Pub Date : 2024-01-01Epub Date: 2023-06-26DOI: 10.1177/00034894231183497
Monica K Rossi Meyer, Ali R Abtahi, Scott R Owen
Background: Surgical repair of septal perforations has been historically cumbersome. Recently described techniques utilizing interposition grafting with polydioxanone (PDS) plates wrapped in a temporoparietal fascia (TPF) graft have reported successful closure in 90% to 100% of cases. Our objective is to expand the investigation into the use of interposition grafts of polydioxanone plates combined with a temporoparietal fascia graft for nasal septal perforation repair.
Methods: Retrospective review of the medical record was performed for all septal perforation repairs using the TPF-PDS plate interposition graft technique from August 1, 2017 to March 1, 2021 at the University of Iowa. Minimum post-operative follow-up was 1 month.
Results: Our series included 31 patients with symptomatic nasal septal perforations. Thirteen patients underwent open while 18 patients underwent endonasal graft placement. The mean perforation size was 1.49 cm2. The mean post-operative follow-up was 11.5 months.
Conclusions: Repair of symptomatic nasal septal perforations using an interposition graft of polydioxanone plate wrapped in temporoparietal fascia demonstrated an overall success rate of 90%.
{"title":"Temporoparietal Fascia Graft and Polydioxanone Plate Repair of Nasal Septal Perforation.","authors":"Monica K Rossi Meyer, Ali R Abtahi, Scott R Owen","doi":"10.1177/00034894231183497","DOIUrl":"10.1177/00034894231183497","url":null,"abstract":"<p><strong>Background: </strong>Surgical repair of septal perforations has been historically cumbersome. Recently described techniques utilizing interposition grafting with polydioxanone (PDS) plates wrapped in a temporoparietal fascia (TPF) graft have reported successful closure in 90% to 100% of cases. Our objective is to expand the investigation into the use of interposition grafts of polydioxanone plates combined with a temporoparietal fascia graft for nasal septal perforation repair.</p><p><strong>Methods: </strong>Retrospective review of the medical record was performed for all septal perforation repairs using the TPF-PDS plate interposition graft technique from August 1, 2017 to March 1, 2021 at the University of Iowa. Minimum post-operative follow-up was 1 month.</p><p><strong>Results: </strong>Our series included 31 patients with symptomatic nasal septal perforations. Thirteen patients underwent open while 18 patients underwent endonasal graft placement. The mean perforation size was 1.49 cm<sup>2</sup>. The mean post-operative follow-up was 11.5 months.</p><p><strong>Conclusions: </strong>Repair of symptomatic nasal septal perforations using an interposition graft of polydioxanone plate wrapped in temporoparietal fascia demonstrated an overall success rate of 90%.</p>","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":"31 1","pages":"63-68"},"PeriodicalIF":1.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88245273","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":"13 5","pages":""},"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":"65 1","pages":""},"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":"19 1","pages":""},"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":"18 10","pages":"0"},"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":" 42","pages":"0"},"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":"22 1","pages":"0"},"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":"10 1","pages":"0"},"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}
The formation conditions of yttria-stabilized zirconia (YSZ) thin films using the aerosol deposition (AD) method were investigated for developing a metal-supported solid oxide fuel cell (SOFC) equipped with the YSZ electrolyte. Using the AD method under mild conditions with a carrier gas flow rate of 4 L/min, a dense YSZ thin film can be formed at room temperature on both a stainless steel plate as the support and an anode layer heat treated at 1050 °C of the SOFC. Further, a metal-supported SOFC equipped with the aerosol-deposited YSZ electrolyte can be fabricated at a heat-treatment temperature of 1050 °C or less throughout the production process. An open-circuit voltage of 1.05 V and a power density of ca. 0.17 W/cm2 at 0.8 V were confirmed in the obtained metal-supported SOFC operated at 750 °C.
{"title":"Formation of Dense Yttria-Stabilized Zirconia Thin Film by Aerosol Deposition Method for Metal-Supported Solid Oxide Fuel Cell Applications","authors":"Kyohei Manabe, Mitsuaki Echigo, Yuji Tsuda, Kazuyuki Minami, Jun Akedo, Hisao Ohnishi","doi":"10.1080/00219592.2023.2261771","DOIUrl":"https://doi.org/10.1080/00219592.2023.2261771","url":null,"abstract":"The formation conditions of yttria-stabilized zirconia (YSZ) thin films using the aerosol deposition (AD) method were investigated for developing a metal-supported solid oxide fuel cell (SOFC) equipped with the YSZ electrolyte. Using the AD method under mild conditions with a carrier gas flow rate of 4 L/min, a dense YSZ thin film can be formed at room temperature on both a stainless steel plate as the support and an anode layer heat treated at 1050 °C of the SOFC. Further, a metal-supported SOFC equipped with the aerosol-deposited YSZ electrolyte can be fabricated at a heat-treatment temperature of 1050 °C or less throughout the production process. An open-circuit voltage of 1.05 V and a power density of ca. 0.17 W/cm2 at 0.8 V were confirmed in the obtained metal-supported SOFC operated at 750 °C.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135388634","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}
The regeneration of spent activated carbon used to adsorb alkyl acetates, which are the main volatile organic compounds (VOCs) used in the printing industry, is important because of numerous economic and environmental factors. Regeneration by supercritical CO2 (scCO2) avoids the high temperatures associated with the commonly used thermal regeneration method, which may damage the activated carbon. However, previous studies cover only a limited range of operating conditions, and more extensive research is required for better understanding the scCO2 process. In this study, the adsorption equilibria of propyl acetate on activated carbon in scCO2 were investigated using the fixed-bed adsorption method at 313 K–353 K and 10 MPa–20 MPa. Our results agree with previous reports of other VOCs on the effect of temperature and pressure on adsorption equilibria. Furthermore, the Dubinin–Astakhov (DA) equation is used to correlate the measured data with an average relative deviation of 5.6%. Evidently, the adsorbed amounts of propyl acetate are higher than those of ethyl acetate but lower than those of butyl acetate, which can be attributed to their different volatilities in scCO2 and different affinities for the used adsorbent.
{"title":"Adsorption Equilibria of Propyl Acetate on Activated Carbon Under Supercritical CO<sub>2</sub> Conditions","authors":"Eisuke Matsumoto, Mahmoud Magdy Azim, Shigeki Takishima, Ikuo Ushiki","doi":"10.1080/00219592.2023.2256366","DOIUrl":"https://doi.org/10.1080/00219592.2023.2256366","url":null,"abstract":"The regeneration of spent activated carbon used to adsorb alkyl acetates, which are the main volatile organic compounds (VOCs) used in the printing industry, is important because of numerous economic and environmental factors. Regeneration by supercritical CO2 (scCO2) avoids the high temperatures associated with the commonly used thermal regeneration method, which may damage the activated carbon. However, previous studies cover only a limited range of operating conditions, and more extensive research is required for better understanding the scCO2 process. In this study, the adsorption equilibria of propyl acetate on activated carbon in scCO2 were investigated using the fixed-bed adsorption method at 313 K–353 K and 10 MPa–20 MPa. Our results agree with previous reports of other VOCs on the effect of temperature and pressure on adsorption equilibria. Furthermore, the Dubinin–Astakhov (DA) equation is used to correlate the measured data with an average relative deviation of 5.6%. Evidently, the adsorbed amounts of propyl acetate are higher than those of ethyl acetate but lower than those of butyl acetate, which can be attributed to their different volatilities in scCO2 and different affinities for the used adsorbent.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134911210","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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