このエントリーをはてなブックマークに追加
ID 34804
file
creator
Furumoto, Yoshiyasu
Ide, Yusuke
subject
Ethanol
Propylene
ZSM-5
Phosphorous
Lanthanum
NDC
Biology
abstract
Conversion of ethanol to propylene was carried out over HZSM-5(Ga) co-modified with lanthanum and phosphorous (La/P/HZSM-5(Ga)). The propylene yield was strongly dependent on both the La/Ga and P/Ga ratios, and the highest value of ca.29 C-% was obtained at a P/Ga ratio of 1 and a La/Ga ratio of 0.4. FT-IR, P-31 MAS NMR, and Ga-71 MAS NMR measurements demonstrate that the introduced lanthanum reacts with the pre-introduced phosphorous to regenerate some of Bronsted acid sites (Si(OH)Ga), and accordingly, the Bronsted acid sites are homogeneously distributed within the zeolite framework. In addition, the catalytic stability as well as the catalytic activity of HZSM-5(Ga) was effectively enhanced by co-modification with lanthanum and phosphorous because of the suppression of carbonaceous deposition and elimination of gallium from the zeolite framework.
journal title
Applied Catalysis A: General
volume
Volume 417
start page
137
end page
144
date of issued
2012
publisher
Elsevier Science BV
issn
0926-860X
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
(c) 2012 Elsevier Inc. All rights reserved.
relation url
department
Graduate School of Engineering