Competitive effects of compounding aromatic hydrogen storage carriers in low-pressure hydrogenation reactions

IF 7.2 2区工程技术 Q1 CHEMISTRY, APPLIED

Fuel Processing Technology Pub Date : 2024-10-15 DOI:10.1016/j.fuproc.2024.108143

Xiaopeng Mei , Zixuan Ma , Yingjie Yang , Xiaofeng Gao , Hantao Gong , Ziyu Song , Siyu Yao

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Abstract

The reaction activity of various liquid organic hydrogen carriers (LOHCs) over 5 wt% Rh/C (BET surface area 933.5 g/cm³, pore size 4.6 nm, metal dispersion 10.5 %) and 5 wt% Ru/C (BET surface area 888.4 g/cm³, pore size 6.1 nm, metal dispersion 8.9 %) catalysts is evaluated. The results show that monocyclic aromatic hydrocarbons have the highest reactivity, followed by monocyclic aromatic rings, while polycyclic and fused cyclic aromatic hydrocarbons have relatively low activity. It is also found that mixing different LOHCs leads to a competitive effect, resulting in lower reactivities for all LOHCs. As the degree of LOHC hydrogenation increases, the adsorption of multi-step hydrogenation intermediates becomes more difficult, resulting in lower yields of fully hydrogenated products. It is important to understand the behavior of LOHCs in hydrogenation reactions and to optimize the performance of LOHCs compound systems.

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低压氢化反应中复合芳香族储氢载体的竞争效应

评估了各种液态有机氢载体（LOHC）在 5 wt% Rh/C（BET 表面积 933.5 g/cm3，孔径 4.6 nm，金属分散度 10.5 %）和 5 wt% Ru/C（BET 表面积 888.4 g/cm3，孔径 6.1 nm，金属分散度 8.9 %）催化剂上的反应活性。结果表明，单环芳香烃的反应活性最高，其次是单环芳香环，而多环和融环芳香烃的活性相对较低。研究还发现，混合不同的 LOHC 会产生竞争效应，导致所有 LOHC 的反应活性降低。随着 LOHC 加氢程度的增加，多步加氢中间体的吸附变得更加困难，导致完全加氢产物的产量降低。了解 LOHC 在氢化反应中的行为以及优化 LOHC 化合物体系的性能非常重要。

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来源期刊

Fuel Processing Technology 工程技术-工程：化工

CiteScore

13.20

自引率

9.30%

发文量

398

审稿时长

26 days

期刊介绍： Fuel Processing Technology (FPT) deals with the scientific and technological aspects of converting fossil and renewable resources to clean fuels, value-added chemicals, fuel-related advanced carbon materials and by-products. In addition to the traditional non-nuclear fossil fuels, biomass and wastes, papers on the integration of renewables such as solar and wind energy and energy storage into the fuel processing processes, as well as papers on the production and conversion of non-carbon-containing fuels such as hydrogen and ammonia, are also welcome. While chemical conversion is emphasized, papers on advanced physical conversion processes are also considered for publication in FPT. Papers on the fundamental aspects of fuel structure and properties will also be considered.