公开(公告)号：DE3103171A1

公开(公告)日：1981-12-10

申请号：DE3103171

申请日：1981-01-30

Applicant: AGENCY IND SCIENCE TECHN

Inventor： TAKAYA HARUO ,  HOSOYA TADASUKE ,  OGAWA KIYOSHI ,  SHIN SHIGEMITSU ,  ARAKI MICHIO ,  SUZUKI KUNIO ,  TODO NAOYUKI

IPC: B01J23/883 ,  B01J27/22 ,  B01J37/18 ,  C07C1/04 ,  B01J23/88 ,  C07C9/04

Abstract: The invention provides a novel highly heat-resistant solid catalyst for the methanation of hydrogen and carbon monoxide into methane. Different from conventional nickel catalysts, the inventive catalyst comprises a binary active ingredient composed of an alloy of nickel and molybdenum and a molybdenum carbide supported on a porous catalyst carrier. The catalyst is prepared by heating a catalyst intermediate comprising the oxides of nickel and molybdenum supported on the carrier in a gaseous mixture of hydrogen and carbon monoxide at 500 DEG -700 DEG C., preferably, following a step of hydrogen reduction at 400 DEG -900 DEG C. The most preferable catalyst carrier is a mixture or a composite oxide compound composed of magnesium and aluminum oxides. The methanation reaction can be carried out with the inventive catalyst at a much higher temperature, e.g. 650 DEG C., than with conventional catalysts so that the heat recovery from the gaseous product is greatly facilitated contributing to the energy economy.

公开(公告)号：DE2411888A1

公开(公告)日：1974-09-26

申请号：DE2411888

申请日：1974-03-12

Applicant: AGENCY IND SCIENCE TECHN

Inventor： TODO NAOYUKI ,  SATO TOSHIO ,  SUGI YOSHIHIRO

IPC: B01D53/86 ,  B01D53/94 ,  B01J23/00 ,  B01J23/70 ,  B01J23/72 ,  B01J23/86 ,  B01J37/20 ,  B01D53/34 ,  B01D53/00 ,  F01N3/14

Abstract: Catalyst for ren. of N oxides is industrial combustion gases with gaseous ammonia is selected from CuO and Fe2O3 and can be combined with an active alumina carrying Cr2O3. The catalyst system is pref. preliminarily treated with N2 or air contg. 50-2000 ppm SO2 at 200-450 degrees C, whereby the redn. of catalytic activity caused by moisture is eliminated (alternatively, the effluent gases may contain 50-1400 ppm SO2). The catalytic activity is stabe even at high temps. This catalyst system is cheaper than prior art systems.