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Document Details
Document Type
Document Title
: Article In Conference
: Self-Combustion Synthesis of Nanocrystalline
CuO and CuMn2O4 Powders Used as
Methanol Synthesis Catalyst for Direct
Dimethyl Ether Synthesis from Syngas
Self-Combustion Synthesis of Nanocrystalline
CuO and CuMn2O4 Powders Used as
Methanol Synthesis Catalyst for Direct
Dimethyl Ether Synthesis from Syngas
Subject
Document
Language
Abstract
: ‫ءك يم يا‬
: English
: In this study, nanocrystalline powders
consisting of CuO and CuMn2O4 have been
synthesized by means of a simple combustion
synthesis technique using sorbitol as fuel and
cupric nitrate and manganese (II) nitrate as
oxidant. The starting materials were mixed
thoroughly with adding a small amount of
ammonia solution and then ignited in the air at
250 °C. It underwent a self-combustion process
with a large amount of smoke. The assynthesized powders were characterized by Xray diffraction (XRD) analysis, transmission
electron microscope (TEM), scanning electron
microscope (SEM), surface area measurements,
and sinterability. Experimental results revealed
that the nanocrystalline powders show high
specific surface area and possess small primary
crystallite size. Specific surface area and
primary crystallite particle size of the powders
were ~60 m/g and 10~25 nm, respectively,
through the stoichiometric fuel/oxidizer ratio
reaction. In addition, the thermal
decomposition and combustion process of the
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reactant mixture were investigated using
thermogravimetry (TG) and differential
scanning clorimetry (DSC). Nanocrystalline
CuO and CuMn2O4 Powders were physically
admixed with Y-tpye zeolite methanol
dehydration catalyst to form hybrid catalysts.
The one-step synthesis of dimethyl ether
(DME) from syngas was carried out over the
hybrid catalyst under pressurized fixed-bed
continuous flow conditions. About 62% CO
per-pass conversion and 63% DME selectivity
could be achieved under the pressure of 2.0
MPa, the temperature of 260 °C, the ratio
H2/CO of 3/2 and the space velocity of 1800 h
-1.
: Tenth International Symposium on
Heterogeneous Catalysis
: From : 22/8/1429 AH - To : 26/8/1429 AH
From : 23/8/2008 AD - To : 27/8/2008 AD
: 1429 AH
2008 AD
: Article
: Wednesday, February 18, 2009
Researchers
Researcher Name Researcher Name Researcher
Dr
Email
(Arabic)
(English)
Type
Grade
Xiu-Juan Tang
Xiu-Juan Tang
Researcher Doctorate
Jin-Hua Fei
Jin-Hua Fei
Researcher Doctorate
Xiao-Ming Zheng Xiao-Ming Zheng Researcher Doctorate
Hui Lou
Hui Lou
Researcher Doctorate
Files
File Name
18493.pdf
Type
pdf
Description
Deanship of Information Technology - King Abdulaziz University. All rights reserved