Asia-Pacific Journal of Chemical Engineering最新文献_第5页

Promoted catalytic performance of sugarcane bagasse ash supported by γ-alumina as efficient, stable, and ecofriendly catalyst for dehydration of methanol to dimethyl ether 以γ-氧化铝为载体的甘蔗渣灰作为高效、稳定和生态友好型催化剂，促进甲醇脱水制二甲醚的催化性能

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-03 DOI: 10.1002/apj.3053

Abd El-Aziz A. Said, Mohamed N. Goda, Mohamed M. M. Abd El-Wahab, Nadia O. El-Gamal, Mohamed Abd El-Aal

{"title":"Promoted catalytic performance of sugarcane bagasse ash supported by γ-alumina as efficient, stable, and ecofriendly catalyst for dehydration of methanol to dimethyl ether","authors":"Abd El-Aziz A. Said, Mohamed N. Goda, Mohamed M. M. Abd El-Wahab, Nadia O. El-Gamal, Mohamed Abd El-Aal","doi":"10.1002/apj.3053","DOIUrl":"10.1002/apj.3053","url":null,"abstract":"The aim of this study was to use different proportions (1% to 20% by weight) of γ-alumina to modify sugarcane bagasse ash (SCBA) for the production of dimethyl ether (DME) through the dehydration of methyl alcohol. A simple precipitation method was utilized to fabricate (1–20 wt.%) Al2O3/SCBA catalysts. X-ray fluorescence, X-ray diffraction, Fourier-transform infrared spectroscopy, transmission electron microscopy, and N2 sorption were used to explore the structural, spectroscopic, morphological, and textural features. The XRD pattern of Al2O3/SCBA catalysts showed a new peak that corresponded to the formation of γ-Al2O3. In addition, the average crystallite sizes of pure SCBA and 10% and 20%Al2O3/SCBA catalysts were calculated and found to be 20.1, 21.6, and 22.6 nm, respectively. To evaluate the acidity of these catalysts, the dehydration of isopropyl alcohol and the chemisorption of basic probe molecules were employed. The acidity test results displayed that these catalysts have weak to moderate acidic sites. The 10% Al2O3/SCBA catalyst calcined at 400°C showed high efficiency for the conversion of methyl alcohol to DME, attaining 89% conversion with 100% selectivity. This observation can be attributed to the even distribution of active sites and the acid–base equilibrium on the surface. Moreover, its catalytic activity and selectivity remain unchanged over a continuous 2-week operation without coke formation, demonstrating its extremely high stability. A strong correlation was observed between the catalytic activity and both the surface area and acidity of the catalysts.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140025427","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 of hollow carbon nanospheres from oxidation of spent tyre oil-derived carbon black in air 在空气中氧化废轮胎油衍生炭黑制备空心纳米炭球

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-03-03 DOI: 10.1002/apj.3054

Chiemeka Onyeka Okoye, Zhezi Zhang, Dongke Zhang

{"title":"Preparation of hollow carbon nanospheres from oxidation of spent tyre oil-derived carbon black in air","authors":"Chiemeka Onyeka Okoye, Zhezi Zhang, Dongke Zhang","doi":"10.1002/apj.3054","DOIUrl":"10.1002/apj.3054","url":null,"abstract":"Hollow carbon nanospheres (HCNS) were prepared from carbon black (CB) derived from spent tyre pyrolysis oil. The pristine CB produced by partial oxidation of the pyrolysis oil in a drop tube furnace was subsequently oxidised in air in a fixed bed reactor to yield HCNS. The effect of oxidation temperature (300 to 700°C) and time (1 to 8 h) on the burn-off (Bt) of the sample over the duration (t) of oxidation and average reaction rate (Rt) was assessed. The BET surface area and pore volume and the nanostructure of the HCNS samples obtained were characterised using N2 adsorption–desorption and high-resolution transmission electron microscope (HRTEM) techniques, respectively. Higher temperature and longer oxidation time led to higher Bt. As Bt increased, the BET surface area and pore volume initially increased linearly due to the removal of the amorphous core and then decreased because of the collapse of the shell of the carbon nanostructure. At Bt of ~56%, the maximum BET surface area and pore volume of the HCNS were 383.2 m2 g−1 and 0.39 cm3 g−1, respectively, compared to ~19.5 m2 g−1 and 0.033 cm3 g−1 of the pristine CB. The HRTEM images indicate that the change in BET surface area corresponds to the formation of the HCNS, as the core of the CB particle was preferentially consumed to create a hollow structure. The formation of HCNS follows an internal oxidation model, which is characterised by rapid core consumption and relatively slow shell consumption.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apj.3054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140036794","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

Three-dimensional simulation of dripping and jetting phenomenon in a flow-focusing geometry 流动聚焦几何体中滴落和喷射现象的三维模拟

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-02-27 DOI: 10.1002/apj.3051

Saikat Biswas, Partho S. G. Pattader, Tapas K. Mandal

{"title":"Three-dimensional simulation of dripping and jetting phenomenon in a flow-focusing geometry","authors":"Saikat Biswas, Partho S. G. Pattader, Tapas K. Mandal","doi":"10.1002/apj.3051","DOIUrl":"10.1002/apj.3051","url":null,"abstract":"3D simulations have been achieved on a flow-focusing geometry employing the VOF method to study the consequence of viscosity, surface tension, wettability, and geometry on drop generation for the dripping regime. Here the dispersed phase is the PDMS oil (polydimethylsiloxane), and the continuous phase is the water. Simulations were performed at different oil-to-water viscosity ratios \u0000<math>\u0000 <mfenced>\u0000 <mfrac>\u0000 <msub>\u0000 <mi>μ</mi>\u0000 <mi>o</mi>\u0000 </msub>\u0000 <msub>\u0000 <mi>μ</mi>\u0000 <mi>w</mi>\u0000 </msub>\u0000 </mfrac>\u0000 </mfenced></math> of 3, 12, 27, and 50. The interfacial tension between PDMS oil and water is 0.0118 N/m. It has been abridged to 0.008 N/m, 0.005 N/m, and 0.002 N/m, and simulations were performed. The walls of the microchannel are considered to be PMMA surfaces. The contact angle of an oil droplet on the PMMA surface in the presence of water is 140°. The effect of wettability was shown at various contact angles (angle created by water droplet on the PMMA surface in the presence of oil) of 0°, 40°, 90°, 135° and 180°. The frequency of droplet generation (1/s), non-dimensional droplet length (L/Wc), droplet volume (nl), and droplet velocity (m/s) have been calculated for each of the cases. A flow pattern map has been industrialized classifying the dripping and jetting regimes. A comparison between normal geometry and two constricted geometries (having different orifice lengths) based on the frequency of droplet, non-dimensional drop length, drop volume, and drop velocity has been made for both dripping and jetting regimes. Prediction of simulated non-dimensional droplet length has also been made using dimensional analysis.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139988024","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 production of bacterial cellulose from coconut water and its application as a green photocatalyst composite membrane 从椰子水中生产细菌纤维素及其作为绿色光催化剂复合膜的应用

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-02-26 DOI: 10.1002/apj.3052

Tintin Mutiara, Ajeng Catra Jingga, Amanda Zulfa Widya

{"title":"The production of bacterial cellulose from coconut water and its application as a green photocatalyst composite membrane","authors":"Tintin Mutiara, Ajeng Catra Jingga, Amanda Zulfa Widya","doi":"10.1002/apj.3052","DOIUrl":"10.1002/apj.3052","url":null,"abstract":"In this research work, bacterial cellulose was produced from the fermentation of coconut water and incubated for 4, 5, and 6 days. The bacterial cellulose membrane was utilized as immobilized silver nanoparticles (AgNPs). A green photocatalyst membrane was prepared by reducing silver ions in the bacterial cellulose matrix structure using local fruit extracts, tomatoes, Citrus hystrix fruit, and mangosteen peel as a reducing agent. The composite was dried in the oven to obtain a more durable fixed structure. The properties of produced bacterial cellulose were determined by measuring the thickness, water retention capacity (WRC), cellulose content, and swelling. The functional group and crystallinity index of bacterial cellulose were observed by FTIR and XRD instrument analysis. The SEM EDX analysis confirms that the silver ions were successfully reduced in the BC matrix, and the UV–Vis spectrum showed that the composite membrane has the ability to degrade the methylene blue solution under sunlight irradiation. The maximum degradation efficiency of the composite membrane against 5 ppm methylene blue solution was achieved by the composite membrane reduced by tomatoes, with a value of 93%. This result proved that the composite membrane produced in this research has excellent capabilities as a green photocatalyst for degrading wastewater containing dye pollutants.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139987986","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

Effects of coal gangue on the ash initial deformation temperature and gasification characteristic of biomass 煤矸石对生物质灰分初始变形温度和气化特性的影响

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-02-25 DOI: 10.1002/apj.3050

Hongli Fan, Fenghai Li, Mingxi Guo, Guopeng Han, Qianqian Guo, Meiling Xu

{"title":"Effects of coal gangue on the ash initial deformation temperature and gasification characteristic of biomass","authors":"Hongli Fan, Fenghai Li, Mingxi Guo, Guopeng Han, Qianqian Guo, Meiling Xu","doi":"10.1002/apj.3050","DOIUrl":"10.1002/apj.3050","url":null,"abstract":"The effects of coal gangue (CG) on the ash initial deformation temperature (IDT) and CO2 gasification characteristic of biomass (chestnut shell [CS] and soybean straw [SS]) were investigated by ash fusion tester and thermogravimetric analyzer, respectively. The IDTs of CS and SS ashes were low because of the presence of abundant low melting point (MP) airchildite (K2Ca(CO3)2) and arcanite (K2SO4), and they were efficiently improved by the CG additions of 2%–10% mass ratios. The increases in the IDTs of CS and SS ashes were resulted from the conversions of fairchildite and arcanite into high MP K-Al silicates (kalsilite [KAlSiO4], leucite [KAlSi2O6], etc.). The gasification reactivities of CS/CG mixtures stayed below that of CS, and they decreased with increasing CG mass ratios (4%–10%) and increased with increasing temperatures (900–1000°C). At 900°C, CG addition caused a decrease in the gasification reactivity of SS. When the temperature reached 950°C, the CG addition of 4% mass ratio increased the gasification reactivity of SS instead. The synergistic effect between biomass and CG during cogasification was more significant at low CG mass ratio and high temperature, and the synergistic effect between SS and CG was more intense than that between CS and CG.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139968670","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

Density and viscosity of deep eutectic solvents at different temperatures and compositions: Measurement and prediction model 不同温度和成分下深共晶溶剂的密度和粘度：测量和预测模型

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-02-21 DOI: 10.1002/apj.3035

Haiou Wang, Yinuo Wang, Shizhuo Wang, Hongjuan Li, Sheng Peng, Yatao Wang, Hao Li, Jing Fang

{"title":"Density and viscosity of deep eutectic solvents at different temperatures and compositions: Measurement and prediction model","authors":"Haiou Wang, Yinuo Wang, Shizhuo Wang, Hongjuan Li, Sheng Peng, Yatao Wang, Hao Li, Jing Fang","doi":"10.1002/apj.3035","DOIUrl":"10.1002/apj.3035","url":null,"abstract":"Deep eutectic solvents (DESs) are becoming increasingly promising as environmentally friendly solvents, and accurate prediction of their density and viscosity is crucial for their successful industrial application. However, existing density and viscosity prediction models primarily rely on temperature variations and often overlook changes in the molar ratio of hydrogen bond acceptors (HBA) to hydrogen bond donors (HBD) in DESs, limiting their practicality. Therefore, in this study, several binary and ternary DESs were synthesized using choline chloride (ChCl) as the hydrogen bond donor. The densities and viscosities of these DESs were measured, and prediction models for the density and viscosity of DESs based on temperature and molar ratio were developed. These models were used to forecast the density and viscosity of DESs at different temperatures and molar ratios. The model parameters are calibrated using experimental data from this research. Finally, the model is utilized to predict the density and viscosity of DESs mentioned in this paper, as well as DESs with varying HBAs and HBDs. The results demonstrate that the discrepancy between the literature value, experimental value, and calculated value is less than 6%, confirming the universal applicability and reliability of the prediction model proposed in this study.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139956242","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

Enhancement in kerosene droplet–coal particle collision and adsorption by bubble trailing vortex in coal slurry conditioning: Energy evolution of collision process 煤泥调节过程中气泡尾随涡流对煤油液滴-煤颗粒碰撞和吸附的增强作用：碰撞过程的能量演变

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-02-20 DOI: 10.1002/apj.3039

Hongzheng Zhu, Zhiqian Qin, Kun Chen, Wenliang Zhu, Qinghui Shi, Ming Yang, Chao Li, Yong Zhang

{"title":"Enhancement in kerosene droplet–coal particle collision and adsorption by bubble trailing vortex in coal slurry conditioning: Energy evolution of collision process","authors":"Hongzheng Zhu, Zhiqian Qin, Kun Chen, Wenliang Zhu, Qinghui Shi, Ming Yang, Chao Li, Yong Zhang","doi":"10.1002/apj.3039","DOIUrl":"10.1002/apj.3039","url":null,"abstract":"Understanding the collision between kerosene droplets and coal particles in the bubble trailing vortex region is crucial for enhancing slurry conditioning. We found the area of the bubble trailing vortex region increased as the bubble size increased via the Fluent 6.3.26 software. A kerosene droplet velocity range of 0.074–0.106 m/s and a coal particle velocity range of 0.062–0.104 m/s were obtained if a bubble had a diameter of 0.3 mm. We employed a high-speed motion acquisition system and observed the collision process, which was divided into two stages: Compression and Rebound. The critical motion distance increased as the kerosene droplet size increased, and sufficient kerosene droplet motion distance and enough kinetic energy normally resulted in a rebound phenomenon. The attenuation energy was almost positively linear to the initial energy, and the energy attenuation coefficient of the collision process was fitted to 0.626. Our results can provide valuable insight into mineral separation.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139917965","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

Study on the equilibrium constants and initial formation temperature of NH4HSO4 and (NH4)2SO4 in coal-fired flue gas 燃煤烟气中 NH4HSO4 和 (NH4)2SO4 的平衡常数和初始形成温度研究

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-02-15 DOI: 10.1002/apj.3049

Xinfeng Yu, Zhuo Chen, Wentao Du, Rongyu Shao, Hao Zhou

引用次数: 0

Cu-modified Fe-Mn magnetic mercury adsorbent and anti-SO2 characteristic 铜改性铁锰磁性汞吸附剂和抗二氧化硫特性

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-02-14 DOI: 10.1002/apj.3045

Yu Shang, Ruhao Gong, Yufeng Duan, Qiang Zhou

{"title":"Cu-modified Fe-Mn magnetic mercury adsorbent and anti-SO2 characteristic","authors":"Yu Shang, Ruhao Gong, Yufeng Duan, Qiang Zhou","doi":"10.1002/apj.3045","DOIUrl":"10.1002/apj.3045","url":null,"abstract":"A series of Fe6Mn1Cux adsorbents for mercury removal were prepared by using co-precipitation and impregnation methods. The performance of mercury adsorption and anti-SO2 characteristic was studied in a fixed-bed experimental system. The effect of Cu doping amount, reaction temperature, and flue gas components on mercury removal was investigated. The mercury species on the spent adsorbent was analyzed through Hg-TPD test. The physical–chemical features were characterized by using the N2 adsorption/desorption, VSM, XPS, and XRD. It was found that the Fe6Mn1Cu0.4 exhibited a high performance of mercury adsorption and well magnetic property and good sulfur resistance. Under high concentration of SO2, the average adsorption efficiency of Fe6Mn1Cu0.4 adsorbent achieved 99%. Cu modification optimized the pore structure and improved the mercury removal performance as well as SO2 resistance. The XPS analysis indicated that Mn4+ was the main form that played an important role in oxidizing Hg0, as a result of decrement of Mn4+ after mercury adsorption. Mercury adsorbed on the spent adsorbent was HgO and HgSO4.","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139760503","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 of alkynyl alcohol derivatives and its corrosion inhibition on N80 steel in 5 M HCl 炔醇衍生物的合成及其在 5 M HCl 中对 N80 钢的缓蚀作用

IF 1.8 4区工程技术

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-02-13 DOI: 10.1002/apj.3048

Sheng Tu, Pengxi Li, Lunhong Ai, Qi Tang

引用次数: 0