Dimethyl ether synthesis on the admixed catalysts of Cu-Zn-Al-M (M = Ga, La, Y, Zr) and γ-Al2O3: The role of modifier

Title
Dimethyl ether synthesis on the admixed catalysts of Cu-Zn-Al-M (M = Ga, La, Y, Zr) and γ-Al2O3: The role of modifier
Authors
A. VenugopalJ. Palgunadi정광덕주오심신채호
Keywords
DME; Cu based catalysts; Hydrotalcite-like structure; Methanol synthesis; DME synthesis; Methanol dehydration
Issue Date
2009-04
Publisher
Journal of molecular catalysis A, Chemical
Citation
VOL 302, NO 1-2, 20-27
Abstract
Dimethyl ether synthesis has been conducted on the admixed catalysts of Cu based catalysts (for methanol synthesis) and γ-Al2O3 (for methanol dehydration). The Cu-Zn-Al-M (M = Ga, La, Y, Zr) hydrotalcite-like structures as catalyst precursors for methanol synthesis part of the admixed catalysts are synthesized by the co-precipitation method. The physico-chemical characteristics of the catalysts are analyzed by BET-surface area, XRD, TPR, SEM/EDS, XPS and N2O pulse chemisorption studies. DME synthesis experiments showed that the CO conversion and DME yield are linearly correlated with Cu metal surface areas of Cu based catalysts admixed with γ-Al2O3, indicating that methanol synthesis rate can control the overall DME synthesis rate. The yttrium-modified Cu-Zn-Al admixed catalysts showed the superior activity with a DME yield of 47.7% to other Cu-based catalysts. The reason may be attributed to the increase in Cu metal surface area by the addition of yttrium.
URI
http://pubs.kist.re.kr/handle/201004/36748
ISSN
1381-1169
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KIST Publication > Article
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