Atmospheric production process for substitute natural gas from saturated hydrocarbons 1. Utilization of catalytic reaction for atmospheric methane formation
A. Ninomiya et al., Atmospheric production process for substitute natural gas from saturated hydrocarbons 1. Utilization of catalytic reaction for atmospheric methane formation, KAG KOG RON, 25(2), 1999, pp. 316-321
In order to develop a novel production process for substitute natural gas (
SNG), SiO2-supported metal catalysts effective for methane formation from p
ropane and butanes are investigated under atmospheric pressure. Two reactio
ns, namely, methane formation, C3H8 --> 2 CH4 + C, and decomposi- tion, C3H
8 --> 3 C + 4 H-2, took place over the analyzed metal supported catalysts.
The highest activity is measured for Ni/SiO2, revealing 100 % conversion an
d over 90 % selectivity for methanation at 500 degrees C. As far as the act
ivities of other metal supports are concerned, the order is found to be Ni
much greater than Co>Fe> Pt>Pd. Butanes show 95 similar to 99 % conversion
and 80 % selectivity over Ni/SiO2 at 500 degrees C. Adopting the condition
of less than 2,700 h(-1) is found suitable for selective CHI formation. Sup
plying the feed of C-3 H-8/H-2 = 0.5, only hydrogenolysis of propane takes
place over Ni/SiO2 above 250 degrees C, and the conversion reachs 90 % and
100 % at 350 degrees C and 500 degrees C, respectively.