To provide a method for improving a product yield and dispensing with separating higher-order hydrocarbons for combustion and disposal thereof, when natural gas obtained from a gas well is completely converted into methane by subjecting the natural gas containing hydrocarbons having two or more carbon atoms to hydrogenation treatment so as to be converted into pure methane, and the pure methane is required as a product.
A catalyst is used, in which an iron group element in the metal state is carried as an active species on a carrier which has a composition, in terms of atom% based on metals in the elemental state, comprising (A)18-70 atom% Zr, (B) 1-20 atom% one or two or more kinds (in the case of two or more kinds, the total) of tetragonal zirconia structure stabilizing elements (Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ca, Mg), and (C) a 25-80 atom% iron element (in condition that Ni occupies an atom ratio of ≥0.6), and which is stabilized by taking even a part of the iron group element together with the stabilizing elements into a crystal structure; and mixed gas comprising natural gas and hydrogen is brought into contact with the catalyst, to thereby subject hydrocarbons having two or more carbon atoms to hydrocracking so as to be converted into methane.
TAKANO HIROYUKI
KUMAGAI NAOKAZU
IZUMIYA KOICHI
SHINOMIYA HIROYUKI
HASHIMOTO KOJI
| JP2010022944A | 2010-02-04 | |||
| JP2011206770A | 2011-10-20 | |||
| JPS4740524B | ||||
| JP2001017860A | 2001-01-23 |
JPN6011034977; Ｍｉｃｈｉａｋｉ ＹＡＭＡＳＡＫＩ ｅｔ ａｌ．: 'Ｃｏｍｐｏｓｉｔｉｏｎａｌ ｄｅｐｅｎｄｅｎｃｅ ｏｆ ｔｈｅ ＣＯ２ ｍｅｔｈａｎａｔｉｏｎ ａｃｔｉｖｉｔｙ ｏｆ Ｎｉ／ＺｒＯ２ ｃａｔａｌｙｓｔｓ ｐｒｅｐａｒｅｄ ｆｒｏｍ ａｏｒｐｈｏｕｓ' Ａｐｐｌｉｅｄ Ｃａｔａｌｙｓｉｓ Ａ： Ｇｅｎｅｒａｌ １６３, 1997, ｐｐ． １８７-１９７