Temperature programmed desorption studies on a new active zinc oxide catalyst

被引：19

作者：

Naik, SP ^{[1
]}

Fernandes, JB ^{[1
]}

机构：

[1] Goa Univ, Dept Chem, Talegao 403806, Goa, India

来源：

THERMOCHIMICA ACTA | 1999年 / 332卷 / 01期

关键词：

temperature programmed desorption; infrared spectroscopy; zinc oxide catalyst;

D O I：

10.1016/S0040-6031(99)00063-5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The present work describes the characterisation of a new active zinc oxide catalyst by combined study of temperature programmed desorption (TPD) of adsorbed ammonia and infrared (IR) spectroscopy of ammonia adsorbed at different levels. This zinc oxide showed an unusually high acidity similar to 7.0145 mmol/g in terms of adsorbed ammonia. TPD profile gave three distinct regions at 433, 573 and 673 K unlike other zinc oxide sample which showed only two distinct peaks at low and medium temperatures. Attempts are made to classify these peaks into strong and weak B and L acid sites, with complementary evidence from IR spectroscopic studies. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：21 / 25

页数：5

共 12 条

[1]

[Anonymous], 1988, APPL CATAL, DOI DOI 10.1016/S0166-9834(00)80378-4

[2] DEFINITION OF POLYCRYSTALLINE ZNO CATALYTIC SITES AND THEIR ROLE IN CO HYDROGENATION [J].