Chemical Engineering Research and Design最新文献

The effect of Ni- and Mo-based materials on thermochemical sulfate reduction by glycerol under hydrothermal process conditions 水热工艺条件下镍基和钼基材料对甘油热化学还原硫酸盐的影响

Chemical Engineering Research and Design Pub Date : 2024-03-19 DOI: 10.1016/j.cherd.2024.03.024

Cheng Chang, Frédéric Vogel, Oliver Kröcher, David Baudouin

{"title":"The effect of Ni- and Mo-based materials on thermochemical sulfate reduction by glycerol under hydrothermal process conditions","authors":"Cheng Chang, Frédéric Vogel, Oliver Kröcher, David Baudouin","doi":"10.1016/j.cherd.2024.03.024","DOIUrl":"https://doi.org/10.1016/j.cherd.2024.03.024","url":null,"abstract":"Catalytic hydrothermal gasification (cHTG) is a sustainable and promising route to convert wet biomass into renewable methane, but the catalyst is deactivated by small amounts of soluble sulfate stemming from the biomass feedstock. Under hydrothermal conditions, sulfate can be converted to the strong catalyst poisons thiols or sulfides by thermochemical sulfate reduction (TSR). In this work, we explored the extent to which TSR occurs under conditions relevant to cHTG operation, along with the impact of various materials on the reaction. Our results indicated that within 60min, an aqueous solution of 20wt% glycerol and 10mM potassium sulfate at 25MPa started to produce organosulfur compounds at ca. 420-440 °C, with yields of 3% and 6% at 440 °C and 490 °C for the volatile ones, respectively. The main products were non-volatile organosulfur compounds (NVOSC), which were tentatively identified as sulfate esters of decomposition products of glycerol. A smaller fraction of products consisted of volatile organosulfur compounds (VOSC). The VOSC identified from the TSR with glycerol were mostly alkyl thiophenes, as well as methanethiol, disulfides and trisulfides with no evidence of HS formed. Ni-, Mo-, or NiMo-based materials did not show a catalytic effect on sulfate reduction, independent of the sulfidation of the material. Glycerol was proven to be much more reactive towards TSR than acetone, as no TSR products could be observed when acetone was used as a reducing agent. A reaction pathway for the formation of thiophenes from HS and glycerol is proposed that consists of the dehydration of glycerol, the formation of CO and H from glycerol decomposition, hydroformylation of acrolein, and the Paal-Knorr synthesis with succinaldehyde and HS as intermediates.","PeriodicalId":9846,"journal":{"name":"Chemical Engineering Research and Design","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140182003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetics of methane hydrate formation from stirred aqueous NaCl solutions 搅拌的氯化钠水溶液中甲烷水合物的形成动力学

Chemical Engineering Research and Design Pub Date : 2023-12-22 DOI: 10.1016/j.cherd.2023.12.031

M.Sh. Madygulov, V.A. Vlasov

{"title":"Kinetics of methane hydrate formation from stirred aqueous NaCl solutions","authors":"M.Sh. Madygulov, V.A. Vlasov","doi":"10.1016/j.cherd.2023.12.031","DOIUrl":"https://doi.org/10.1016/j.cherd.2023.12.031","url":null,"abstract":"We experimentally studied the kinetics of methane hydrate formation from stirred aqueous NaCl solutions. The studies were carried out with pure water and aqueous solutions in which the mass fractions of NaCl were 0.2, 0.5, 1.5, 3.0, 5.0, and 7.0%. In all our kinetic experiments, there was the same initial mass of liquid water, a similar temperature, and a similar driving force for gas hydrate formation in terms of pressure. Under these conditions, the values of the rate of change in the mass of liquid water during the initial stage of methane hydrate formation from stirred aqueous NaCl solutions were determined. It has been found that if the mass fraction of NaCl in an aqueous solution is less than 1.0%, then methane hydrate is formed more rapidly from this solution compared to pure water, and if the mass fraction of NaCl in an aqueous solution is greater than 1.0%, then methane hydrate is formed more slowly from this solution compared to pure water. It has also been found that the presence of NaCl in an aqueous solution has little effect on the kinetics of methane hydrate formation from this solution. Additionally, we experimentally determined the phase equilibrium points for methane hydrate in the pure water–methane and 3.0 wt% NaCl solution–methane systems.","PeriodicalId":9846,"journal":{"name":"Chemical Engineering Research and Design","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139027723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance of the porous media model for simulating flow through an electrostatic precipitator 模拟流经静电除尘器的多孔介质模型的性能

Chemical Engineering Research and Design Pub Date : 2023-12-22 DOI: 10.1016/j.cherd.2023.12.033

Woongchul Choi, Joungho Han, Jeongmo Seong, Han June Park, Kyuho Han, Wonjun Jung, Wontae Hwang

{"title":"Performance of the porous media model for simulating flow through an electrostatic precipitator","authors":"Woongchul Choi, Joungho Han, Jeongmo Seong, Han June Park, Kyuho Han, Wonjun Jung, Wontae Hwang","doi":"10.1016/j.cherd.2023.12.033","DOIUrl":"https://doi.org/10.1016/j.cherd.2023.12.033","url":null,"abstract":"An electrostatic precipitator (ESP), which filters the fine particles present in the exhaust gas generated from a power plant, has a better particle-collection efficiency when there exists a uniform flow in the dust collection chamber. However, most former investigations examined the flow distribution via numerical approaches that modeled the perforated plates within the inlet diffuser as porous media, which have not been adequately validated. Therefore, the aim of this study was to examine the performance of the porous media model for simulating the flow through perforated plates of an ESP diffuser by numerical simulation and experiment. Simulation results using the porous media model were compared with those obtained with a fully resolved mesh precisely describing the complete geometry of the entire perforated plate. The results obtained with both these methods were consistent with experimental results obtained upstream of the inlet diffuser, but the porous media model could not accurately simulate the flow distribution across the perforated plates. Overall, this model failed to predict the deflection of incoming flow on the solid bars and the wakes behind the bars, and could not reflect the vena contracta phenomenon occurring within the holes of the plate. As a result, the simulated flow distribution at the entrance of the main dust-collection chamber differed from that observed in the experiment, which resulted in poor prediction of the flow field inside the chamber. Therefore, this porous media model requires further improvement for wide-scale adoption in industrial practical applications, e.g., ESP for flue gas treatment in power plants.","PeriodicalId":9846,"journal":{"name":"Chemical Engineering Research and Design","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139028781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High Pressure Homogenization – An Update on its Usage and Understanding 高压均质 - 最新使用和了解情况

Chemical Engineering Research and Design Pub Date : 2023-12-21 DOI: 10.1016/j.cherd.2023.12.026

Pavan Inguva, Silvia Grasselli, Paul W.S. Heng

引用次数: 0

Mask R-CNN based droplet detection in liquid-liquid systems. Part 3: Model generalization for accurate processing performance independent of image quality 基于掩膜 R-CNN 的液-液系统液滴检测。第 3 部分：与图像质量无关的精确处理性能模型泛化

Chemical Engineering Research and Design Pub Date : 2023-12-01 DOI: 10.1016/j.cherd.2023.12.005

Stepan Sibirtsev, Song Zhai, Andreas Jupke

引用次数: 0

Sustainability vs Suitability in Granulation 制粒的可持续性与适用性

Chemical Engineering Research and Design Pub Date : 2023-12-01 DOI: 10.1016/j.cherd.2023.12.032

Yashodh H Karunanayake, BrutschLinda Brütsch, Vincent Meunier, A. Salman

引用次数: 0

Predictive Modeling of Coke Formation in Ethylbenzene Cracking on 304H Austenitic Steel Surface using Response Surface Methodology (RSM) 利用响应曲面法 (RSM) 建立 304H 奥氏体钢表面乙苯裂解过程中焦炭形成的预测模型

Chemical Engineering Research and Design Pub Date : 2023-12-01 DOI: 10.1016/j.cherd.2023.12.029

K. Pourabdollah, Reza Khoshbin, Mohammad Amini Moghaddam, Younes Malekzadeh, Mehrzad Akbari Iraj

引用次数: 0

New kinetic models for predicting the removal of oil and grease from food-processing industry wastewater 预测食品加工废水中油脂去除的新动力学模型

Chemical Engineering Research and Design Pub Date : 2022-11-01 DOI: 10.1016/j.cherd.2022.10.047

M. A. Fulazzaky, S. Abdullah, K. Muda, A. Martin, M. Fulazzaky

引用次数: 2

Simultaneous Fe(OH)3 Formation and Silicon Adsorption Removal from Reverse Osmosis Brine Wastewater 反渗透盐水废水中Fe(OH)3的同时生成及硅的吸附去除

Chemical Engineering Research and Design Pub Date : 2022-11-01 DOI: 10.1016/j.cherd.2022.10.042

Jingjing Sun, Shangqing Chen, Junfeng Wang, Yicheng Nie

引用次数: 2

Movement of flexible filter media under pulse-jet filter cleaning conditions 脉冲射流过滤器清洗条件下柔性过滤介质的运动

Chemical Engineering Research and Design Pub Date : 2022-11-01 DOI: 10.1016/j.cherd.2022.11.002

G. Krammer, F. Holzinger

引用次数: 0