Abstract

In the present paper, an experimental study of the catalytic decomposition of hydrous hydrazine was investigated on the different structural forms of the catalyst. The synthesized iridium catalysts have been usually used directly and have not been evaluated in the laboratory reactor. This study includes the preparation of iridium-based catalysts supported on spherical (alumina), honeycomb monoliths (cordierite) and foams (alumina) for the evaluation of catalytic activity in the laboratory reactor. The characterizations of these catalysts were evaluated by the TGA, FESEM and BET analysis. The result of the catalytic characterization of monolithic support was shown a homogeneous distribution of active metal without any problem of sintering (average size 25 nm) on the support surface. While the surface of the spherical and foam supports were shown non-uniform distribution of nanoparticles on the support skeleton (average size 55 nm). The monolithic catalyst exhibits higher decomposition rate and H₂ selectivity than other supports due to uniform in shape and particle size distribution.

Graphic abstract

中文翻译：

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开发用于特殊催化床的新型负载型铱纳米催化剂

摘要

本文针对水合肼催化分解的不同结构形式进行了实验研究。合成的铱催化剂通常直接使用，还没有在实验室反应器中进行评估。这项研究包括制备负载在球形（氧化铝），蜂窝整料（堇青石）和泡沫（氧化铝）上的铱基催化剂，以评估实验室反应器中的催化活性。这些催化剂的表征通过TGA，FESEM和BET分析来评估。整体式载体的催化表征结果表明活性金属均匀分布，在载体表面上没有任何烧结问题（平均尺寸为25 nm）。虽然球形和泡沫载体的表面显示出纳米颗粒在载体骨架上的不均匀分布（平均尺寸为55 nm）。整体催化剂表现出较高的分解速率和H由于形状和粒度分布均匀，因此比其他载体具有_2的选择性。

图形摘要