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

CO2 capture for environmental remediation with hollow fibre membrane: Impact of air gap and bore fluid ratio onto the morphology and performance 利用中空纤维膜捕获二氧化碳用于环境修复：气隙和孔液比对形态和性能的影响

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-09-05 DOI: 10.1002/apj.3157

Muhd Izzudin Fikry Zainuddin, Abdul Latif Ahmad, Meor Muhammad Hafiz Shah Buddin, Mohamad Alif Adnan

{"title":"CO2 capture for environmental remediation with hollow fibre membrane: Impact of air gap and bore fluid ratio onto the morphology and performance","authors":"Muhd Izzudin Fikry Zainuddin, Abdul Latif Ahmad, Meor Muhammad Hafiz Shah Buddin, Mohamad Alif Adnan","doi":"10.1002/apj.3157","DOIUrl":"10.1002/apj.3157","url":null,"abstract":"Hollow fibre membrane (HFM) is favourable for carbon dioxide (CO2) due to its high packing density and high volume to area ratio. In this study, the effect of air gap and bore fluid ratio is explored to study its influence on the morphology and separation performance. With high dope extrusion rate (DER), the shear-induced polymer orientation can be preserved with low air gap which come with the cost of deformed lumen. As such, the coagulant activity of the bore fluid can be reduced by introducing solvent, which in turn reduces rate of phase inversion to prevent sudden contraction of polymer at low air gap, thus allowing proper formation of lumen. With the presence of solvent, the flowability of the dope solution increased due to reduced viscosity as the bore fluid with high solvent content make contact the external coagulant. HFM spun with low air gap with the presence of solvent in the bore fluid shows increased stretched ratio due to the influence of gravitational pull upon being extruded from the spinneret. This in turn improved the polymer chain orientation due to the stretch across the spinning line. Subsequently, HFM spun with 80 wt.% of N-methyl-2-pyrollidone (NMP) in the bore fluid using narrow gap spinneret with 5-cm air gap shows the highest ideal CO2/N2 and CO2/CH4 selectivity at 23.4 and 28 respectively, even though it also exhibit the lowest CO2 permeance at only 3.1 GPU which was ascribed to the formation of dense skin layer. Meanwhile, when HFM was spun with a bigger annulus gap, the ideal CO2/N2 and CO2/CH4 selectivity slightly dropped, however the CO2 permeance exhibit increment.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220334","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

An insight into the investigation of partition characteristics of flow fields based on chaos fractal theory in a jet impingement–negative-pressure reactor 基于混沌分形理论的射流冲击-负压反应器中流场分区特征研究的启示

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-09-03 DOI: 10.1002/apj.3155

Yuxi Hu, Yingying Dong, Guangchao Jiang, Zonghan Li, Fachen Qiu

{"title":"An insight into the investigation of partition characteristics of flow fields based on chaos fractal theory in a jet impingement–negative-pressure reactor","authors":"Yuxi Hu, Yingying Dong, Guangchao Jiang, Zonghan Li, Fachen Qiu","doi":"10.1002/apj.3155","DOIUrl":"10.1002/apj.3155","url":null,"abstract":"The jet impingement–negative-pressure reactor (JI-NPR) is a continuous and efficient technology designed to remove ammonia without clogging. Prior research has discovered that the changing movement of a porous jet impinging under negative-pressure conditions is distinguished by a more pronounced distribution over many regions. This study utilizes the CFD numerical simulation method in conjunction with the MATLAB platform to investigate the fractal characteristics of water phase distribution, velocity, turbulence intensity, vortex amount, and other parameters at various locations. The fractal dimension is employed as a criterion to analyze the chaotic characteristics of this multi-area distribution phenomenon. The study demonstrates that the effectiveness of deamination removal can be enhanced by quantitatively assessing the complex characteristics in the fluid flow using the chaotic fractal theory, which facilitates the identification of the ideal parameter settings. The optimal deamination effect can be achieved in the reactor when the jet velocity is set to 3.45 m/s and the negative pressure is maintained at 20 400 Pa.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220335","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

Fabrication and performance evaluation of polycarbonate/polyvinyl alcohol–titanium dioxide thin-film nanocomposite membranes for water treatment 用于水处理的聚碳酸酯/聚乙烯醇-二氧化钛薄膜纳米复合膜的制作和性能评估

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-09-02 DOI: 10.1002/apj.3150

Arian Samiei, Homayun Khezraqa, Habib Etemadi, Elham Shokri

{"title":"Fabrication and performance evaluation of polycarbonate/polyvinyl alcohol–titanium dioxide thin-film nanocomposite membranes for water treatment","authors":"Arian Samiei, Homayun Khezraqa, Habib Etemadi, Elham Shokri","doi":"10.1002/apj.3150","DOIUrl":"10.1002/apj.3150","url":null,"abstract":"In recent years, there has been growing interest in using polymer nanocomposite membranes as a more advanced method for removing pollutants from water and treating wastewater for various purposes. In this study, thin-film nanocomposite (TFN) membranes of polycarbonate/polyvinyl alcohol–titanium dioxide thin-film (PC/PVA–TiO2) were fabricated by dip-coating a PC substrate in a PVA/TiO2 solution. Various methods, including attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and water contact angle were utilized to assess the structural characteristics of the produced membranes. The PC/PVA thin-film composite (TFC) and PC/PVA–TiO2 TFN membranes were then examined in a submerged membrane system to evaluate their effectiveness in filtering humic acid (HA) under various vacuum transmembrane pressure (0.3 and 0.6 bar) condition. The FTIR-ATR results confirmed the formation of the active layer of PVA/TiO2 nanoparticles (NPs). It was observed that adding 1 wt.% of TiO2 NPs to the active layer of PVA/TiO2 significantly enhanced the water contact angle from 77.5° for PC support to 55.3° for PC/PVA–TiO2 (0.1) TFN membranes. Furthermore, the FE-SEM results confirmed the formation of an active layer of PVA/TiO2 with a thickness of 237.87 nm. The pure water flux increased from 101.64 L/m2h for the PC/PVA TFC membrane to 144.02 L/m2h and 199.09 L/m2h for the PC/PVA–TiO2 (0.05) and PC/PVA–TiO2 (0.1) TFN membranes, respectively. Also, the results revealed that at lower transmembrane pressure, all membranes showed higher value in HA removal as compared to when higher transmembrane pressure was used.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227374","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

Numerical investigation of electromagnetic [Cu + TiO2/H2O]h hybrid nanofluid flow with solar radiation over an exponential stretching surface 指数拉伸表面上太阳辐射电磁[Cu + TiO2/H2O]h 混合纳米流体流动的数值研究

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-30 DOI: 10.1002/apj.3154

Bhumarapu Venkateswarlu, Sang Woo Joo, Nallagundla Nagendra, Ahmed Sayed M Metwally

{"title":"Numerical investigation of electromagnetic [Cu + TiO2/H2O]h hybrid nanofluid flow with solar radiation over an exponential stretching surface","authors":"Bhumarapu Venkateswarlu, Sang Woo Joo, Nallagundla Nagendra, Ahmed Sayed M Metwally","doi":"10.1002/apj.3154","DOIUrl":"10.1002/apj.3154","url":null,"abstract":"The idea of a hybrid nanofluid (HNF) has sparked curiosity among many scientists because of its ability to enhance thermal characteristics, leading to elevated rates of heat transfer (HT). These HNFs are utilized in various engineering and industrial settings, such as electronics cooling, manufacturing, naval structures, biomedical applications, and drug delivery. The current study investigates the analysis of irreversibility in EMHD [Cu + TiO2/H2O]h flow over a stretching sheet with radiation and viscous dissipation. The governing PDEs are converted into ODEs using similarity variables. These ODEs are then solved using the RKF method along with a shooting technique. The effects of different physical parameters on the velocity and temperature distributions of the HNF, as well as on HT and surface drag force, are thoroughly examined and presented in graphs. The velocity of [TiO2/water]n flow declines as the magnetic field strength rises, but it rises with greater electric field values for [Cu + TiO2/water]h. The temperature of the [Cu + TiO2/water]h increases with elevated levels of radiation, Eckert number, and heat generation strength. Higher Reynolds and Brinkman numbers result in a rise in entropy generation for [Cu + TiO2/H2O]h, whereas the Bejan number decreases to the same extent. The HT rate in [Cu + TiO2/H2O]h increases by 3.05% as the Eckert number rises, while it drops by 4.01% when there is significant thermal radiation. Skin friction reduces by 3.21% in [TiO2/water]n as the electric field strength increases, whereas it decreases by 4.05% with an increase in magnetic field strength. These discoveries offer valuable perspectives on furthering the utilization of HNFs in engineering and industrial operations.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220338","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

Preparation and photocatalytic mechanism of magnetic Ag2S/CoFe1.95Dy0.05O4 Z-scheme heterojunction 磁性 Ag2S/CoFe1.95Dy0.05O4 Z 型异质结的制备与光催化机理

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-30 DOI: 10.1002/apj.3153

Liu Qingwang, Xu Mai, Meng Ying

{"title":"Preparation and photocatalytic mechanism of magnetic Ag2S/CoFe1.95Dy0.05O4 Z-scheme heterojunction","authors":"Liu Qingwang, Xu Mai, Meng Ying","doi":"10.1002/apj.3153","DOIUrl":"10.1002/apj.3153","url":null,"abstract":"The synthesis of high-efficiency magnetic composite photocatalyst by doping magnetic cobalt ferrite and compounding single semiconductor photocatalyst is a promising strategy to improve the oxidation ability of photocatalytic systems. In this paper, CoFe1.95Dy0.05O4 (CFDO) was prepared by doping Dy element into magnetic CoFe2O4, and Ag2S (AS)/CFDO with high-efficiency magnetic photocatalyst was synthesized by compounding AS with CFDO as the substrate. The photocatalytic samples were characterized by different advanced characterization methods, and their photocatalytic degradation of methylene blue (MB) was studied. The results show that AS/CFDO exhibits higher visible light response, excellent photogenerated charge separation ability and migration efficiency, and excellent catalytic performance in the catalytic degradation system. The photocatalytic activity of AS/CFDO was the highest, and its photocatalytic degradation kinetic constant K was 2.48 and 1.54 times that of AS and CFDO, respectively. In addition, the catalyst contained in the catalytically contaminated solution can be effectively separated by an external magnetic field to achieve multiple cycles of degradation and recycling. The cyclic degradation experiments showed that AS/CFDO exhibited high degradation stability during the photodegradation process. After the fifth reuse, the degradation efficiency was still more than 88.0%. Finally, the possible photocatalytic mechanism of the samples was discussed. Therefore, this work provides an effective solution for the construction of photocatalysts with high efficiency, magnetic recovery, and cyclic degradation stability and avoids the secondary pollution of catalysts to organic wastewater. It is of great significance to create an environmentally friendly catalytic method for efficient cyclic degradation of organic wastewater.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220339","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

Physicochemical influence of graphite agent for fabrication of MoVTeNbO catalyst for direct oxidation of propene to acrylic acid 石墨剂对制造用于丙烯直接氧化成丙烯酸的 MoVTeNbO 催化剂的物理化学影响

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-29 DOI: 10.1002/apj.3149

Hossein Khosravi Rouzbahani, Azam Akbari, Golshan Mazloom

{"title":"Physicochemical influence of graphite agent for fabrication of MoVTeNbO catalyst for direct oxidation of propene to acrylic acid","authors":"Hossein Khosravi Rouzbahani, Azam Akbari, Golshan Mazloom","doi":"10.1002/apj.3149","DOIUrl":"10.1002/apj.3149","url":null,"abstract":"MoV-based composites stand out as the most promising potential catalysts targeted for direct production of acrylic acid from alkane/alkene substances. Herein, MoVTeNbO powder was synthesized and successfully fabricated by adding graphite as an appropriate tableting agent. Without employing graphite as lubricant, the fabrication of tablets was not practicable. The physicochemical effects of graphite on the catalyst properties were investigated via characterization by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), ammonia temperature-programmed desorption (NH3-TPD), and thermal gravimetric analysis (TGA) methods. In addition to the easy and operative formation of tablets by consisting graphite, TGA results indicated better thermal stability compared to the bare powder. No harmful impact of graphite on the catalyst crystalline phases and morphology was detected by XRD and SEM analysis. The SEM images proved the graphite incorporation as a binder in the physical combination of the catalyst particles along the compression process, resulting in the desired physical resistance. Graphite caused a slight decrease in the BET surface area and final catalyst acidity. Despite the effect of reducing propene conversion, interestingly, a substantial improvement in the yield of acrylic acid was found by tableting. The graphite as an inert agent suppressed hot spots on the catalyst surface, leading to superior consistency in activity over time as well as lower selectivity to undesirable COx.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220361","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

Experimental studies on mechanism whereby premixed chamber length and equivalence ratio collaboratively influence self-excited thermoacoustic instability 预混室长度和等效比共同影响自激热声不稳定性机理的实验研究

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-28 DOI: 10.1002/apj.3145

Yuanhang Zhang, Yongbo Du, Jingkun Zhang, Defu Che

{"title":"Experimental studies on mechanism whereby premixed chamber length and equivalence ratio collaboratively influence self-excited thermoacoustic instability","authors":"Yuanhang Zhang, Yongbo Du, Jingkun Zhang, Defu Che","doi":"10.1002/apj.3145","DOIUrl":"10.1002/apj.3145","url":null,"abstract":"Self-excited thermoacoustic instability (SETAI) is a dangerous phenomenon in combustion equipment. While it is widely acknowledged that SETAI behavior is determined by the couple between pressure and heat release oscillation, their phase difference is difficult to predict, which impedes the development of SETAI control technology. With the aim of passive control technology development, this paper conducted experiment on a premixed hedge combustor to explore the mechanism whereby premixed chamber length (LP) and equivalence ratio (φ) collaboratively influence SETAI behavior. Results showed LP mainly affects the pressure mode shape within premixed chamber and consequently alters the phase difference between pressure and flowrate oscillation at combustion chamber inlet. Changing φ gives rise to different reaction time-lag (τ), thus altering the phase difference between flowrate and reaction heat release oscillation. By introducing this flowrate oscillation, how LP and φ collaboratively determine phase difference between pressure oscillation and heat release oscillation was clarified. The mechanisms identified in this study are consistent with the emerging rationalization of the factors contributing to SETAI, and also provides better understanding on Rayleigh criterion and guidance for SETAI control. With further work on heat release and flow rate measurement, as well as the development on τ description, SETAI can be better predicted and controlled.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"19 6","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220363","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}

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Experimental study on sloshing mechanical characteristics in a partially filled storage tank 部分填充储罐中的荡动机械特性实验研究

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-26 DOI: 10.1002/apj.3152

Peng Zhao, Wenlong Xue, Yunfang Yang, Zhan Liu

引用次数: 0

Estimation of density and viscosity of deep eutectic solvents: Experimental and machine learning approach 估计深共晶溶剂的密度和粘度：实验和机器学习方法

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-23 DOI: 10.1002/apj.3151

Dhruv Patel, Krunal J. Suthar, Hemant Kumar Balsora, Dhara Patel, Swapna Rekha Panda, Nirav Bhavsar

引用次数: 0

Experimental study on the mechanism of nanoparticles improving the stability of high expansion foam 纳米颗粒改善高膨胀泡沫稳定性机理的实验研究

IF 1.4 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-21 DOI: 10.1002/apj.3148

Yixiang Zhang, Shilong Feng, Yuhui Jing, Junhua Bai

{"title":"Experimental study on the mechanism of nanoparticles improving the stability of high expansion foam","authors":"Yixiang Zhang, Shilong Feng, Yuhui Jing, Junhua Bai","doi":"10.1002/apj.3148","DOIUrl":"10.1002/apj.3148","url":null,"abstract":"High expansion (Hi-Ex) foam is recommended to suppress the leakage and diffusion of cryogenic liquid due to its light weight and large volume. However, the disadvantages of low stability and high break rate under environmental conditions are all limited the further application in vapor mitigation and fire extinguishing. So that, this paper focus on the effect and mechanism of nanoparticles in stabilizing Hi-Ex foam. Three kinds of nanoparticles with different concentration were selected to evaluate the effect of foam half-life and the mechanism of particles on improving the foam stability. The results indicated that different particle concentrations can improve the foam stability to a specific extent, and the maximum improving of half-life can increase by 95.4% in the presence of the hydrophilic SiO2 at .5 wt%. Meanwhile, the hydrophilicity, size, and morphology of the particles have a specific impact on the foam stability. The foam expansion rate first increased and then decreased. From the microscopic point of view, the bubble size gradually increases with time by two processes of ripening and coalescence and satisfied in a logarithmic distribution. While, the liquid film thickness remarkably decreases due to foam drainage without particles and the adsorption and accumulation of nanoparticles on foam lamella can provide a spatial barrier for the film thinning and the inter bubble diffusion. Finally, the microscopic interaction mechanism on improving the foam stability has been further explored and revealed in these two aspects.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"19 6","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227375","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