Work

Self-developed Ortho-para Hydrogen Conversion Catalyst: Catalytic Testing and Optimization of Batch Preparation Process

Year: 2026

Type: article

Abstract: Ortho-para hydrogen conversion catalyst (OPC) is one of the key materials in large-scale hydrogen liquefaction projects.In recent years, research has primarily focused on enhancing the low-temperature catalytic activity of existing systems, while the accurate measurement of para-hydrogen content has become the foundation of such studies.However, only a limited number of studies and relevant industry standards have reported on the testing accuracy and reliability of para-hydrogen analysis, and reports on the batch preparation process remain scarce.Optimizing these processes to guide mass production is particularly crucial for reducing reliance on imported catalysts.This study explores both the catalytic testing analysis and the optimization of mass production processes for OPC.It not only demonstrates the stability and high measurement accuracy of the experimental results obtained from the self-developed testing platform, but also identifies the optimal mass production process combination to maximize yield through a comprehensive comparison of catalytic performance and mechanical strength.Furthermore, process optimizations such as low-temperature activation, particle size optimization, and secondary washing are implemented to produce catalysts with superior catalytic activity.The results show that the self-developed catalyst 2# with primary crushing, sieving through a 0.8 mm 第*期李娜, 等: 自研正仲氢转化催化剂的催化测试分析及批量制备工艺优化 2 sieve, washing and low-temperature activation exhibits approximately 3.4% higher catalytic performance than imported catalysts at a space velocity of 1.2 L/(minꞏmL), with corresponding conversion rate and reaction rate constant (k value) approximately 7.42% and 25.78% higher, respectively.This study demonstrates that the self-developed catalysts with excellent performance can be achieved through batch preparation, providing critical support for domestic substitution.

Source: Journal of Inorganic Materials

DOI: 10.15541/jim20250373

Authors: Na LI, Jin WEI, Ruixiao CAO, Yu LIU, Guiwen HUANG, Hongmei XIAO

Institutions: Chinese Academy of Sciences, Technical Institute of Physics and Chemistry

Language: English

Topic: Spacecraft and Cryogenic Technologies

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

Funder: Chinese Academy of Sciences