A novel catalytic process for SNG synthesis

Akira Ninomiya, Misuzu Sato, Toshio Muraya, Tatsumi Ishihara, Yusaku Takita

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Abstract

Methane rich city gas has been synthesized by means of steam retorming of naphtha; however, the produced gas always contains significant concentration of CO and CO2. Therefore, development of a methane production process containing no CO and CO2 removal processes is strongly requested. Authors reported in the previous paper that C3H8→2CH4+C(1) took place over Ni/SiO2 with 90% selectivity. In this paper, the catalyst supports were studied and found that neutral SiO2 and α-Al2O3 are suitable but the activity was much reduced over Ni supported on acidic SiO2-Al2O3. Catalyst was diluted by various materials to avoid blocking-up by the deposited carbon. Several diluted materials affected the conversion, α-Al2O3 and basic MgO accelerated the reaction which may be due to interaction between Ni and dilution materials with direct contact. Over Ni/SiO2, reaction (1) took place with 90% selectivity, so that the produced gas always contained H2 formed by the C3H8→3C+4H2(2). It has confirmed that H2 in a high concentration of CH4 can be reacted with C3H8 to produce CH4. From these results, a following simple synthesis process can be constituted; the first step is CH4, H2, and solid C formation from C3H8, and the second step is succeeding H2 consumption process of the produced gas in the first step.

Original languageEnglish
Number of pages1
JournalNippon Kagaku Kaishi / Chemical Society of Japan - Chemistry and Industrial Chemistry Journal
Issue number4
Publication statusPublished - Dec 1 1999
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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