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Effect of Strontium Modification in Mg-Al Mixed Oxide Catalysts on Product Distribution toward Catalytic Reaction of
Patchaporn Seekhiaw1,2, Sasiradee Jantasee3, Piyasan Praserthdam1,2
1Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
Abstract:
The aim of this research was to examine the effect of strontium content in the MgAlO catalyst for the catalytic ethanol reaction on the product distribution. The structure of the catalysts and the actual amount of strontium on the catalysts were verified using XRD and ICP techniques, respectively. The acid and basic strength characteristics of catalysts were examined using NH3-TPD and CO2-TPD techniques, respectively. The strontium content was found to influence the textural properties and the acidic and basic characteristics of the catalysts, leading to differences in product selectivity and ethanol conversion. The MgAlO catalyst with 1.9 wt % strontium provided the maximum ethylene and butanol selectivity, probably due to the presence of appropriate medium acidic and strong basic sites. All catalysts can efficiently produce ethylene by a dehydration reaction and acetaldehyde by a dehydrogenation reaction. Acetaldehyde selectivity was dominant with increased strontium loading.
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