Acetaldehyde Production from Ethanol over Ni-Based Catalysts
Arthit Neramittagapong, Wiphada Attaphaiboon and Sutasinee Neramittagapong* Author for corresponding; e-mail address: artner@kku.ac.th
Volume: Vol.35 No.1 (JANUARY 2008)
Research Article
DOI:
Received: 28 September 2007, Revised: -, Accepted: 16 November 2007, Published: -
Citation: Neramittagapong A., Attaphaiboon W. and Neramittagapong S., Acetaldehyde Production from Ethanol over Ni-Based Catalysts, Chiang Mai Journal of Science, 2008; 35(1): 171-177.
Abstract
The aim of this work was to study the catalytic ethanol dehydrogenation to acetaldehyde over nickel based catalysts. SnO2 , Al2O3 and SiO2 were used as supporting materials. The reactions were carried out in a catalytic flow system operated in the temperature range of 200 and 350oC under atmospheric pressure. Various parameters such as Ni loading, a kind of supporting materials, contact time on the ethanol conversion and selectivity to acetaldehyde were investigated. The main product in all cases is acetaldehyde, with secondary products such as ethyl acetate and diethyl ether. It has been found that Ni/SnO2 showed the highest ethanol conversion with high selectivity to acetaldehyde. The 10 wt% Ni/SnO2 exhibited the highest yield of acetaldehyde at 300oC with low contact time (0.05g min ml-1 ). The deactivation of 10 wt% Ni/SnO2 was occurred after 200 minutes on stream due to the formation of Ni – Sn alloy phase