Name
Address
Dr. Ahmed A. Ibrahim
Office: 1B 9
Tel: 00966-1-469-8591
Email: aidid@ksu.edu.sa
PO Box 800, King Saud University
Riyadh 11421 , Kingdom of Saudi Arabia
Title
Coke formation during CO2 reforming of CH4 over alumina-supported nickel catalysts
Author-s
Al-Fatish, A.S.A., Ibrahim, A.A. , Fakeeha, A.H. Soliman, M.A. , Siddiqui, M.R.H. ,
Abasaeed, A.E
Department
Major
citation
Year of
Publication
Publisher
Sponsor
Type of
Publication
ISSN
Chemical Engineering
Chemical Engineering
Applied Catalysis A: General : Volume 364, Issue 1-2, Pages 150-155
2009
Elsevier B.V.
Article
0926860X
URI/DOI
Full Text
(Yes,No)
Key words
Abstract
Yes
CH4 activation; CO2 reforming; Coke; Ni loading; Stability; Supported catalysts
Carbon dioxide reforming of methane to synthesis gas over Ni supported alumina catalysts
was investigated at atmospheric pressure. Two supports: high surface area γ-Al2O3 (SA6175) and low surface α-Al2O3 (SA-5239) were used for the preparation of catalysts by the
wet impregnation method. The reforming reactions were carried out using (CO2:CH4) feed
ratio of 1:1, and reaction temperatures 500, 600, 700 and 800 °C. Influences of Ni loading,
catalyst stability, coke deposition and synthesis gas ratio (H2/CO) were studied. Spent and
fresh catalysts calcined at 900 °C were characterized by XRD, SEM and TGA techniques.
It was observed that increasing Ni loading increases the formation of carbon. For high
surface area catalyst, at low Ni loading, no coke formation on the catalyst was obtained.
Similarly, no carbon formation was observed for low surface catalyst at 800 °C reaction
temperature with feed ratio of 1.3/1.0.