Impact Factor:

6.1

DOI number:

10.1016/j.jiec.2024.01.018

Affiliation of Author(s):

环境与资源学院

Teaching and Research Group:

化学工程系

Journal:

Journal of Industrial and Engineering Chemistry

Funded by:

重庆市自然科学基金面上项目

Key Words:

Highly dispersed Pd/γ-Al2O3 catalyst; Benzene hydrogenation; Cyclohexane dehydrogenation; Hydrogen storage; Liquid organic hydrogen carrier

Abstract:

The research and development of efficient catalyst is the key to achieving high-capacity hydrogen storage inliquid organic hydrogen carriers (LOHCs). The highly dispersed Pd/γ-Al2O3 catalysts with few-atom Pd wereprepared by impregnation method using HNO3 as promoter. The hydrogen storage capacity of the benzene/cyclohexane hydrogen carriers was further investigated by vapor phase benzene hydrogenation and cyclohexanedehydrogenation reactions over the studied Pd/γ-Al2O3 catalysts. The results showed that the metal Pd was theactive centers for the benzene hydrogenation/cyclohexane dehydrogenation reactions. The addition of HNO3 caneffectively promote the metal Pd to be highly dispersed, thus improving the Pd atoms utilization and reducing thePd dosage. Meanwhile, the strongly electronic effects between the highly dispersed Pd species and the Al2O3support promoted the electron-deficient Pdδ+ sites to be formed, which enhanced the adsorption and activationability for the reactants molecules. The benzene conversion on the Pd/γ-Al2O3 catalyst with a metallic Pd loadingof 1.0 wt% reached 97.51 % at 200 ◦C. While the cyclohexane conversion reached 90.94 % at 400 ◦C with theactual hydrogen storage capacity of 6.54 wt%, which provided an effective idea for large-scale storage andtransportation of H2 based on LOHCs

First Author:

Guilin Zhou

Co-author:

Wenjing Liu,Yue Zhao,Xiaoping Wang,Shuang Chen,Aiping Jia,Hongmei Xie

Indexed by:

源刊论文

Correspondence Author:

Guilin Zhou

Discipline:

Engineering

Document Type:

Journal Article

Volume:

134

Page Number:

561–573

Translation or Not:

no

Date of Publication:

2024-06-25

Included Journals:

SCI

Links to published journals:

https://doi.org/10.1016/j.jiec.2024.01.018