A kinetics study on continuous dehydrogenation of dodecahydro‐N‐ethylcarbazole

IF 1.8 4区工程技术 Q3 Chemical Engineering

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-17 DOI:10.1002/apj.3131

Bo Wang, Pei‐ya Li, Shu‐han Lu, Bin Wang, Fusheng Yang, Tao Fang

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引用次数: 0

Abstract

Liquid organic hydrogen carrier (LOHC) technology has unique advantages in hydrogen storage and transportation. However, the lack of research on the continuous dehydrogenation process of LOHCs has hindered the design and application of industrial dehydrogenation processes. In this work, a highly active dehydrogenation catalyst 1.5 wt% Pd/activated carbon (Pd/C) and a commercial catalyst 5 wt% Pd/Al2O3 were used for the continuous dehydrogenation of dodecahydro‐N‐ethylcarbazole (12H‐NEC). Based on a tubular reactor and lab‐scale apparatus, 1.5 wt% Pd/C catalyst achieved a maximum dehydrogenation conversion of 98.3% and a maximum NEC selectivity of 95.3%, while dehydrogenation conversion and NEC selectivity with 5 wt% Pd/Al2O3 were 98.3% and 97.6%, respectively. It showed the equally excellent performance between Pd/C and Pd/Al2O3, and the former has less Pd loading than the latter, with the potential of reducing the production cost of the dehydrogenation catalyst. The dehydrogenation results also indicated the difference in catalytic performance between the two kinds of catalysts. The obtained kinetics data were analyzed, and the dynamics of continuous dehydrogenation were studied to provide fundamental information for dehydrogenation scale‐up.

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十二氢-N-乙基咔唑连续脱氢动力学研究

液态有机氢载体（LOHC）技术在氢气储存和运输方面具有独特的优势。然而，由于缺乏对液态有机氢载体连续脱氢工艺的研究，阻碍了工业脱氢工艺的设计和应用。在这项工作中，采用了 1.5 wt% Pd/活性炭（Pd/C）高活性脱氢催化剂和 5 wt% Pd/Al2O3 商用催化剂对十二氢-N-乙基咔唑（12H-NEC）进行连续脱氢。在管式反应器和实验室规模装置的基础上，1.5 wt% Pd/C 催化剂实现了 98.3% 的最大脱氢转化率和 95.3% 的最大 NEC 选择性，而 5 wt% Pd/Al2O3 催化剂的脱氢转化率和 NEC 选择性分别为 98.3% 和 97.6%。结果表明，Pd/C 和 Pd/Al2O3 具有同样优异的性能，而且前者的 Pd 负载比后者少，有望降低脱氢催化剂的生产成本。脱氢结果也表明了两种催化剂在催化性能上的差异。对所获得的动力学数据进行了分析，研究了连续脱氢的动力学过程，为脱氢放大提供了基础信息。

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来源期刊

Asia-Pacific Journal of Chemical Engineering 工程技术-工程：化工

CiteScore

3.50

自引率

11.10%

发文量

111

审稿时长

2.8 months

期刊介绍： Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration. Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).