当,同时二氧化碳、一氧化碳、HC和二氧化氮的排放显著降低。此外,生物柴油混合物的性能与商用B10和B20燃料相似。总之,这项研究提出了一种创新的生物柴油生产方法,通过将CSO、WCO和ANF以最佳比例组合在一起,生产出一种可再生的、具有成本效益的、环保的燃料。
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引用次数: 0
Adsorption of flubendiamide (pesticide) onto chitosan-modified magnetic biochar in environmental remediation 壳聚糖改性磁性生物炭吸附氟苯二胺(农药)的研究
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-01-01 DOI: 10.1016/j.cjche.2025.09.005
Hong-Hue Thi Nguyen , Yong-Ho Choi , Yong-Hoon Jeong , Jong-Guk Kim , Dong-Heui Kwak
Flubendiamide is a commonly used pesticide with low water solubility and a high organic carbon sorption constant, causing it to adhere to soil particles and negatively impact soil ecosystems. First, chili plant stems, typically discarded after the harvest season, represent an abundant local biomass resource with significant potential for utilization, and were converted into biochar through pyrolysis. Here, we describe the synthesis of biochar modified with iron and chitosan to increase the diversity of functions and surface functional groups of biochar. The resulting chitosan-modified magnetic biochar (CMBC) presents a full range of functional groups of chitosan and iron oxide as shown by Fourier-transform infrared spectroscopy. The correlation between flubendiamide concentration and the dose of biochar on adsorption was explored. The flubendiamide adsorption efficiency of CMBC (1% mass ratio of soil) reached 68.03% in 90 min. The highest adsorption capacity achieved was 0.95 mg·g−1. The flubendiamide adsorption mechanism by CMBC can be described with a pseudo-second-order kinetic model. The experiment data closely fit a Freundlich isotherm model (R2 = 0.998), and the low residual sum of squares values demonstrate the high model applicability. In this study, we present a comprehensive overview of pesticides, alongside kinetic and isotherm model studies of flubendiamide adsorption by CMBC. We emphasize the potential of modified biochar to enhance environmental remediation applications.
氟虫胺是一种常用的农药,水溶性低,有机碳吸附常数高,会附着在土壤颗粒上,对土壤生态系统产生负面影响。首先,辣椒植物茎是当地丰富的生物质资源,利用潜力巨大,通常在收获季节后被丢弃,并通过热解转化为生物炭。本文介绍了铁和壳聚糖改性生物炭的合成,以增加生物炭的功能和表面官能团的多样性。制备的壳聚糖改性磁性生物炭(CMBC)具有壳聚糖和氧化铁的全系列官能团。探讨了氟苯二胺浓度与生物炭吸附量的关系。CMBC(土壤质量比为1%)对氟苯二胺的吸附效率在90 min内达到68.03%。最高吸附量为0.95 mg·g−1。CMBC吸附氟苯二胺的机理可以用拟二级动力学模型来描述。实验数据与Freundlich等温模型拟合较好(R2 = 0.998),残差平方和值较低,表明模型适用性强。在这项研究中,我们介绍了农药的全面概述,以及CMBC吸附氟苯二胺的动力学和等温模型研究。我们强调改性生物炭在加强环境修复应用方面的潜力。
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引用次数: 0
Design and optimization of a high-efficiency distillation process for cellulosic fuel ethanol integrated with thermal coupling and molecular sieve adsorption 热耦合与分子筛吸附相结合的纤维素燃料乙醇高效蒸馏工艺设计与优化
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-01-01 DOI: 10.1016/j.cjche.2025.08.005
Xuefeng Feng , Shuaishuai Lu , Xuan Du , Shaolan Zhuang , Zhongqi Ren , Zhongwei Ding , Qunsheng Li , Weiying Feng , Hongkang Zhao
To address the challenges of high energy consumption and prominent costs in the traditional three-columns distillation process for cellulosic fuel ethanol, a distillation–molecular sieve coupling separation process is proposed. This process integrates a three-column (crude distillation column, first distillation column, second distillation column) system with a 3A molecular sieve adsorption deep dehydration unit. A thermal coupling network is constructed via differential pressure design (steam from medium/high-pressure columns as mutual heat sources, reboiler liquid waste heat for feed preheating), and molecular sieve adsorption conditions are optimized. The study first performs a thermodynamic consistency test on the ethanol–water system, determines optimal non-random two-liquid (NRTL) model binary interaction parameters via experimental data regression for Aspen Plus simulation. Aiming at minimum total annual cost (TAC), Aspen Plus is used to optimize process parameters (theoretical tray number, feed location, reflux ratio, side-draw position, etc.). Economic analysis shows this process reduces CO2 emission costs by 27.56%, TAC by 15.58% (to 5.123 × 106 USD·a−1), and increases ethanol purity to >99.6%, providing an effective solution for green, efficient separation.
针对纤维素燃料乙醇传统三塔蒸馏工艺能耗高、成本高的问题,提出了一种蒸馏-分子筛耦合分离工艺。本工艺由三塔(粗精馏塔、一精馏塔、二精馏塔)系统和3A分子筛吸附深度脱水装置组成。采用差压设计构建热耦合网络(中高压塔蒸汽为互热源,再沸器废热为进料预热),优化分子筛吸附条件。本研究首先对乙醇-水体系进行热力学一致性检验,通过Aspen Plus模拟实验数据回归确定非随机双液(NRTL)模型二元相互作用的最优参数。以年总成本(TAC)最小为目标,Aspen Plus用于优化工艺参数(理论托盘数、进料位置、回流比、侧边抽料位置等)。经济分析表明,该工艺降低CO2排放成本27.56%,TAC降低15.58% (5.123 × 106 USD·a−1),乙醇纯度提高到99.6%,为绿色高效分离提供了有效的解决方案。
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引用次数: 0
Efficient leukocyte removal and enhanced biocompatibility using PVDF membranes prepared by vapor-induced phase separation 利用气相分离制备的PVDF膜高效去除白细胞和增强生物相容性
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-01-01 DOI: 10.1016/j.cjche.2025.08.017
Ziqi Jin , Shuang Yao , Liang Li , Siyuan Sun , Yue Zhou , Jie Zhou , Zhaohui Wang , Zhaoliang Cui
To develop an efficient filter for removing white blood cells from whole blood, hydrophilic large-pore blended membranes of poly(vinylidene fluoride) (PVDF), polyvinyl pyrrolidone and polyethylene glycol, with good biocompatibility, were prepared using the process of vapor-induced phase separation at various PVDF concentrations. The results demonstrated that at a PVDF mass concentration of 14%, the membrane had increased surface roughness, significantly enhanced hydrophilicity and wettability, and a wetting time of 8 s. The surface roughness of the membrane was also reduced to 31.637 nm. Furthermore, hemolysis rate and protein adsorption tests indicated that the blended membranes possessed excellent biocompatibility. They were reduced to 2.48% and 34.44 μg·cm−2, respectively. The pore size of the fabricated membrane was relatively large, which reached approximately 8 μm respectively, satisfying the filtration requirements. Lastly, the effects of different temperatures and multi-layered filters on leukocyte removal and the retention of red blood cells and platelets from whole blood were evaluated. The results revealed that the leukocyte removal rate was highest at 4 °C and with three membrane layers, the leukocyte removal rate was highest, reaching 98.36%, while the RBC and platelet content remained nearly unchanged compared with the original blood. This study provides a new approach for blood cell separation that is expected to play a significant role in medical fields such as blood transfusion demonstrating great potential for application and innovation.
为了开发一种高效的全血白细胞滤除剂,采用气相分离法制备了具有良好生物相容性的聚偏氟乙烯(PVDF)、聚乙烯吡罗烷酮和聚乙二醇的亲水性大孔混滤膜。结果表明,当PVDF质量浓度为14%时,膜的表面粗糙度增加,亲水性和润湿性显著增强,润湿时间为8 s。膜的表面粗糙度也降低到31.637 nm。溶血率和蛋白质吸附试验表明,混合膜具有良好的生物相容性。分别降至2.48%和34.44 μg·cm−2。制备的膜孔径较大,孔径分别达到8 μm左右,满足过滤要求。最后,评估了不同温度和多层过滤器对全血白细胞去除和红细胞和血小板保留的影响。结果表明,白细胞去除率在4℃时最高,三层膜下白细胞去除率最高,达到98.36%,而红细胞和血小板含量与原始血液相比基本保持不变。本研究提供了一种新的血细胞分离方法,有望在输血等医疗领域发挥重要作用,具有巨大的应用和创新潜力。
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引用次数: 0
A hierarchical and role-driven digital twin system with applications to complex chemical process operation 一个层次和角色驱动的数字孪生系统,应用于复杂的化学过程操作
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-01-01 DOI: 10.1016/j.cjche.2025.09.017
Xinyu Tao , Runjie Yao , Lingyu Zhu , Changrui Xie , Muqian Zhang , Xi Chen
Digital twin technology brings more opportunities and challenges to chemical engineering in both academic and industry. A complex process could have multiple digitalization needs, including simulation, monitoring, operator training, etc.; thus, a hierarchical digital twin would be a comprehensive solution to that. In this study, a novel and general framework of the digital twin is proposed for operations in process industry. With the hierarchical structure, the framework can handle various tasks driven by different roles in process industry, including managers, engineers, and operators. To complete these tasks, the framework consists of three modules: OAS (Operation Analysis System), OMS (Operation Monitoring System), and OTS (Operator Training System). Each module focuses on one unique type of demand from the staff, as well as interactions among them enabling efficient data sharing. Based on the hierarchical framework, a digital twin system is applied for one complex industrial nitration process, which successfully enhances the operation efficiency and safety in several industrial scenarios with different demands.
数字孪生技术给化工行业带来了更多的机遇和挑战。一个复杂的过程可能有多种数字化需求,包括仿真、监控、操作人员培训等;因此,分层数字孪生将是一个全面的解决方案。在本研究中,提出了一个新的通用的数字孪生框架,用于流程工业的运营。通过层次结构,框架可以处理过程工业中不同角色(包括管理人员、工程师和操作员)驱动的各种任务。为了完成这些任务,该框架由三个模块组成:OAS(操作分析系统)、OMS(操作监控系统)和OTS(操作人员培训系统)。每个模块都侧重于员工的一种独特需求类型,以及他们之间的互动,从而实现有效的数据共享。基于分层框架,将数字孪生系统应用于一个复杂的工业硝化过程,成功地提高了不同需求工业场景下的操作效率和安全性。
{"title":"A hierarchical and role-driven digital twin system with applications to complex chemical process operation","authors":"Xinyu Tao ,&nbsp;Runjie Yao ,&nbsp;Lingyu Zhu ,&nbsp;Changrui Xie ,&nbsp;Muqian Zhang ,&nbsp;Xi Chen","doi":"10.1016/j.cjche.2025.09.017","DOIUrl":"10.1016/j.cjche.2025.09.017","url":null,"abstract":"<div><div>Digital twin technology brings more opportunities and challenges to chemical engineering in both academic and industry. A complex process could have multiple digitalization needs, including simulation, monitoring, operator training, <em>etc</em>.; thus, a hierarchical digital twin would be a comprehensive solution to that. In this study, a novel and general framework of the digital twin is proposed for operations in process industry. With the hierarchical structure, the framework can handle various tasks driven by different roles in process industry, including managers, engineers, and operators. To complete these tasks, the framework consists of three modules: OAS (Operation Analysis System), OMS (Operation Monitoring System), and OTS (Operator Training System). Each module focuses on one unique type of demand from the staff, as well as interactions among them enabling efficient data sharing. Based on the hierarchical framework, a digital twin system is applied for one complex industrial nitration process, which successfully enhances the operation efficiency and safety in several industrial scenarios with different demands.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"89 ","pages":"Pages 302-313"},"PeriodicalIF":3.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923044","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
Dual-regulated Cu-doped MnO2 nanowires confined in waste-derived carbon framework for high-performance aqueous zinc-ion batteries 用于高性能水锌离子电池的双调控cu掺杂MnO2纳米线
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-01-01 DOI: 10.1016/j.cjche.2025.09.015
Zhixiong Li , Chengli Wu , ChengJie Yin , Facun Jiao , Yuanchun Zhang , Lirui Mao
MnO2 stands out among cathode materials for aqueous zinc-ion batteries (AZIBs) high capacity and voltage, it has poor stability and slow Zn2+ kinetics. Herein, we propose a dual-regulation strategy integrating copper doping and carbon-based confinement. Residual carbon (RC), derived from acid-washed coal gasification fine slag (CGFS), serves as a conductive and porous framework for the directional growth of Cu-doped MnO2 nanowires (CMO@RC). The synergistic modulation of Cu-induced electronic structure tuning and carbon confinement induced mechanical/electrical stabilization significantly enhances Zn2+ transport and electrochemical performance. CMO@RC achieves a high capacity of 563 mA·h·g−1 at 0.1 A·g−1 and maintains 106% after 1000 cycles at 1 A·g−1. Kinetic analyses confirm the dual-path Zn2+ diffusion and accelerated reaction kinetics, while DFT calculations reveal that Cu doping enhances Mn 3d orbital hybridization and electron interaction with carbon, elevating the density of states near the Fermi level and reducing charge transfer barriers. Furthermore, pouch cell testing demonstrates outstanding flexibility and mechanical resilience. This study provides a cost-effective and scalable strategy for high-performance AZIBs, leveraging both experimental and theoretical validations.
MnO2在高容量、高电压的水性锌离子电池(AZIBs)正极材料中具有稳定性差、Zn2+动力学慢的特点。在此,我们提出了一种结合铜掺杂和碳基约束的双重调控策略。来自煤气化细渣(CGFS)的残碳(RC)是cu掺杂MnO2纳米线定向生长的导电多孔框架(CMO@RC)。cu诱导的电子结构调谐和碳约束诱导的机械/电气稳定的协同调制显著提高了Zn2+的输运和电化学性能。CMO@RC在0.1 a·g−1下可获得563 mA·h·g−1的高容量,在1 a·g−1下1000次循环后可保持106%的容量。动力学分析证实了Zn2+的双路扩散和加速反应动力学,而DFT计算表明Cu掺杂增强了Mn的三维轨道杂化和与碳的电子相互作用,提高了费米能级附近的态密度,降低了电荷转移势垒。此外,袋细胞测试显示出出色的柔韧性和机械弹性。本研究为高性能azib提供了一种具有成本效益和可扩展的策略,利用实验和理论验证。
{"title":"Dual-regulated Cu-doped MnO2 nanowires confined in waste-derived carbon framework for high-performance aqueous zinc-ion batteries","authors":"Zhixiong Li ,&nbsp;Chengli Wu ,&nbsp;ChengJie Yin ,&nbsp;Facun Jiao ,&nbsp;Yuanchun Zhang ,&nbsp;Lirui Mao","doi":"10.1016/j.cjche.2025.09.015","DOIUrl":"10.1016/j.cjche.2025.09.015","url":null,"abstract":"<div><div>MnO<sub>2</sub> stands out among cathode materials for aqueous zinc-ion batteries (AZIBs) high capacity and voltage, it has poor stability and slow Zn<sup>2+</sup> kinetics. Herein, we propose a dual-regulation strategy integrating copper doping and carbon-based confinement. Residual carbon (RC), derived from acid-washed coal gasification fine slag (CGFS), serves as a conductive and porous framework for the directional growth of Cu-doped MnO<sub>2</sub> nanowires (CMO@RC). The synergistic modulation of Cu-induced electronic structure tuning and carbon confinement induced mechanical/electrical stabilization significantly enhances Zn<sup>2+</sup> transport and electrochemical performance. CMO@RC achieves a high capacity of 563 mA·h·g<sup>−1</sup> at 0.1 A·g<sup>−1</sup> and maintains 106% after 1000 cycles at 1 A·g<sup>−1</sup>. Kinetic analyses confirm the dual-path Zn<sup>2+</sup> diffusion and accelerated reaction kinetics, while DFT calculations reveal that Cu doping enhances Mn 3d orbital hybridization and electron interaction with carbon, elevating the density of states near the Fermi level and reducing charge transfer barriers. Furthermore, pouch cell testing demonstrates outstanding flexibility and mechanical resilience. This study provides a cost-effective and scalable strategy for high-performance AZIBs, leveraging both experimental and theoretical validations.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"89 ","pages":"Pages 102-111"},"PeriodicalIF":3.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923481","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 intensification strategy for the liquid-only transfer dividing wall column separating ternary mixtures based on the column grand composite curve 基于柱大复合曲线的纯液传递分壁柱分离三元混合物的新型强化策略
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-01-01 DOI: 10.1016/j.cjche.2025.07.021
Zhongwen Song , Chenghao Xing , Yanyang Wu , Guilian Liu
The liquid-only transfer dividing wall column (LDWC) offers a promising path for industrializing dividing wall columns by simplifying vapor split control. However, their energy efficiency is insufficient due to the addition of heat at the bottom and its removal at the top. Therefore, developing an effective strategy to enhance the energy efficiency of the entire LDWC system is crucial. This work investigates the intensification of LDWC based on the column grand composite curve (CGCC) and thermodynamic analysis, proposing a novel intensification strategy to improve energy efficiency effectively. An optimization model with four blocks is developed to minimize the total annual cost (TAC) of the intensified LDWC. Energy, exergy, economic, and environmental analyses are used to evaluate its performance. Ternary mixtures with different easy separation indexes (ESI) are selected as illustrative examples. For mixtures with ESI ≤1, the optimal configuration involves partial feed preheating, compressors and intermediate reboilers on both side sections, along with optimized operating pressure. This setup leads to significant reductions in total energy consumption, TAC, and gas emissions by 43.80%, 28.08%, and 42.85% for ESI = 1, and by 46.17%, 29.06%, and 45.35% for ESI <1, respectively, when compared to conventional distillation sequences (CDS). For mixtures with ESI >1, the best performance is achieved by implementing partial feed preheating and modifications only to the right section. This results in reductions of 21.64% in energy consumption, 16.26% in TAC, and 21.51% in gas emissions when compared to CDS. In all cases, the optimal configurations show the lowest lost work and minimum work, indicating an improved thermodynamic performance.
纯液转移分壁塔通过简化蒸汽分裂控制,为分壁塔工业化提供了一条很有前途的途径。然而,由于底部的热量增加和顶部的热量去除,它们的能源效率不足。因此,制定有效的战略来提高整个LDWC系统的能源效率是至关重要的。本文基于柱状大复合曲线(CGCC)和热力学分析对LDWC的强化进行了研究,提出了一种有效提高能效的新型强化策略。为了使集约化LDWC的年总成本最小化,建立了一个包含四个分块的优化模型。能源、能源、经济和环境分析用于评估其性能。以具有不同易分离指数(ESI)的三元混合物为例。对于ESI≤1的混合物,最优配置包括部分进料预热、两侧的压缩机和中间再沸器,以及优化的操作压力。与传统蒸馏序列(CDS)相比,ESI = 1的总能耗、TAC和气体排放量分别显著降低43.80%、28.08%和42.85%,ESI = 1的总能耗、TAC和气体排放量分别降低46.17%、29.06%和45.35%。对于ESI >;1的混合物,通过实施部分进料预热和仅对适当部分进行修改来实现最佳性能。与CDS相比,这可以减少21.64%的能耗,16.26%的TAC和21.51%的气体排放。在所有情况下,最优配置都显示出最低的损失功和最小的功,表明热力学性能得到了改善。
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引用次数: 0
Solid–liquid equilibrium and yield correlation model of melt crystallization of dimethylphenol isomer mixtures 二甲基苯酚同分异构体混合物的固液平衡及产率相关模型
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-01-01 DOI: 10.1016/j.cjche.2025.08.012
Yuxi Zhang , Li Yang , Yixin Ma , Yan Zhang , Junya Cao , Jingcai Cheng , Chao Yang
Dimethylphenols serve as important intermediates in synthesizing pharmaceuticals and agrochemicals, yet traditional distillation struggles to separate their isomers due to minimal boiling point differences, and the development of melt crystallization is hampered by lacking solid–liquid equilibrium (SLE) data for some isomers. Therefore, the SLE data of both binary and ternary mixtures of 2,3-dimethylphenol (2,3-DMP), 3,5-dimethylphenol (3,5-DMP), and 3,4-dimethylphenol (3,4-DMP) were determined by using differential scanning calorimetry in this work. Additionally, crystallographic analysis was conducted to investigate the thermodynamic characteristics of these mixtures. The experimental results indicated that all the systems investigated in this research exhibited eutectic behavior. The experimentally obtained SLE data were well correlated with the Wilson and non-random two-liquid models. The excess thermodynamic functions were calculated to analyze the types and intensities of the molecular interactions occurring in the mixtures. Furthermore, this study developed a model for the correlation between the theoretical crystallization yield and the actual cooling yield and final yield in melt crystallization. This study has furnished reliable data essential for developing and optimizing the melt crystallization process of mixtures of 2,3-DMP, 3,5-DMP, and 3,4-DMP.
二甲基苯酚是合成药物和农用化学品的重要中间体,但由于沸点差异小,传统的蒸馏难以分离其异构体,并且由于缺乏某些异构体的固液平衡(SLE)数据,阻碍了熔融结晶的发展。因此,本文采用差示扫描量热法测定了二元和三元混合物2,3-二甲基苯酚(2,3- dmp)、3,5-二甲基苯酚(3,5- dmp)和3,4-二甲基苯酚(3,4- dmp)的SLE数据。此外,还进行了晶体学分析来研究这些混合物的热力学特性。实验结果表明,所研究的体系均表现出共晶行为。实验获得的SLE数据与Wilson和非随机双液体模型有很好的相关性。计算了过量热力学函数,分析了混合物中分子相互作用的类型和强度。此外,本文还建立了熔体结晶过程中理论结晶产率与实际冷却产率及最终产率之间的关联模型。本研究为开发和优化2,3- dmp、3,5- dmp和3,4- dmp混合物的熔融结晶工艺提供了必要的可靠数据。
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引用次数: 0
Engineering repairable nanoporous functional coatings on arbitrary substrates by manipulating phase behaviors of block copolymers 通过控制嵌段共聚物的相行为,在任意基材上实现工程可修复的纳米多孔功能涂层
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-01-01 DOI: 10.1016/j.cjche.2025.08.007
Jiemei Zhou , Xiang Ying , Daiwen Li , Mingjie Wei , Xiangyue Ye , Yong Wang
Nanoporous polymers are extensively coated on various substrates to deliver optical, permselective, or other functions. However, it remains desired to fast produce uniform nanoporous polymer coatings on substrates with complex surfaces. Herein, by manipulating the interactions between block copolymers and selective solvents, we prepare repairable nanoporous polymers on arbitrary substrates. This is realized by an extremely simple sequential coating process: sequential coating of block copolymers and their swelling agents on substrate surfaces. The swelling agents are comprised of two solvents that swell the constituent blocks of the copolymers to different degrees, rapidly producing polymer coatings with uniform, interconnected, sub-50 nm pores. This sequential coating process is able to conformally build nanoporous polymers on nonplanar substrates with large lateral sizes and complex surface features, and also to in situ repair defects arising during usages. We further demonstrate that the nanoporous coatings show excellent antireflective and membrane separation performances. This sequential coating process is dictated by polymer–solvent interactions, and is expected to find applications in diverse fields for its simplicity, adaptability, and the capability to produce well-defined nanoporosities.
纳米多孔聚合物被广泛地涂覆在各种基底上,以提供光学、超选择性或其他功能。然而,在具有复杂表面的基底上快速制备均匀的纳米多孔聚合物涂层仍然是人们所需要的。在这里,通过控制嵌段共聚物和选择性溶剂之间的相互作用,我们在任意基底上制备了可修复的纳米多孔聚合物。这是通过一个非常简单的顺序涂层过程实现的:在基材表面上依次涂覆嵌段共聚物及其膨胀剂。膨胀剂由两种溶剂组成,它们可以不同程度地膨胀共聚物的组成块,迅速产生具有均匀、相互连接、低于50纳米孔隙的聚合物涂层。这种连续涂覆工艺能够在具有大横向尺寸和复杂表面特征的非平面基底上以保形方式构建纳米多孔聚合物,也可以在使用过程中原位修复缺陷。我们进一步证明了纳米多孔涂层具有优异的抗反射和膜分离性能。这种连续的涂层工艺是由聚合物-溶剂相互作用决定的,由于其简单性、适应性和产生良好定义的纳米孔隙的能力,有望在不同领域找到应用。
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引用次数: 0
Immobilization strategies, supporting materials, and performance advantages of photocatalysts in ammonia synthesis 氨合成光催化剂的固定化策略、载体材料及性能优势
IF 3.7 3区 工程技术 Q2 ENGINEERING, CHEMICAL Pub Date : 2026-01-01 DOI: 10.1016/j.cjche.2025.10.001
Qian Su , Pengfei Wang , Cheng Zuo , Jinghe Jiang
Photocatalytic nitrogen fixation (PNF) is a promising alternative to the Haber-Bosch process. It achieves green ammonia production by utilizing solar energy for nitrogen fixation under mild conditions. While nanoscale photocatalysts offer enhanced performance due to their high surface area and abundant active sites, their small size makes them difficult to recover and prone to agglomeration. These bottlenecks severely limit industrial application. A promising solution is to immobilize the catalysts onto support surfaces. This paper provides a systematic review of recent advances in the design of immobilized photocatalysts for ammonia synthesis. It begins by outlining the key benefits of immobilization strategies, particularly in improving catalyst stability, recyclability, and overall photocatalytic performance. The working mechanisms and features of various immobilization techniques are then categorized and explained, covering physical adsorption/deposition, chemical bonding, in situ growth, and hybrid physico-chemical methods. Supported materials and common substrate types are also summarized. Furthermore, the widely used configurations of photoreactors suitable for immobilized systems are introduced. Finally, the review identifies current research limitations and challenges, and offers perspectives on future developments in the field of immobilized photocatalysis.
光催化固氮(PNF)是一种很有前途的替代Haber-Bosch法的方法。在温和条件下利用太阳能固氮,实现绿色制氨。纳米级光催化剂由于其高表面积和丰富的活性位点而具有增强的性能,但其小尺寸使其难以回收并且容易团聚。这些瓶颈严重限制了工业应用。一个有希望的解决方案是将催化剂固定在支撑表面上。本文系统地综述了氨合成固定化光催化剂的研究进展。首先概述了固定策略的主要好处,特别是在提高催化剂稳定性,可回收性和整体光催化性能方面。然后对各种固定技术的工作机制和特点进行了分类和解释,包括物理吸附/沉积、化学键合、原位生长和混合物理化学方法。对支撑材料和常见的衬底类型也进行了总结。此外,还介绍了广泛应用于固定化系统的光反应器结构。最后,综述指出了目前研究的局限性和挑战,并对固定化光催化领域的未来发展提出了展望。
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Chinese Journal of Chemical Engineering
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