过氧化氢催化剂晶粒尺寸对性能和老化的影响

IF 3.1 2区物理与天体物理 Q1 ENGINEERING, AEROSPACE

Acta Astronautica Pub Date : 2024-10-22 DOI:10.1016/j.actaastro.2024.10.046

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引用次数: 0

摘要

为比较催化活性和催化剂老化情况，对用于 HTP 98% 分解的两种不同直径的 Pt/Al2O3 球形催化剂（1 毫米和 2 毫米）进行了测试。在催化分解装置中进行类似推进器的测试时，尽管 1 毫米的催化剂显示出更好的反应活性和升温时间，包括在冷启动操作中，但仍获得了相似的分解性能效率。然而，在对 1 毫米催化剂进行测试的整个过程中观察到，伴随着压力峰值的快速物理降解导致了催化剂的损坏和细粒的出现，造成了床层的部分堵塞。

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Influence of hydrogen peroxide catalyst grain size on performance and ageing

Two different diameters of Pt/Al₂O₃ spherical catalysts (1 mm and 2 mm) for HTP 98 % decomposition were tested to compare the catalytic activity and catalyst ageing. Comparable decomposition performance efficiencies were obtained during thruster-like tests in a catalytic decomposition setup, even though the 1-mm showed a better reactivity and temperature rising time, including in cold-start operation. However, a rapid physical degradation accompanied by pressure peaks observed throughout testing of the 1-mm catalyst led to damage of the catalyst and apparition of fines, causing partial clogging of the bed.

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来源期刊

Acta Astronautica 工程技术-工程：宇航

CiteScore

7.20

自引率

22.90%

发文量

599

审稿时长

53 days

期刊介绍： Acta Astronautica is sponsored by the International Academy of Astronautics. Content is based on original contributions in all fields of basic, engineering, life and social space sciences and of space technology related to: The peaceful scientific exploration of space, Its exploitation for human welfare and progress, Conception, design, development and operation of space-borne and Earth-based systems, In addition to regular issues, the journal publishes selected proceedings of the annual International Astronautical Congress (IAC), transactions of the IAA and special issues on topics of current interest, such as microgravity, space station technology, geostationary orbits, and space economics. Other subject areas include satellite technology, space transportation and communications, space energy, power and propulsion, astrodynamics, extraterrestrial intelligence and Earth observations.