Glycerol dehydration catalyzed by solid acid in nonthermal plasma and simulation analysis of plasma electric field

IF 1.9 4区农林科学 Q3 CHEMISTRY, APPLIED

Journal of the American Oil Chemists Society Pub Date : 2023-08-22 DOI:10.1002/aocs.12737

Lu Liu, Xiaofei Philip Ye, Ashim Datta

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Abstract

Nonthermal plasma (NTP), for the first time, was integrated in glycerol dehydration reaction catalyzed by silicotungstic acid supported on mesoporous silica with argon as the carrier and discharge gas. A range of reaction temperatures (220–320°C) and NTP discharge field strengths (2.06–6.87 kV/cm) were studied for the individual and interactive effects regarding the glycerol conversion and product selectivity. Results showed that the presence of NTP always improved the glycerol conversion, and NTP increased acrolein selectivity if properly conditioned. An optimal condition of 275°C and 4.58 kV/cm NTP field strength achieved a glycerol conversion of 94.4 mol%, acrolein selectivity of 88.0 mol%, with an acrolein yield of 83.1 mol%, representing a 10% improvement in acrolein production over that conducted at the same temperature but without NTP. Results of this study will also have significant implication for other heterogeneously catalyzed dehydration reactions. Simulation of the high-voltage electric field distribution as function of NTP electrical conductivity and relative permittivity of catalyst materials also offers insight for the future design of reactors and catalysts.

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非热等离子体中固体酸催化的甘油脱水及等离子体电场模拟分析

以氩气为载体和放电气体，首次将非热等离子体（NTP）结合到介孔二氧化硅上支撑的硅钨酸催化的甘油脱水反应中。研究了一系列反应温度（220-320°C）和 NTP 放电场强（2.06-6.87 kV/cm）对甘油转化率和产品选择性的单独和交互影响。结果表明，NTP 的存在总是能提高甘油转化率，如果条件适当，NTP 还能提高丙烯醛的选择性。在 275°C 和 4.58 kV/cm NTP 场强的最佳条件下，甘油转化率为 94.4 摩尔%，丙烯醛选择性为 88.0 摩尔%，丙烯醛产量为 83.1 摩尔%，与在相同温度下但不使用 NTP 的情况相比，丙烯醛产量提高了 10%。这项研究的结果还将对其他异构催化脱水反应产生重要影响。模拟高压电场分布与 NTP 电导率和催化剂材料相对介电常数的函数关系，也为今后设计反应器和催化剂提供了启示。

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来源期刊

Journal of the American Oil Chemists Society 工程技术-食品科技

CiteScore

4.10

自引率

5.00%

发文量

审稿时长

2.4 months

期刊介绍： The Journal of the American Oil Chemists’ Society (JAOCS) is an international peer-reviewed journal that publishes significant original scientific research and technological advances on fats, oils, oilseed proteins, and related materials through original research articles, invited reviews, short communications, and letters to the editor. We seek to publish reports that will significantly advance scientific understanding through hypothesis driven research, innovations, and important new information pertaining to analysis, properties, processing, products, and applications of these food and industrial resources. Breakthroughs in food science and technology, biotechnology (including genomics, biomechanisms, biocatalysis and bioprocessing), and industrial products and applications are particularly appropriate. JAOCS also considers reports on the lipid composition of new, unique, and traditional sources of lipids that definitively address a research hypothesis and advances scientific understanding. However, the genus and species of the source must be verified by appropriate means of classification. In addition, the GPS location of the harvested materials and seed or vegetative samples should be deposited in an accredited germplasm repository. Compositional data suitable for Original Research Articles must embody replicated estimate of tissue constituents, such as oil, protein, carbohydrate, fatty acid, phospholipid, tocopherol, sterol, and carotenoid compositions. Other components unique to the specific plant or animal source may be reported. Furthermore, lipid composition papers should incorporate elements of yeartoyear, environmental, and/ or cultivar variations through use of appropriate statistical analyses.