工业废料负载的钌催化剂上的催化氨分解反应

Catalytic ammonia decomposition over industrial-waste-supported Ru catalysts.

作者信息

Ng Pei Fang, Li Li, Wang Shaobin, Zhu Zhonghua, Lu Gaoqing, Yan Zifeng

机构信息

ARC Functional Nanomaterials, The University of Queensland, St. Lucia, Queensland 4072, Australia.

出版信息

Environ Sci Technol. 2007 May 15;41(10):3758-62. doi: 10.1021/es062326z.

DOI:10.1021/es062326z

PMID:17547209

Abstract

Industrial solid wastes (fly ash and red mud) have been employed as supports for preparation of Ru-based catalysts. Physical and chemical treatments on red mud were conducted and these modified supports were also used for preparation of Ru-based catalysts. Those Ru catalysts were characterized by various techniques such as N2 adsorption, H2 adsorption, XRD, XPS, and temperature-programmed reduction (TPR), and were then tested for catalytic ammonia decomposition to hydrogen. It was found that red-mud-supported Ru catalyst exhibits higher ammonia conversion and hydrogen production than fly-ash-supported catalyst. Heat and chemical treatments of the red mud greatly improve the catalytic activity. Moreover, a combination of acid and heat treatments produces the highest catalytic conversion of ammonia.

摘要

工业固体废弃物（粉煤灰和赤泥）已被用作制备钌基催化剂的载体。对赤泥进行了物理和化学处理，这些改性载体也用于制备钌基催化剂。采用N2吸附、H2吸附、XRD、XPS和程序升温还原（TPR）等多种技术对这些钌催化剂进行了表征，然后测试了其催化氨分解制氢的性能。结果发现，赤泥负载的钌催化剂比粉煤灰负载的催化剂表现出更高的氨转化率和产氢量。赤泥的热处理和化学处理极大地提高了催化活性。此外，酸处理和热处理相结合可产生最高的氨催化转化率。