Asia-Pacific Journal of Chemical Engineering最新文献

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Enhancing the catalytic performance of Cu/ZnO/Al2O3 catalyst in methanol synthesis from biomass‐derived syngas with CeO2, MnO2 and ZrO2 as promoters 以 CeO2、MnO2 和 ZrO2 为促进剂提高 Cu/ZnO/Al2O3 催化剂在生物质合成气合成甲醇中的催化性能
IF 1.4 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-07-14 DOI: 10.1002/apj.3121
S. Simanungkalit, C. O. Okoye, Zhezi Zhang, Junzhi Wu, Dongke Zhang
{"title":"Enhancing the catalytic performance of Cu/ZnO/Al2O3 catalyst in methanol synthesis from biomass‐derived syngas with CeO2, MnO2 and ZrO2 as promoters","authors":"S. Simanungkalit, C. O. Okoye, Zhezi Zhang, Junzhi Wu, Dongke Zhang","doi":"10.1002/apj.3121","DOIUrl":"https://doi.org/10.1002/apj.3121","url":null,"abstract":"The performance of Cu/ZnO/Al2O3 (CZA) catalysts promoted by addition of CeO2, MnO2 or ZrO2 in direct methanol production from unconventional syngas was experimentally investigated. The unconventional syngas used in this study contain 25% H2, 25% CO, 20% CH4, 20% CO2 and 10% N2, representing biomass‐derived syngas cultivated from an industrial wood chips pyrolysis plant. The catalysts were synthesised using co‐precipitation technique and tested for methanol synthesis in a fixed‐bed reactor. The activity test of the catalysts showed that the addition of CeO2 or ZrO2 to the CZA catalyst improved the methanol yield, albeit with lower selectivity, whereas adding MnO2 enhanced methanol selectivity but decreased the methanol yield. ZrO2‐promoted catalyst showed the best‐improved activity and stability. The calcined and spent catalysts were characterised using X‐ray diffraction (XRD), N2 physisorption, N2O chemisorption, hydrogen temperature‐programmed reduction (H2‐TPR) and X‐ray photoelectron spectroscopy (XPS). The characterisation results indicate that the catalytic activity is dependent on Cu dispersion, Cu‐active surface area, the catalyst reducibility, Brunauer–Emmett–Teller (BET) surface area and the Cu0/Cu+ ratio. In contrast, catalyst stability was related to the proportion of Cu+ among all surface Cu species.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141649670","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
Correction of the cracking mechanism ratio in catalytic cracking process to characterize the thermal cracking reaction and realize highly sensitive identification of catalysts 修正催化裂化过程中的裂化机理比,以表征热裂化反应并实现催化剂的高灵敏度鉴定
IF 1.4 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-07-14 DOI: 10.1002/apj.3123
Di Li, Xiaojun Dai, Baozhen Shi
{"title":"Correction of the cracking mechanism ratio in catalytic cracking process to characterize the thermal cracking reaction and realize highly sensitive identification of catalysts","authors":"Di Li, Xiaojun Dai, Baozhen Shi","doi":"10.1002/apj.3123","DOIUrl":"https://doi.org/10.1002/apj.3123","url":null,"abstract":"In this work, we have specially carried out the catalytic cracking experiments of heavy distillate oil in the high temperature range of 500~700°C. The composition of dry gas generated in the catalytic cracking process was analyzed, with emphasis on the variation of yield of C1 and C2 products. Two cracking mechanism ratios (CMRs) were redefined by replacing the (C1 + C2) products in the traditional definition of CMR with CH4, and the feasibility of using them to characterize the thermal cracking reaction in the catalytic cracking process in the high temperature range was investigated. The results showed that CH4 was more sensitive to temperature than (C1 + C2) and it was feasible and more accurate to use CH4 instead of (C1 + C2) corrected R3 to characterize the thermal cracking reaction in the catalytic cracking process in the high temperature range. In addition, it was found that the corrected R3 had the effect of distinguishing and identifying catalysts.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141649671","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
Removal of thiophene compounds from model fuel with supported copper on active carbon, adsorption kinetics, and isotherms 用活性炭上的支撑铜去除模型燃料中的噻吩化合物、吸附动力学和等温线
IF 1.8 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-06-11 DOI: 10.1002/apj.3110
Bahador Kazemi, Haleh Golipour, M. Mafi, B. Mokhtarani
{"title":"Removal of thiophene compounds from model fuel with supported copper on active carbon, adsorption kinetics, and isotherms","authors":"Bahador Kazemi, Haleh Golipour, M. Mafi, B. Mokhtarani","doi":"10.1002/apj.3110","DOIUrl":"https://doi.org/10.1002/apj.3110","url":null,"abstract":"In this study, the adsorption of thiophene compounds (TCs), including thiophene (T), benzothiophene (BT), and dibenzothiophene (DBT), from model fuels was investigated using modified activated carbon (AC). The model fuel, prepared as a single‐solute model at a concentration of 2000 ppm based on a mixture concentration of 3000 ppm, served as the basis for the adsorption experiments. Additionally, an examination of thiophene adsorption from commercial fuels, specifically kerosene, was conducted. Experimental data were used to calculate correlated parameters of adsorption isotherms, kinetic models, and the Fisher factor. The pseudo‐second‐order model demonstrated the best fit to the experimental data. Notably, the adsorbent consisting of 10% Cu+ supported on acid‐washed activated carbon (A1CN10) exhibited the highest adsorption capacity for TCs, achieving removal percentages of 78%, 96%, and 100% for T, BT, and DBT, respectively. Various methods were employed to investigate the physicochemical properties of the adsorbents, including N2 adsorption–desorption surface analysis (BET), scanning electron microscopy (SEM), X‐ray diffraction (XRD), and energy dispersive spectroscopy (EDS). Furthermore, the regeneration of the adsorbent was studied using two techniques: agitation and ultrasound.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359889","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
Structure and composition of mesophase pitch prepared from aromatic‐rich fluid catalytic cracking slurry under different process conditions 不同工艺条件下富芳烃流体催化裂化浆料制备的介相沥青的结构和组成
IF 1.8 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-06-07 DOI: 10.1002/apj.3108
Tao Yu, Yu Ma, Xiaoyan Yu, Muhammad Riwan, Mingzhi Wang, Xiaolong Zhou
{"title":"Structure and composition of mesophase pitch prepared from aromatic‐rich fluid catalytic cracking slurry under different process conditions","authors":"Tao Yu, Yu Ma, Xiaoyan Yu, Muhammad Riwan, Mingzhi Wang, Xiaolong Zhou","doi":"10.1002/apj.3108","DOIUrl":"https://doi.org/10.1002/apj.3108","url":null,"abstract":"The high aromaticity of fluidized catalytic cracking (FCC) slurry makes it a superior raw material for the production of high‐performance carbon materials. In this study, direct thermal polycondensation of aromatic‐rich FCC slurries is conducted to synthesize mesophase pitches with a significant anisotropic content. The effects of stirring speed and the pressurized‐atmospheric two‐stage reaction on the structure and composition of the products are investigated. Thermal stability analysis using thermogravimetric (TG) test, observation of mesophase content and optical structure through polarized light microscopy, characterization of material composition and molecular structure via Fourier transform infrared spectroscopy (FT‐IR) and nuclear magnetic resonance hydrogen spectrum (1H NMR), as well as comparison of crystal structures using X‐ray diffraction (XRD) are performed. The experimental results demonstrate that an increase in the stirring rate leads to a more homogeneous molecular distribution within the reaction system, thereby facilitating molecular contact polycondensation and promoting mesophase growth and development. Furthermore, the pressurized‐atmospheric two‐stage reaction process also contributes to mesophase development, resulting in products with more cycloalkane structure, improved thermal stability, and optimized optical structure transitioning from mosaic to flow or even domain.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141373853","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
Synthesis and characterization of mixed matrix membranes with graphene oxide‐impregnated zeolitic imidazolate framework‐8 for enhanced CO2/CH4 separation 氧化石墨烯浸渍沸石咪唑酸盐框架-8 混合基质膜的合成与表征,用于增强 CO2/CH4 分离效果
IF 1.8 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-05-22 DOI: 10.1002/apj.3094
Ajay V. Gawali, Surendra Sasikumar Jampa, Manish Kumar Sinha
{"title":"Synthesis and characterization of mixed matrix membranes with graphene oxide‐impregnated zeolitic imidazolate framework‐8 for enhanced CO2/CH4 separation","authors":"Ajay V. Gawali, Surendra Sasikumar Jampa, Manish Kumar Sinha","doi":"10.1002/apj.3094","DOIUrl":"https://doi.org/10.1002/apj.3094","url":null,"abstract":"For the in situ growth method, the reaction time is important because increasing the reaction time may make it possible for the crystallized ZIF‐8 to fully cover the GO sheets; the excess of ZIF‐8 particles reduces the aspect ratio of the GO sheet. The reaction time will significantly change the morphology, affecting the composite's ability to absorb selective gas and, in turn, affect the gas selectivity. The present work identifies the reaction time for in situ growth of ZIF‐8 nanoparticles on GO sheets. The composite was synthesized at different reaction times of 2, 4, 6, and 8 h and incorporated into the PSF matrix. The fabricated membranes were characterized by FTIR, TGA, SEM, and XRD. The novel synthesized reaction time (6 h) was identified for better enhancement of CO2/CH4 separation. For pure gas studies, the results investigated that the CO2 permeability and CO2/CH4 selectivity were increased by 223% and 98%, respectively, compared with plain PSF membrane. In mixed gas (CO2/CH4) studies, the CO2 permeability and CO2CH4 selectivity were increased by 349% and 854%, respectively, compared with plain PSF membrane. Hence, the in situ growth method helps synthesize MOF@GO composites in the application of gas separation.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141109959","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
Selective adsorption and separation of salicylic acid and 4‐hydroxyisophthalic acid from industry‐grade 4‐hydroxybenzoic acid on UiO‐66 在 UiO-66 上选择性吸附和分离工业级对羟基苯甲酸中的水杨酸和对羟基间苯二甲酸
IF 1.8 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-05-22 DOI: 10.1002/apj.3103
Kai Yuan, Ye Sun, Yangfeng Peng, Yongming Wei, Yanyang Wu, Quan He
{"title":"Selective adsorption and separation of salicylic acid and 4‐hydroxyisophthalic acid from industry‐grade 4‐hydroxybenzoic acid on UiO‐66","authors":"Kai Yuan, Ye Sun, Yangfeng Peng, Yongming Wei, Yanyang Wu, Quan He","doi":"10.1002/apj.3103","DOIUrl":"https://doi.org/10.1002/apj.3103","url":null,"abstract":"In this study, UiO‐66 was employed for the first time as an adsorbent to separate phenolic acid analogues, specifically 4‐hydroxyisophthalic acid and salicylic acid, from impurities. Synthesized in‐house, UiO‐66 was shown to exhibit high selectivity towards 4‐HIPA/4‐HBA and SA/4‐HBA when a molar equivalent of acetic acid modulator to terephthalic acid was set at 44. The adsorption capacities for 4‐HBA, 4‐HIPA, and SA were determined to be 56.34, 55.02, and 60.34 mg/g, respectively. Furthermore, it was observed that after six regeneration cycles, the adsorption capacity for 4‐HBA remained nearly unchanged, whereas those for 4‐HIPA and SA decreased by 5.6% and 2.6%, respectively. FTIR and XPS analyses revealed that all three compounds were adsorbed at the same dominant Zr cluster site on UiO‐66, primarily through hydrogen bonding and electrostatic interaction. Dynamic adsorption experiments revealed that 4‐HBA was the first to elute, maintaining the residual contents of 4‐HIPA and SA below 0.1 wt%. Compared to traditional separation techniques, this paper provided a simple and effective method to purify industrial grade 4‐hydroxybenzoic acid.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141112628","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 multi-stage gasification process of low-rank coal samples from gravity separation process 低阶煤样的多级气化重力分离过程
IF 1.4 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-05-02 DOI: 10.1002/apj.3089
Thuan Duc Mai, Emese Sebe, Tamás Koós, András Arnold Kállay
{"title":"The multi-stage gasification process of low-rank coal samples from gravity separation process","authors":"Thuan Duc Mai,&nbsp;Emese Sebe,&nbsp;Tamás Koós,&nbsp;András Arnold Kállay","doi":"10.1002/apj.3089","DOIUrl":"10.1002/apj.3089","url":null,"abstract":"<p>The separation process is a well-established method for beneficiation technologies of low-rank coal, especially in the case of utilization in the thermochemical processes. In this study, three coal samples, including the original low-rank coal sample and two coal samples (C1 and C2) from the gravity separation process of the original coal sample, were gasified in a multi-stage gasification process at the gasification temperature of 900°C and the steam-to-carbon (S/C) ratio of 1.00 and 1.25. The separation process led to a significant improvement in the quality of coal samples. This improvement is particularly characterized by a higher carbon and volatile fractions and a lower ash content compared with the original coal. This could be the main reason for the higher gasification performance in the case of the experiment of C1 and C2 coal samples. The volume of syngas obtained from gasification experiments of C1 and C2 samples increased between 1.3 and 1.5 times that of the original coal sample. At all S/C ratios and 900°C, the gasification experiment of the C2 sample produced the highest produced gas yield followed by the gasification experiment of the C1 sample. From the chemical point of view, the produced gas had an H<sub>2</sub>/CO ratio close to the desired ratio of 2.00, which is suitable for chemical synthesis processes. In the case of C1 sample experiments, the H<sub>2</sub>/CO ratios were 2.11 and 2.18 at S/C ratios of 1.00 and 1.25, respectively. For the experiments of the C2 sample, the H<sub>2</sub>/CO ratio reached 1.88 and 2.00 at S/C ratios of 1.00 and 1.25, respectively.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140826974","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
Degumming and bleaching process troubleshooting in a palm oil refining process using fuzzy expert system with thematic analysis 利用专题分析模糊专家系统排除棕榈油精炼过程中的脱胶和漂白工艺故障
IF 1.4 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-04-30 DOI: 10.1002/apj.3084
Nur Syuhada Mohd Ali, Intan Suhairi Salleh, Nurul Sulaiha Sulaiman, Tengku Zulaikha Malim-Busu, Hishamuddin Jamaluddin, Mohd Fauzi Othman, Shahrum Shah Abdullah, Khairiyah Mohd-Yusof
{"title":"Degumming and bleaching process troubleshooting in a palm oil refining process using fuzzy expert system with thematic analysis","authors":"Nur Syuhada Mohd Ali,&nbsp;Intan Suhairi Salleh,&nbsp;Nurul Sulaiha Sulaiman,&nbsp;Tengku Zulaikha Malim-Busu,&nbsp;Hishamuddin Jamaluddin,&nbsp;Mohd Fauzi Othman,&nbsp;Shahrum Shah Abdullah,&nbsp;Khairiyah Mohd-Yusof","doi":"10.1002/apj.3084","DOIUrl":"10.1002/apj.3084","url":null,"abstract":"<p>Degumming and bleaching are critical steps in the palm oil refining process, as they are the precursors to the qualities of refined, bleached, and deodorized palm oil. In practice, plant operators often face oil rejections in these processes and solve the problem by trial and error. Hence, a fuzzy expert system is developed to troubleshoot the degumming and bleaching process, for identifying failures and suggesting actions. However, developing the knowledge base and inference engine in the fuzzy expert system for troubleshooting the degumming and bleaching process is challenging because the data in the actual palm oil refining process are poorly documented and must be obtained from various sources, including field observation, document analysis, and interviews, and need to be analyzed using thematic analysis. The results from the thematic analysis were represented as input and output variables of the fuzzy expert system. The developed fuzzy expert system is tested and validated against different data sets and industrial data to identify faults and suggest necessary actions. To evaluate the robustness of the troubleshooting system, the membership functions of the fuzzy expert system are adjusted based on the distributed control system (DCS). The results show that the troubleshooting system can effectively diagnose potential faults and provide necessary actions and can serve as a useful guidance for failures in the degumming and bleaching process.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140826989","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
Structural elucidation of ternary mixtures of L-valine/glycyl-L-valine and water + 1-decyl-3-methylimidazolium bromide: Apparent molar properties at infinite dilution and expansivities L-缬氨酸/甘氨酰-L-缬氨酸和水+1-癸基-3-甲基溴化咪唑鎓三元混合物的结构解析:无限稀释时的表观摩尔特性和膨胀率
IF 1.4 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-04-30 DOI: 10.1002/apj.3086
Ravinder Sharma, Indra Bahadur, Lebogang Katata-Seru, Faruq Mohammad, Shailendra Kumar Singh, Prashant Singh, Vibha Kumar
{"title":"Structural elucidation of ternary mixtures of L-valine/glycyl-L-valine and water + 1-decyl-3-methylimidazolium bromide: Apparent molar properties at infinite dilution and expansivities","authors":"Ravinder Sharma,&nbsp;Indra Bahadur,&nbsp;Lebogang Katata-Seru,&nbsp;Faruq Mohammad,&nbsp;Shailendra Kumar Singh,&nbsp;Prashant Singh,&nbsp;Vibha Kumar","doi":"10.1002/apj.3086","DOIUrl":"10.1002/apj.3086","url":null,"abstract":"<p>This work comprises ternary systems of water + SAIL,1-decyl-3-methylimidazolium bromide, and (S)-2-Amino-3-methylbutanoic acid generally identified as L-valine/ (S)-2-(2-Aminoacetamido)-3-methylbutanoic acid usually described as glycyl-L-valine, densities, and sound speed data have been computed at four operating temperatures, i.e., 288.15 to 318.15 K. Calculated density data have utilized for calculation of various thermodynamic parameters like <i>V</i><sub><i>ϕ</i></sub> (apparent molar volume), \u0000<span></span><math>\u0000 <msubsup>\u0000 <mi>V</mi>\u0000 <mi>ϕ</mi>\u0000 <mn>0</mn>\u0000 </msubsup></math> (apparent molar volumes at infinite dilution), and calculated speed of sound statistics used to determine <i>K</i><sub><i>ϕ,s</i></sub> (apparent molar isentropic compression), <i>K</i><sub><i>s</i></sub> (partial molar isentropic compression at infinite dilution). In our systems, the hydrophilic-ionic interactions that are produced by co-sphere overlap models are predominant. The Hepler's constant is used to analyze the solute's capacity to create or destroy solvent structures. The interaction parameter is computed using the McMillan-Mayer theory. Understanding structure-making, solvation characteristics, and numerous modifications in the ternary system of L-valine/Glycyl-L-valine, water, and [C<sub>10</sub>MIm] [Br] is aided by a variety of thermodynamic factors.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apj.3086","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140827014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of negatively and positively charged thin-film nanocomposite membranes for boron removal 带负电和带正电的纳米复合薄膜除硼效果比较
IF 1.4 4区 工程技术
Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-04-27 DOI: 10.1002/apj.3077
Lee Wei Poh, Nurul Hazirah Hasnol, Syed M. Saufi
{"title":"Comparison of negatively and positively charged thin-film nanocomposite membranes for boron removal","authors":"Lee Wei Poh,&nbsp;Nurul Hazirah Hasnol,&nbsp;Syed M. Saufi","doi":"10.1002/apj.3077","DOIUrl":"10.1002/apj.3077","url":null,"abstract":"<p>The increasing demand for boron has resulted in its contamination of water supplies. Nanofiltration membranes, particularly thin-film nanocomposite (TFN) membranes, have shown promise in removing contaminants. This study evaluated the boron removal capabilities of negatively and positively charged TFN membranes alongside a control thin-film composite (TFC) membrane without nanoparticles. Piperazine (PIP, for negatively charged membrane) or polyethyleneimine (PEI, for positively charged membrane) aqueous monomer was reacted with trimesoyl chloride (TMC) in n-hexane solution via interfacial polymerization (IP) on the polyethersulfone (PES) membrane substrate to form the TFC membrane. During the TFN membrane preparation, titanium dioxide (TiO₂) and sulfocalix[4]arene (SCA4) were introduced as active nanoparticles to the aqueous monomer. Boron removal performance was evaluated using a 10 ppm aqueous boron solution. The PES substrate gave the highest water flux, which was 307.80 LMH. For the TFC membrane, TFC–PIP had a higher water flux at 113.71 LMH than TFC–PEI. Furthermore, the TFN membranes containing the PEI monomer had a lower water flux than those containing the PIP monomer. These findings highlight the potential of TFN membranes, particularly those incorporating nanoparticles, for effective boron removal. Further research and optimization of TFN membranes can contribute to addressing the challenge of boron contamination in water supplies.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140806158","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
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