封装型<italic style="font-style: italic">α</italic>-Fe2O3@SiO2催化剂的制备及其催化正仲氢转化性能评价

陈志强; 汪丽; 丁明伟; 孙海云; 方涛; 蒋榕培

doi:10.12434/j.issn.2097-2547.20240248

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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

氢气液化

- 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
- 低碳化学与化工 2024, 49(9): 106-112.
- 作者机构：
  
  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
- 作者简介：
  
  陈志强（1990—），博士，工程师，研究方向为能源催化，E-mail：chenzq_101@126.com。
  方涛（1979—），博士，研究员，研究方向为推进剂化学与技术，E-mail：fangtao7217@163.com。
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240248
  中图分类号： TQ426
- 纸质出版日期：2024-09-25，
  
  收稿日期：2024-06-04，
  
  修回日期：2024-08-11，
- 稿件说明：
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陈志强,汪丽,丁明伟等.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(09):106-112.

CHEN Zhiqiang,WANG Li,DING Mingwei,et al.Preparation of encapsulated α-Fe₂O₃@SiO₂ catalyst and evaluation of its catalytic performance in orthohydrogen-parahydrogen conversion[J].Low-carbon Chemistry and Chemical Engineering,2024,49(09):106-112.
陈志强,汪丽,丁明伟等.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(09):106-112. DOI： 10.12434/j.issn.2097-2547.20240248.

CHEN Zhiqiang,WANG Li,DING Mingwei,et al.Preparation of encapsulated α-Fe₂O₃@SiO₂ catalyst and evaluation of its catalytic performance in orthohydrogen-parahydrogen conversion[J].Low-carbon Chemistry and Chemical Engineering,2024,49(09):106-112. DOI： 10.12434/j.issn.2097-2547.20240248.

摘要

正氢和仲氢（以下简称“正仲氢”）转化反应影响氢气的低温液化过程，是液氢贮存和运输过程中的关键步骤。传统铁基催化剂面临活性物种聚集长大、耐水性不足和高温耐受性差等问题。为解决以上问题，通过将

-Fe

封装于具有丰富孔道结构的无定形二氧化硅中，制备了催化正仲氢转化的高性能封装型

-Fe

@SiO

催化剂。利用 SEM、XRD和H

-TPR等表征手段探究了封装型结构对催化剂表面形貌、晶体结构以及还原性能等的影响，利用性能测试装置评价了催化剂催化性能，分析并总结了封装型结构与催化剂催化性能之间的关系。结果表明，封装型结构可优化催化剂孔道结构，调控活性位点电子性质，提升催化剂结构稳定性和高温耐受性，进而提升催化剂催化性能。当体积空速为600 min

-1

时，在

-Fe

@SiO

和

-Fe

/SiO

（不具备封装型结构）的作用下，装置出口处仲氢体积

分数分别为41.8%和37.6%，正氢转化率分别为22.4%和16.8%，表明封装型铁基催化剂在正仲氢转化领域具备较高的应用潜力。

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-

was encapsulated into amorphous silica with abundant pore structures

and the encapsulated

-Fe

@SiO

catalyst with high catalytic performance in orthohydrogen-parahydrogen conversion was prepared. SEM、XRD and H

-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

-Fe

@SiO

and

-Fe

/SiO

(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 orthohydr

ogen-parahydrogen conversion.

关键词

正仲氢转化封装催化剂电子性质

Keywords

orthohydrogen-parahydrogen conversionencapsulationcatalystselectronic property

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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

DOI：10.12434/j.issn.2097-2547.20240248

摘要

Abstract

关键词

Keywords

references

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