Universiti Teknologi Malaysia Institutional Repository

Microreactor for catalytic partial oxidation of methane

Puwanto, Widodo Wahyu and Muharam, Yuswan (2006) Microreactor for catalytic partial oxidation of methane. In: 1st International Conference on Natural Resources Engineering & Technology 2006, 24-25th July 2006, Putrajaya, Malaysia.

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Abstract

Fixed-bed reactors for partial oxidation of methane to produce synthetic gas bear a hot-spot problem. To avoid this problem, an alternative reactor, which is called shell and tube type microreactor, has been developed in this work. Combustion and reforming reactions are integrated in this reactor. The microreactor used in this work consists of a 1 cm outsidediameter, 0.8 cm inside-diameter and 11 cm length tube, and a 1.8 cm inside-diameter shell. The tube is made of dense alumina and the shell of quartz. Two different methods ? dip and spray coating ? were performed to coat the tube side with LaNixOy catalyst. Gaseous reactants burn in the tube side to produce flue gases which in turn flow countercurrently and react in the shell side to yield reforming products. The methane conversion reaches 97% at 700oC with the catalyst spray-coated tube, while the catalyst dip-coated tube reaches only 7.78%. Turnover frequencies (TOF) using the catalyst sprayed and dip-coated tubes are 5.75 x 10-5 and 2.24 x 10-5 mol/gram cat.s, respectively. The hydrogen to carbon monoxide ratios produced are greater than the stoichiometric ratio, which are probably caused by carbon deposit through methane cracking and Boudouard reactions.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Micro reactor; catalytic partial oxidation; coating.
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:289
Deposited By: Cik Rasyidah Mohd Daud
Deposited On:15 Feb 2007 10:30
Last Modified:01 Jun 2010 02:42

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