C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
23/399, 260/710
C07C 9/04 (2006.01) B01J 19/14 (2006.01) C07C 1/02 (2006.01) C07C 1/04 (2006.01) C07C 1/06 (2006.01)
Patent
CA 1119621
ABSTRACT A PROCESS AND A PLANT FOR PREPARING A GAS RICH AN METHANE The invention relates to an improved catalytic methanation process wherein a feed gas containing predominantly hydrogen and being rich in carbon oxides (CO and/or CO2) is divided into two part streams of which the first is methanated partially in an adiabatic methanation reactor by a methanation catalyst whereafter the effluent from the adiabatic methanation reactor is united after cooling with the second feed gas part stream and the thus-combined stream is methanated in a cooled methanation reactor by a methanation catalyst, preferably the same as that used in the adiabatic methanation reactor. It is possible, but not always necessary, to recycle part of the recycle gas to the adiabatic methanation reactor to keep the temperature therein at a moderate level. The process is useful in connection with transport of energy from a nuclear reactor. It is advantageous because it can be operated to produce superheated steam, for use, e.g. for producing electricity, in connection with the cooling of the effluent from the adiabatic reactor, whereby energy losses can be reduced to a very low level; and because the amount of recycle gas is reduced, possibly to nil, whereby energy is saved.
341331
Goudreau Gage & Associates
Haldor Topsoe A/s
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