Hydrophobic Ni foam catalyst for nitrobenzene hydrogenation enhancement in micropacked bed reactors

IF 3.5 3区 工程技术 Q2 ENGINEERING, CHEMICAL
AIChE Journal Pub Date : 2025-04-01 DOI:10.1002/aic.18846
Hong-Da Zhang, Wei-Yao Yang, Miao Pang, Ya-Qiao Tian, Shi-Chao Su, Zhi-Ping Zhao, Le Sang
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引用次数: 0

Abstract

Non-modified Pd/PDA/Ni foam, hydrophobic modified F9-Pd/PDA/Ni foam, and F17-Pd/PDA/Ni foam catalysts are successfully prepared and used for NB hydrogenation in micropacked bed reactors (μPBRs). The catalytic performance increases with the addition of water in the water–methanol mixed solvent. In the mixed solvent with 50 v/v% water, F17-Pd/PDA/Ni foam can almost completely convert nitrobenzene (NB) with a yield of 95.9% at a mild 45°C. As the solvent contact angle of catalysts increases (87.5–141.5°), the enhancement ratios of NB conversion and AN yield are 28.9%–92.4% and 31.4%–106.5%, respectively. The space–time yield of AN in μPBRs reaches 1.873 kg·L−1·h−1·g−1, which is 1–2 orders of magnitude higher than that of conventional reactors. The kinetic model of NB hydrogenation is established at the water–methanol system in μPBRs. The hydrophobicity of catalysts significantly improves the reaction rate of NB hydrogenation, and the reaction rate constant is increased by 69.9%.
微填充床反应器中硝基苯加氢强化的疏水镍泡沫催化剂
成功制备了非改性Pd/PDA/Ni泡沫、疏水改性F9-Pd/PDA/Ni泡沫和F17-Pd/PDA/Ni泡沫催化剂,并将其用于微填充床反应器(μPBRs)的NB加氢。水-甲醇混合溶剂中水的加入使催化性能提高。在50 v/v%水的混合溶剂中,F17-Pd/PDA/Ni泡沫在温和的45℃下几乎可以完全转化硝基苯(NB),收率为95.9%。随着催化剂溶剂接触角(87.5 ~ 141.5°)的增大,NB转化率和AN收率的提高率分别为28.9% ~ 92.4%和31.4% ~ 106.5%。在μPBRs中,AN的时空产率达到1.873 kg·L−1·h−1·g−1,比传统反应器提高了1 ~ 2个数量级。建立了μ pbr中水-甲醇体系中NB加氢的动力学模型。催化剂的疏水性显著提高了NB加氢的反应速率,反应速率常数提高了69.9%。
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来源期刊
AIChE Journal
AIChE Journal 工程技术-工程:化工
CiteScore
7.10
自引率
10.80%
发文量
411
审稿时长
3.6 months
期刊介绍: The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.
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