Comparative characterization of iridium loading on catalyst assessment under different conditions

• 作者: Zahra Amirsardari Akram Dourani Mohamad Ali Amirifar Nooredin Ghadiri Massoom
• 来源期刊: 矿物冶金与材料学报
• 年，卷（期）: 2021,（7）
• 页码范围: 1233-1239
• 页数: 7页
• 语种: 英文

摘要

To discuss the potential role of iridium (Ir) nanoparticles loaded under atmospheric and high pressures, we prepared a series of cata-lysts with the same active phase but different contents of 10wt％, 20wt％, and 30wt％ on gamma-alumina for decomposition of hydrazine. Un-der atmospheric pressure, the performance of the catalyst was better when 30wt％ of the Ir nanoparticles was used with chelating agent that had greater selectivity of approximately 27％. The increase in the reaction rate from 175 to 220 h-1 at higher Ir loading (30wt％) was due to a good dispersion of high-number active phases rather than an agglomeration surface. As a satisfactory result of this investigation at high pressure, Ir catalysts with different weight percentages showed the same stability against crushing and activity with a characteristic velocity of approxim-ately 1300 m/s.