Asia-Pacific Journal of Chemical Engineering最新文献_第2页

Numerical Studies on Phase Change Material–Operated Condenser and Preheater for Energy-Efficient Refrigeration Cycle 节能型制冷循环相变材料冷凝器和预热器的数值研究

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2025-01-27 DOI: 10.1002/apj.3198

Shyam Kumar Rajak, Debasree Ghosh

{"title":"Numerical Studies on Phase Change Material–Operated Condenser and Preheater for Energy-Efficient Refrigeration Cycle","authors":"Shyam Kumar Rajak, Debasree Ghosh","doi":"10.1002/apj.3198","DOIUrl":"https://doi.org/10.1002/apj.3198","url":null,"abstract":"<div>\u0000 \u0000 The study investigates using solid–liquid phase change materials (PCMs) as heat exchangers in energy-efficient refrigeration systems. A modified refrigeration cycle flow model was proposed and progressively refined for better performance. Initial simulations used simplified U-tube flow models to reduce complexity, analyzing PCM charging and discharging separately before integrating them into the modified refrigeration system. Various parameters were examined, including the mass flow rate of refrigerant R134a, inlet temperatures of hot and cold refrigerants, and the heat transfer area. The refrigerant, termed HotR, flows through the condenser, while the cooler refrigerant, ColdR, flows through the preheater. PCM acts as the condenser during charging and as the preheater during discharging. Simulation techniques such as the enthalpy-porosity model for the PCM mushy region, the Lee model for evaporation–condensation, and the volume-of-fluid (VOF) multiphase model were utilized to model the PCM-operated condenser accurately. The study offers valuable insights for optimizing PCM utilization in refrigeration cycles. It emphasizes the importance of refining charging and discharging processes to enhance system efficiency and condensation performance. Simulations showed the need for flow rate adjustments to achieve optimal condensation. Using HotR (343 K) and ColdR (263 K) inlet temperatures and a flow rate of 0.000824 kg/s, the system achieved up to 47% condensation and 25.08 K preheating with the integrated setup.\u0000 </div>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Design of Fractional-Order Sliding Mode Controller for an Unstable Three-State Model Jacketed CSTR 不稳定三态模型夹套CSTR分数阶滑模控制器设计

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2025-01-27 DOI: 10.1002/apj.3195

Parmanand Maurya, Durga Prasad, Ram Sharan Singh

{"title":"Design of Fractional-Order Sliding Mode Controller for an Unstable Three-State Model Jacketed CSTR","authors":"Parmanand Maurya, Durga Prasad, Ram Sharan Singh","doi":"10.1002/apj.3195","DOIUrl":"https://doi.org/10.1002/apj.3195","url":null,"abstract":"<div>\u0000 \u0000 Control of a jacketed continuous stirred tank reactor (CSTR) is challenging due to nonlinear dynamics, complexity, and rapid reactor dynamics under imperfect mixing in the jacket. Current controller designs mainly focus on the two-state model, neglecting the potential of three-state models in scenarios with nonperfect mixing and fast reactor dynamics. This study proposes a sliding mode controller (SMC) design scheme based on the transfer function model using a newly developed jellyfish optimisation algorithm. Further, a fractional-order sliding mode control (FO-SMC) strategy is proposed, which integrates modifications to the SMC to mitigate chattering, enhance control robustness, and provide better disturbance rejection capability. PID and fractional-order PID (FOPID) controllers were also designed for comparative analysis. The simulation results demonstrated that FO-SMC outperformed other designed controllers, shown by a 37.14% reduction in settling time, 10.69% reduction in integral absolute error (IAE), and 19.06% reduction in time-weighted absolute error (ITAE) compared to SMC and various other improved performance indicators. Parameter variation and noise analysis highlighted the ability of the controller to maintain stability and performance under dynamic conditions.\u0000 </div>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Research on the Suppression of Methane Explosion by ZSM-5 Zeolite With Different Si/Al Ratios 不同硅铝比ZSM-5分子筛抑制甲烷爆炸的研究

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2025-01-26 DOI: 10.1002/apj.3188

Siqi Wang, Yongmei Hao, Zhengqi Wu, Fan Wu, Ning Xu

{"title":"Research on the Suppression of Methane Explosion by ZSM-5 Zeolite With Different Si/Al Ratios","authors":"Siqi Wang, Yongmei Hao, Zhengqi Wu, Fan Wu, Ning Xu","doi":"10.1002/apj.3188","DOIUrl":"https://doi.org/10.1002/apj.3188","url":null,"abstract":"<div>\u0000 \u0000 To investigate the impact of single zeolite powder on methane explosion inhibition, a ZSM-5 zeolite with a porous structure was utilized as the raw material and subjected to alkali treatment to obtain the zeolites' powers with varying Si/Al ratios. The modified powders were characterized and analyzed using SEM, XRD, EDS analysis, etc. and compared with unmodified zeolite powders regarding their explosion suppression effects. The results demonstrated that alkali-treated zeolite powders exhibited superior explosion suppression effects, with the optimum effect achieved at the Si/Al ratio of 10.32, reducing the maximum explosion pressure by 84.24% compared to unfilled conditions. In this study, the explosion suppression effect of the explosion suppression powders includes adsorption of gases, barrier effect, and reaction with free radicals in the explosion process. Desilication increased sodium content within the zeolites; however, this content decreased as the silicon-to-aluminum ratio increased due to its capability to capture free radicals generated during explosions and interrupt chain reactions.\u0000 </div>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Investigation on the Regulation Mechanisms of Viscosity–Temperature Characteristics of High Calcium–Iron Coal by Coal Blending 配煤对高钙铁煤粘温特性调节机理的研究

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2025-01-25 DOI: 10.1002/apj.3197

Xuefei Liu, Fenghai Li, Mingjie Ma, Yong Wang, Ziqiang Yang, Yitian Fang

{"title":"Investigation on the Regulation Mechanisms of Viscosity–Temperature Characteristics of High Calcium–Iron Coal by Coal Blending","authors":"Xuefei Liu, Fenghai Li, Mingjie Ma, Yong Wang, Ziqiang Yang, Yitian Fang","doi":"10.1002/apj.3197","DOIUrl":"https://doi.org/10.1002/apj.3197","url":null,"abstract":"<div>\u0000 \u0000 Entrained-flow bed gasification was an important way to realize clean coal conversion. However, the high calcium–iron coal ash had a low flow temperature, low viscosity, and strong fluctuations in viscosity, which severely affected the service life of the gasifier. It was necessary to regulate its ash fusion temperature and viscosity–temperature characteristics (AFV). In the paper, the AFV of Datong coal (DTC, a high calcium–iron coal) and its regulation mechanism were investigated by ash fusion temperature tester, high-temperature viscometer, Raman spectrometer, differential scanning calorimetry, X-ray diffractometer, FactSage software, and activation energy calculation. With the increasing Pingdingshan coal (PDS, a high silicon–aluminum coal) mass ratio, the AFV of DTC mixtures increased, and the viscosity fluctuation of DTC mixtures disappeared gradually. When PDS mass ratio is in the range of 18%–24%, the flow temperature and viscosity of DTC ash were 1375°C–1400°C and 18–22 Pa·s, respectively. The increasing PDS mass ratio, the formation of high melting point anorthite and its increasing content, the polymerization degree of DTC mixed ash increasing, and a gradual increase in activation energy as well as their corresponding crystallization behavior led to the increase in the AFV. The mineral transformations and the position variation in the ternary phase diagram of ash compositions with PDS addition by FactSage calculation also explained the variations in the viscosity–temperature characteristics.\u0000 </div>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Facile Extraction and Salinization of Biotransferred 1,5-Pentanediamine to Produce Purified Nylon 56 Salt 生物转移1,5-戊二胺的快速提取和盐化制备纯化尼龙56盐

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2025-01-24 DOI: 10.1002/apj.3196

Wanshu Huang, Xiaoyue Zhang, Shuo Liu, Bowen Shen, Shengping You, Rongxin Su, Wei Qi, Mengfan Wang

{"title":"Facile Extraction and Salinization of Biotransferred 1,5-Pentanediamine to Produce Purified Nylon 56 Salt","authors":"Wanshu Huang, Xiaoyue Zhang, Shuo Liu, Bowen Shen, Shengping You, Rongxin Su, Wei Qi, Mengfan Wang","doi":"10.1002/apj.3196","DOIUrl":"https://doi.org/10.1002/apj.3196","url":null,"abstract":"<div>\u0000 \u0000 In this study, an extraction and salinization method was developed to treat the biotransferred 1,5-pentanediamine (PDA) to achieve the purification of PDA as well as the production of high-purity Nylon 56 salt. Further analysis showed that the Nylon 56 salt product with 99.6% purity and 95.11 g/L yield could be obtained by mixing 0.4 M n-butanol solution of self-produced PDA and n-butanol solution of commercial adipic acid in an equimolar ratio and reacting for 2 h at 323.15 K, 250 rpm. By comparison, the physical properties, structure, and thermal stability of the Nylon 56 salts produced by this process were basically the same as those of the Nylon 56 salt prepared with commercial technical grade PDA. The Nylon 56 salts were all in the form of short rod-shaped powder with initial polymerization and decomposition temperatures of 458.95 and 487.85 K, respectively. Therefore, this biotransferred PDA extraction–salinization coupling process omitted the distillation and dissolution steps of PDA, and the high-quality Nylon 56 monomer was produced by crystallization in the solution. The process achieves efficient high-purity production of Nylon 56 salt and provides a new idea for solving the problem of preparation and storage and transport safety of high-purity PDA.\u0000 </div>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Separation of Ethanol–Water Azeotrope Using Waste Carrageenan Filter-Cake Adsorbent 废卡拉胶滤饼吸附剂分离乙醇-水共沸物

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2025-01-22 DOI: 10.1002/apj.3194

Dharyl C. Flores, Alvin Mar V. Martin, Shaira Kyle M. Tagalog, Ian Dominic F. Tabañag, Alchris W. Go, Luis K. Cabatingan

{"title":"Separation of Ethanol–Water Azeotrope Using Waste Carrageenan Filter-Cake Adsorbent","authors":"Dharyl C. Flores, Alvin Mar V. Martin, Shaira Kyle M. Tagalog, Ian Dominic F. Tabañag, Alchris W. Go, Luis K. Cabatingan","doi":"10.1002/apj.3194","DOIUrl":"https://doi.org/10.1002/apj.3194","url":null,"abstract":"<div>\u0000 \u0000 The final step in the downstream processing of bioethanol is typically the removal of water from the ethanol–water azeotrope (95.6 wt.% ethanol) to obtain fuel-grade ethanol (> 99 wt.%). This can be done by various techniques including distillation (azeotropic or extractive), membrane-based separation, and adsorption using molecular sieves or bio-based adsorbents. In this work, a waste by-product of carrageenan production is studied for its efficacy as water adsorbent. This waste carrageenan filter-cake (CFC) material is primarily composed of organics (22 wt.% cellulose and carrageenan) and ash (78 wt.% perlite) as inferred from the proximate analysis. The functional groups present in the material were identified by FTIR analyses, and the surface morphology was checked by FESEM. Liquid phase water adsorption isotherms at 30°C, 40°C, and 50°C were established and were found to be adequately described by both Langmuir (R2 = 0.93 to 0.97) and Brouers-Sotolongo (R2 = 0.96 to 0.97) models. An enthalpy change of adsorption of about −17 kJ/mol was computed through the van't Hoff equation. An azeotropic mixture (95.6 wt.% ethanol) was successfully purified to above 99.2 wt.% ethanol in a CFC-packed column. The CFC adsorbent was used in three adsorption–desorption cycles without much loss in capacity. Moreover, the Thomas model adequately described the breakthrough curves.\u0000 </div>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Research progress of CO2 absorbent in postcombustion capture process 燃烧后捕集过程中CO2吸收剂的研究进展

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2025-01-03 DOI: 10.1002/apj.3172

Youkun Gao, Chenjun Ning, Longjie Liu, Yi Ye, Sida Tian, Xinglei Zhao

{"title":"Research progress of CO2 absorbent in postcombustion capture process","authors":"Youkun Gao, Chenjun Ning, Longjie Liu, Yi Ye, Sida Tian, Xinglei Zhao","doi":"10.1002/apj.3172","DOIUrl":"https://doi.org/10.1002/apj.3172","url":null,"abstract":"Excessive emissions of greenhouse gases, particularly carbon dioxide (CO2), are the primary culprits behind the phenomenon of global warming, and reducing CO2 emissions has become the primary global concern for all countries. CO2 capture, utilization, and storage (CCUS) technology is a key strategy in achieving the goals of the dual carbon strategy, and carbon capture is one of the most critical technology links. However, the development of chemical absorbents have been hindered by these problems such as poor absorption rate, low absorption capacity, poor stability, high energy consumption for regeneration, and high recovery cost. Therefore, how to realize the development and industrial application of CO2 chemical absorbents with efficient capture and low energy consumption for regeneration is an extremely severe challenge to be broken through at present. Herein, the current research progress of chemical absorbents is summarized and discussed in depth, which focuses on the absorption mechanism, absorption performance, advantages, and disadvantages of various absorbents. Subsequently, the existing problems and corresponding solutions for the research system are pointed out. Finally, the future development direction of absorbents is prospected.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 2","pages":""},"PeriodicalIF":1.4,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Facile Preparation and Enhanced Visible Light Photocatalytic Performance of AgI/Ag3PO4/WO3·H2O Heterojunction Photocatalysts AgI/Ag3PO4/WO3·H2O异质结光催化剂的制备及增强可见光催化性能

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-12-30 DOI: 10.1002/apj.3193

Jianke Tang, Qiaoling Li, Rongqian Meng, Yanfeng Xue, Shengjian Zhang, Shengjuan Shao

{"title":"Facile Preparation and Enhanced Visible Light Photocatalytic Performance of AgI/Ag3PO4/WO3·H2O Heterojunction Photocatalysts","authors":"Jianke Tang, Qiaoling Li, Rongqian Meng, Yanfeng Xue, Shengjian Zhang, Shengjuan Shao","doi":"10.1002/apj.3193","DOIUrl":"https://doi.org/10.1002/apj.3193","url":null,"abstract":"<div>\u0000 \u0000 Using the prepared Ag3PO4/WO3·H2O composite as the matrix, AgI nanoparticles were introduced onto the surface of Ag3PO4 to construct AgI/Ag3PO4/WO3·H2O ternary heterojunction photocatalysts. The ternary composite photocatalysts exhibited higher photocatalytic degradation activities for rhodamine B (RhB) and tetracycline hydrochloride (TCH) than those of binary Ag3PO4/WO3·H2O and AgI/WO3·H2O photocatalysts and individual AgI, Ag3PO4, and WO3·H2O photocatalysts. After exposure to visible light for 12 and 24 min, the removal efficiencies of RhB and TCH by the S2-50% photocatalyst (50% molar percentage of AgI to Ag3PO4) reached 98.0% and 85.3%, respectively. After four degradation cycles, the removal efficiency of RhB by S2-50% remained at 93.2%, significantly surpassing that of the Ag3PO4/WO3·H2O photocatalyst. The enhanced photocatalytic performance of the AgI/Ag3PO4/WO3·H2O photocatalyst is primarily attributed to the formation of Z-scheme/conventional Type II heterojunctions, which facilitate spatial separation of the photogenerated electrons and holes while maintaining the strong reductive capabilities of electrons in the AgI conduction band.\u0000 </div>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Composite From Superparamagnetic Iron Oxide Nanoparticles and Copper Benzene-1,3,5-Tricarboxylate as Rapidly Regenerated CO2 Adsorbent 超顺磁性氧化铁纳米颗粒与苯-1,3,5-三羧酸铜复合快速再生CO2吸附剂

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-12-30 DOI: 10.1002/apj.3191

Nguyen Thu Phuong, Ha Ngan Giang, Do Thi Hai, Magdalena Osial, Nguyen Hong Nam, Dinh Thi Mai Thanh

{"title":"Composite From Superparamagnetic Iron Oxide Nanoparticles and Copper Benzene-1,3,5-Tricarboxylate as Rapidly Regenerated CO2 Adsorbent","authors":"Nguyen Thu Phuong, Ha Ngan Giang, Do Thi Hai, Magdalena Osial, Nguyen Hong Nam, Dinh Thi Mai Thanh","doi":"10.1002/apj.3191","DOIUrl":"https://doi.org/10.1002/apj.3191","url":null,"abstract":"<div>\u0000 \u0000 Rising global warming concerns drive the demand for cost-effective CO2 capture technologies for industrial reuse. In this study, a novel composite material for CO2 adsorption based on superparamagnetic iron oxide nanoparticles (SPIONs) and copper benzene-1,3,5-tricarboxylate (CuBTC) was proposed by a chronoamperometry electrochemical method. XRD, FT-IR, and SEM–EDX techniques confirmed the presence of SPION and CuBTC in the synthesized composites. SPIONs were small, uniform, and spherical, facilitating their effective combination with CuBTC. Among the synthesized composites, the 1:1 ratio of SPION to CuBTC exhibited the highest CO2 adsorption capacity. Under controlled laboratory conditions (0°C, 1 bar, without the influence of ambient moisture or CO2 diffusion limitations), the SPION/CuBTC 1:1 composite demonstrated a CO2 adsorption capacity of 3.5 mmol/g. Under more realistic conditions (25°C, 1 bar, with the influence of ambient moisture) the SPION/CuBTC 1:1 composite exhibited the highest CO2 adsorption efficiency of 12% (expressed as weigh percentage of dry sorbent). The CO2 adsorption capacity of the composite decreased by more than half when the CO2 concentration dropped from 100% to 15%. The adsorption mechanism is primarily driven by chemical adsorption via surface functional groups and physical adsorption through microcapillary formation and van der Waals interactions, mainly due to CuBTC. The incorporation of SPION in the composite accelerated the CO2 desorption process. The combined magnetic behavior and heat generation results suggest that SPION/CuBTC composites possess enhanced magnetic properties and thermal responses, highlighting their potential for efficient heat-mediated desorption in industrial applications.\u0000 </div>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

The Influence of Air Gap Length on the Characteristics and Performance of Hybrid Polyethersulfone/Cellulose Nanocrystal/Multiwalled Carbon Nanotubes Hollow Fiber Membrane for Humic Acid Removal 气隙长度对聚醚砜/纤维素纳米晶/多壁碳纳米管中空纤维膜去除腐植酸特性和性能的影响

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-12-23 DOI: 10.1002/apj.3187

Nor Azura C. Mahmud, Syed M. Saufi, Mazrul Nizam Abu Seman, Mohd Sobri Takriff, Wei Lun Ang, Mohd Helmi Ab Latiff

{"title":"The Influence of Air Gap Length on the Characteristics and Performance of Hybrid Polyethersulfone/Cellulose Nanocrystal/Multiwalled Carbon Nanotubes Hollow Fiber Membrane for Humic Acid Removal","authors":"Nor Azura C. Mahmud, Syed M. Saufi, Mazrul Nizam Abu Seman, Mohd Sobri Takriff, Wei Lun Ang, Mohd Helmi Ab Latiff","doi":"10.1002/apj.3187","DOIUrl":"https://doi.org/10.1002/apj.3187","url":null,"abstract":"<div>\u0000 \u0000 Ready-made or commercial hollow fiber (HF) membranes have limited performance for removing humic acid (HA) from water streams unless they undergo surface modification. Alternatively, a membrane can be tailor-made specifically for HA removal by developing a new formulation and adjusting its fabrication parameters. In this study, to enhance the performance and antifouling properties of HF membranes, a hybrid membrane was developed by blending polyethersulfone (PES) with cellulose nanocrystals (CNC) and multiwalled carbon nanotubes (MWCNT). The effect of air gap length during the dry–wet spinning process was investigated, ranging from 3 cm to 12 cm, to regulate the properties of the hybrid membrane. The membranes were evaluated in terms of morphology (FESEM and AFM), porosity, and hydrophilicity (contact angle). Water flux, HA rejection, and flux recovery ratio (FRR) were also measured. The air gap length significantly influenced the fiber structure, with the finger-like structure expanding from the outer surface to the center of the fiber as the air gap extended up to 9 cm. This increase in air gap length resulted in a significant reduction in porosity, decreasing from 75.59% to 43.45%, while simultaneously enhancing the contact angle from 78° to 89.60°. The membrane produced at a 9 cm air gap length exhibited the best performance, with a pure water flux of 15.83 LMH, HA rejection over 95%, and a high FRR of 98.78%. The synergistic effect of combining CNC with MWCNT and simply adjusting the air gap distance proves to be an effective approach for preparing custom-made HF membranes for HA removal.\u0000 </div>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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