{"title":"Kinetics Analysis of Methylcyclohexane Dehydrogenation over Se-Modified Pt/TiO\u0000 2\u0000 Catalysts","authors":"Kazumasa Oshima, Hiroya Ito, Tsuyoshi Yamamoto, Masahiro Kishida","doi":"10.1080/00219592.2023.2301533","DOIUrl":"https://doi.org/10.1080/00219592.2023.2301533","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139889240","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}
{"title":"Kinetics Analysis of Methylcyclohexane Dehydrogenation over Se-Modified Pt/TiO\u0000 2\u0000 Catalysts","authors":"Kazumasa Oshima, Hiroya Ito, Tsuyoshi Yamamoto, Masahiro Kishida","doi":"10.1080/00219592.2023.2301533","DOIUrl":"https://doi.org/10.1080/00219592.2023.2301533","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139829227","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}
Pub Date : 2024-01-17DOI: 10.1080/00219592.2023.2287137
Y. Asakuma, Ryohei Yakata, A. Hyde, Chi Phan
{"title":"Prediction of Energy Concentration during Microwave Heating with a Thermal Diffusion Dimensionless Number","authors":"Y. Asakuma, Ryohei Yakata, A. Hyde, Chi Phan","doi":"10.1080/00219592.2023.2287137","DOIUrl":"https://doi.org/10.1080/00219592.2023.2287137","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139617868","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}
Pub Date : 2023-12-14DOI: 10.1080/00219592.2023.2293044
Yiqi Wang, Yoshito Oshima, M. Akizuki
{"title":"Catalytic Performance of Solid Base Na-ZrO\u0000 2\u0000 in Subcritical Water","authors":"Yiqi Wang, Yoshito Oshima, M. Akizuki","doi":"10.1080/00219592.2023.2293044","DOIUrl":"https://doi.org/10.1080/00219592.2023.2293044","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138974616","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}
Pub Date : 2023-11-30DOI: 10.1080/00219592.2023.2284176
Yuya Ono, Yoshiya Matsukawa, Y. Matsushita, Hideyuki Aoki
{"title":"Consideration on Accuracy of Numerical Analysis of Solid–Gas Two-Phase Flow with Reaction Using Energy Conservation Equation with Temperature as a Variable","authors":"Yuya Ono, Yoshiya Matsukawa, Y. Matsushita, Hideyuki Aoki","doi":"10.1080/00219592.2023.2284176","DOIUrl":"https://doi.org/10.1080/00219592.2023.2284176","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139199183","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}
Pub Date : 2023-11-29DOI: 10.1080/00219592.2023.2285859
Hiroyuki Matsuda, Kiyofumi Kurihara, K. Tochigi
{"title":"Evaluation of Solid–Liquid Equilibria for Ternary Pharmaceutical Compound + Water + Cyclodextrin or Its Derivative Systems with Wilson and Modified Chrastil Models","authors":"Hiroyuki Matsuda, Kiyofumi Kurihara, K. Tochigi","doi":"10.1080/00219592.2023.2285859","DOIUrl":"https://doi.org/10.1080/00219592.2023.2285859","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139213739","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}
In this study, the role of amphiphilic triblock copolymers in suppressing the coalescence of the polymers obtained by suspension polymerization was systematically investigated through the preparation of polymer beads using a common monomer (methyl methacrylate). First, a series of amphiphilic triblock copolymers (PAA-b-PS-b-PAA) were synthesized by atom transfer radical polymerization (ATRP). After synthesizing macroinitiators (PS), the corresponding amphiphilic triblock copolymers were prepared with varied numbers of hydrophobic and hydrophilic units. Subsequently, suspension polymerization was conducted to synthesize polymer beads using the obtained amphiphilic triblock copolymers as polymeric surfactants. We clarified the role of the amphiphilic triblock copolymers in suppressing coalescence of each bead, by observing the size of the monomer droplets prior to suspension polymerization and that of the resulting polymer beads with a microscope.
{"title":"Synthesis of Amphiphilic Triblock Copolymers by ATRP and Coalescence Suppression Effect in Suspension Polymerization","authors":"Eri Fujita, Kosuke Kaneko, Tsubasa Oshima, Daiki Fujioka, Kimiyoshi Kaneko, Kiyomi Fuchigami, Tomonori Hanasaki","doi":"10.1080/00219592.2023.2276424","DOIUrl":"https://doi.org/10.1080/00219592.2023.2276424","url":null,"abstract":"In this study, the role of amphiphilic triblock copolymers in suppressing the coalescence of the polymers obtained by suspension polymerization was systematically investigated through the preparation of polymer beads using a common monomer (methyl methacrylate). First, a series of amphiphilic triblock copolymers (PAA-b-PS-b-PAA) were synthesized by atom transfer radical polymerization (ATRP). After synthesizing macroinitiators (PS), the corresponding amphiphilic triblock copolymers were prepared with varied numbers of hydrophobic and hydrophilic units. Subsequently, suspension polymerization was conducted to synthesize polymer beads using the obtained amphiphilic triblock copolymers as polymeric surfactants. We clarified the role of the amphiphilic triblock copolymers in suppressing coalescence of each bead, by observing the size of the monomer droplets prior to suspension polymerization and that of the resulting polymer beads with a microscope.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341456","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}
Pub Date : 2023-11-08DOI: 10.1080/00219592.2023.2277827
Michiaki Matsumoto, Makoto Ueda, Yoshiro Tahara
In this study, we prepared eutectic mixtures containing decanoic acid as the hydrophobic hydrogen bonding donor, a lidocaine analog, and quaternary ammonium salt or terpenoid as the hydrophobic hydrogen bonding acceptor. The eutectic mixtures containing terpenoids, especially menthone, had very low viscosities. A series of monocarboxylic and dicarboxylic acid extractions were performed with the eutectic mixtures. The extractability of aliphatic monocarboxylic and dicarboxylic acids with eutectic mixtures containing terpenoids and decanoic acid was proportional to the hydrophobicities of their carboxylic acids. However, lactic acid was more extracted than acetic acid in a menthol-based eutectic mixture, even though lactic acid, a hydroxycarboxylic acid, is more hydrophilic than acetic acid, an aliphatic carboxylic acid.
{"title":"Extraction of Organic Acids with Hydrophobic Eutectic Mixtures Containing Terpenoids and Decanoic Acid","authors":"Michiaki Matsumoto, Makoto Ueda, Yoshiro Tahara","doi":"10.1080/00219592.2023.2277827","DOIUrl":"https://doi.org/10.1080/00219592.2023.2277827","url":null,"abstract":"In this study, we prepared eutectic mixtures containing decanoic acid as the hydrophobic hydrogen bonding donor, a lidocaine analog, and quaternary ammonium salt or terpenoid as the hydrophobic hydrogen bonding acceptor. The eutectic mixtures containing terpenoids, especially menthone, had very low viscosities. A series of monocarboxylic and dicarboxylic acid extractions were performed with the eutectic mixtures. The extractability of aliphatic monocarboxylic and dicarboxylic acids with eutectic mixtures containing terpenoids and decanoic acid was proportional to the hydrophobicities of their carboxylic acids. However, lactic acid was more extracted than acetic acid in a menthol-based eutectic mixture, even though lactic acid, a hydroxycarboxylic acid, is more hydrophilic than acetic acid, an aliphatic carboxylic acid.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341132","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}
Steam reforming of bioethanol is a potential reaction for H2 production. The development of active Ni catalysts with sintering resistance, coking resistance and thermal stability is indispensable for practical application. In this study, the encapsulation structure of Ni nanoparticles inside Silicalite-1 was proposed as a catalyst (Ni@Silicalite-1). The catalyst was prepared by hydrothermal synthesis using Ni-phyllosilicate as a Ni precursor. An investigation of catalytic activity was conducted at 500–800 °C, along with an investigation of catalyst properties, including surface morphology, Ni properties, and coke formation on the spent catalysts, compared to a conventional Ni/Silicalite-1. Ni@Silicalite-1 exhibits a higher ethanol conversion, hydrogen production, and selectivity towards C1 products. Especially in a kinetic control condition (500–600 °C), Ni@Silicalite-1 exhibits 46.8% in ethanol conversion at 500 °C and two times higher in C2-to-C1 conversion at 600 °C than that of Ni/Silicalite-1. Moreover, a significant coke suppression of 2–5 times reduction form that of impregnation catalyst is obtained for Ni@Silicalite-1 in various reaction temperatures. It also shows a sintering resistance as maintaining the Ni size at 4.0–4.1 nm after ESR at high temperature (800 °C 4 h). Therefore, the encapsulation structure of ultrafine Ni nanoparticles inside Silicalite-1 is promising for bioethanol steam reforming.
{"title":"Development of Ni Nanoparticle Encapsulated with Silicalite-1 Catalyst for High Activity Steam Reforming of Bioethanol with High Sintering Resistance and Coke Suppression","authors":"Sirintra Arayawate, Tsuki Yokosawa, Kentaro Kimura, Hiroyasu Fujitsuka, Teruoki Tago","doi":"10.1080/00219592.2023.2269226","DOIUrl":"https://doi.org/10.1080/00219592.2023.2269226","url":null,"abstract":"Steam reforming of bioethanol is a potential reaction for H2 production. The development of active Ni catalysts with sintering resistance, coking resistance and thermal stability is indispensable for practical application. In this study, the encapsulation structure of Ni nanoparticles inside Silicalite-1 was proposed as a catalyst (Ni@Silicalite-1). The catalyst was prepared by hydrothermal synthesis using Ni-phyllosilicate as a Ni precursor. An investigation of catalytic activity was conducted at 500–800 °C, along with an investigation of catalyst properties, including surface morphology, Ni properties, and coke formation on the spent catalysts, compared to a conventional Ni/Silicalite-1. Ni@Silicalite-1 exhibits a higher ethanol conversion, hydrogen production, and selectivity towards C1 products. Especially in a kinetic control condition (500–600 °C), Ni@Silicalite-1 exhibits 46.8% in ethanol conversion at 500 °C and two times higher in C2-to-C1 conversion at 600 °C than that of Ni/Silicalite-1. Moreover, a significant coke suppression of 2–5 times reduction form that of impregnation catalyst is obtained for Ni@Silicalite-1 in various reaction temperatures. It also shows a sintering resistance as maintaining the Ni size at 4.0–4.1 nm after ESR at high temperature (800 °C 4 h). Therefore, the encapsulation structure of ultrafine Ni nanoparticles inside Silicalite-1 is promising for bioethanol steam reforming.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135883995","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}
Pub Date : 2023-10-04DOI: 10.1080/00219592.2023.2260416
Zhenhao Tang, Yuan Yang, Luyin Pan, Mengxuan Sui, Shengxian Cao
The heat transfer and hydrodynamic safety of the water-cooled wall in coal-fired boilers are important guarantees for the safe and stable operation of thermal power units. In recent years, influenced by coal quality changes and load fluctuation, the ash deposition and slagging of the water wall and the fluctuation of heat load bring great challenges to the furnace heat transfer safety. It is urgent to monitor the heat flux distribution of the water-cooled wall in the furnace to ensure the safety of the heating surface. In this study, a calculation method for heat flux distribution of 350 MW boiler based on computational fluid dynamics (CFD) and extreme learning machine (ELM) is proposed. First, 120 typical operating conditions in boiler were simulated using ANSYS Fluent to characterize heat flux distribution. Next, to circumvent the high computational cost of CFD simulations, a heat flux distribution prediction model based on multi-ELM was developed by integrating the simulation data and the actual operating parameters of the boiler. Two parameters, namely, separated over-fire air (SOFA) damper opening and main burner secondary air damper opening, were applied to divide the 120 operating conditions into six categories, and use K-means algorithm to find the central operating condition of each category. In each category, the heat flux data of a specific operating condition were randomly selected as the verification set, and the validity of the heat flux distribution prediction models was verified. Finally, the prediction models of heat flux distribution based on multi-ELM were compared with the prediction models based on four contemporary neural network algorithms. Results showed that for the multi-ELM model, the prediction error was <10%, showing that it can accurately predict the heat flux distribution of a boiler and provide guidance for the regulation of the actual production process.
{"title":"Fast Prediction of Heat Flux Distribution in Boilers Using Computational Fluid Dynamics Simulation Data via Multi-Extreme Learning Machines","authors":"Zhenhao Tang, Yuan Yang, Luyin Pan, Mengxuan Sui, Shengxian Cao","doi":"10.1080/00219592.2023.2260416","DOIUrl":"https://doi.org/10.1080/00219592.2023.2260416","url":null,"abstract":"The heat transfer and hydrodynamic safety of the water-cooled wall in coal-fired boilers are important guarantees for the safe and stable operation of thermal power units. In recent years, influenced by coal quality changes and load fluctuation, the ash deposition and slagging of the water wall and the fluctuation of heat load bring great challenges to the furnace heat transfer safety. It is urgent to monitor the heat flux distribution of the water-cooled wall in the furnace to ensure the safety of the heating surface. In this study, a calculation method for heat flux distribution of 350 MW boiler based on computational fluid dynamics (CFD) and extreme learning machine (ELM) is proposed. First, 120 typical operating conditions in boiler were simulated using ANSYS Fluent to characterize heat flux distribution. Next, to circumvent the high computational cost of CFD simulations, a heat flux distribution prediction model based on multi-ELM was developed by integrating the simulation data and the actual operating parameters of the boiler. Two parameters, namely, separated over-fire air (SOFA) damper opening and main burner secondary air damper opening, were applied to divide the 120 operating conditions into six categories, and use K-means algorithm to find the central operating condition of each category. In each category, the heat flux data of a specific operating condition were randomly selected as the verification set, and the validity of the heat flux distribution prediction models was verified. Finally, the prediction models of heat flux distribution based on multi-ELM were compared with the prediction models based on four contemporary neural network algorithms. Results showed that for the multi-ELM model, the prediction error was <10%, showing that it can accurately predict the heat flux distribution of a boiler and provide guidance for the regulation of the actual production process.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135597423","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：