低碳化学与化工2024，Vol.49Issue(9)：106-112,7.DOI:10.12434/j.issn.2097-2547.20240248
封装型α-Fe2O3@SiO2催化剂的制备及其催化正仲氢转化性能评价
Preparation of encapsulated α-Fe2O3@SiO2 catalyst and evaluation of its catalytic performance in orthohydrogen-parahydrogen conversion
陈志强 1汪丽 1丁明伟 1孙海云 1方涛 1蒋榕培1
作者信息
- 1. 北京航天试验技术研究所航天液体推进剂研究中心,北京 100074
- 折叠
摘要
Abstract
Orthohydrogen and parahydrogen(hereinafter referred to as"orthohydrogen-parahydrogen")conversion reaction affects the liquefaction process of hydrogen at low temperature and is an important step in the storage and transportation of liquid hydrogen.Traditional iron-based catalysts face problems such as the aggregative growth of active species,the insufficient resistance ability of water and the poor tolerance ability of high temperature.To solve above problems,α-Fe2O3 was encapsulated into amorphous silica with abundant pore structures,and the encapsulated α-Fe2O3@SiO2 catalyst with high catalytic performance in orthohydrogen-parahydrogen conversion was prepared.SE M、XRD and H2-TPR were used to investigate the effects of the encapsulated structure on surface morphologies,crystal structures and reduction abilities of catalysts.The catalytic performances of catalysts were evaluated by test device,and the relationship between the encapsulated structure and catalytic performance was analyzed and summarized.The results show that the encapsulated structure can optimize the pore structure of the catalyst,regulate the electronic property of active sites,improve the structural stability and high temperature tolerance ability of the catalyst,and thereby improve the catalytic performance.When the volume space velocity is 600 min-1,under the action of α-Fe2O3@SiO2 and α-Fe2O3/SiO2(without encapsulation),parahydrogen volume fractions at the outlet of the device are 41.8％and 37.6％,and the orthohydrogen conversion rates are 22.4％and 16.8％,respectively,indicating that encapsulated iron-based catalysts have high potential for application in the field of orthohydrogen-parahydrogen conversion.关键词
正仲氢转化/封装/催化剂/电子性质Key words
orthohydrogen-parahydrogen conversion/encapsulation/catalysts/electronic property分类
化学化工引用本文复制引用
陈志强,汪丽,丁明伟,孙海云,方涛,蒋榕培..封装型α-Fe2O3@SiO2催化剂的制备及其催化正仲氢转化性能评价[J].低碳化学与化工,2024,49(9):106-112,7.
