Logo

PREPARATION AND CHARACTERIZATION OF HYBRID CATALYSTS FOR CO2 HYDROGENATION REACTION

Ramli, M. Z. and Mohd Zabidi, N. A. and Chong, F. K (2007) PREPARATION AND CHARACTERIZATION OF HYBRID CATALYSTS FOR CO2 HYDROGENATION REACTION. [Citation Index Journal]

[img] PDF
Restricted to Registered users only

338Kb

Abstract

Hybrid catalytic system comprising different ratios of CuO/ZnO/Al2O3: zeolite have been formulated and characterized. The methanol-synthesis catalyst, Cu/ZnO/Al2O3 (CuO:ZnO:Al2O3 = 50:45:5), was prepared by a co-precipitation method. The copper catalyst was physically mixed with ZSM-5 zeolite at ratios of 1:1, 1:2 and 2:1. The hybrid catalysts were characterized using x-ray diffraction method (XRD), temperature-programmed reduction (TPR) and temperature-programmed desorption (TPD) with ammonia. The hybrid catalysts produced two different acid sites as depicted by the ammonia TPD profiles. A TPD peak at 300°C indicated a weak acid site and a stronger acid site were observed at 550 °C. The hybrid catalyst with a 1:1 weight ratio has the highest acid strength and absorbed the most hydrogen. This hybrid catalyst may be used in the hydrogenation of CO2 to methanol and dimethyl ether.

Item Type:Citation Index Journal
Subjects:Q Science > QD Chemistry
Departments / MOR / COE:Mission Oriented Research > CO2 Management
ID Code:1008
Deposited By: Assoc Prof Dr Noor Asmawati Mohd Zabidi
Deposited On:12 Apr 2010 12:32
Last Modified:19 Jan 2017 08:27

Repository Staff Only: item control page

Document Downloads

More statistics for this item...