Synthesis of group IA alkali metal-aluminosilicates, and their hydrogen production abilities on methanol thermal decomposition

Title
Synthesis of group IA alkali metal-aluminosilicates, and their hydrogen production abilities on methanol thermal decomposition
Author(s)
강미숙이주현[이주현]이준수[이준수]
Keywords
FUEL-CELL APPLICATIONS; PARTIAL OXIDATION; STEAM; CATALYSTS; GENERATION; PROPANE; ETHANOL; CU/ZNO; PD/ZNO; BUTANE
Issue Date
201105
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ENERGY, v.36, no.5, pp.3293 - 3301
Abstract
This work investigates the hydrogen generation via methanol thermal decomposition (TD) over the three group IA alkali metals, Na, K, and Cs, incorporated into aluminosilicate catalysts (IA-AlxSiyOz). The scanning electron microscopy (SEM) images of the IA-AlxSiyOz catalysts revealed various and regular morphologies such as cube (Na), bouquet (K), and spherical (Cs), but the other two catalysts. K-alumina and silica, were irregular and non-uniform. The catalytic performances differed according to the alkali elements. The K-AlxSiyOz catalyst provided a significantly higher methanol decomposition and hydrogen production than the other catalysts: the H(2) production was maximized at 78% at a reaction temperature of 550 degrees C, CH(3)OH concentration of 30 vol-%, and gas hourly space velocity (GHSV) of 1800 h(-1). In an unusual result, carbon nano filaments were created over the K-AlxSiyOz catalyst after the reaction even though CO(2) and ethanol were not used. In the proposed mechanism, the group IA metals played an important role in depressing the strong acidities at the Al sites, and K was determined to be the most effective in increasing the hydrogen yield and suppressing the generation of CO and CO(2). (C) 2011 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/25227http://dx.doi.org/10.1016/j.energy.2011.03.025
ISSN
0360-5442
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이과대학 > 화학생화학부 > Articles
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