| 摘要 |
<p>Methanation reactions and, more particularly an improved process for the catalytic methanation of gases such as "synthesis gas". In more detail a process for the methanation of synthesis gas comprises reacting together CO, CO2 and H2 (1) by successive contact steps thereof with: (a) a catalyst (4) comprising a solid support having deposited thereon a metal selected from the group consisting of Fe, Co, Ni, Cu, W, Ru, Rh, Pd, Ir, Pt alloys of the said metals with each other and alloys containing an aggregate of at least 1% by weight of one or more of the said metals with other metals, and, (b) an inert body or assembly of bodies (5) having a substantial surface area with which the gases make contact subsequent to their contact with the said catalyst, the said inert body or assembly of bodies having sprayed on to it or them (6, 7) a liquid medium which removes heat from the gases and thereby has its temperature raised and/or is evaporated, the rate of supply of the liquid medium, its specific heat, its latent heat of vaporisation and the other conditions of the process being such that the temperature of the gas emerging from the body or assembly of bodies is not higher than 600 C and that the entire quantity of liquid medium is evaporated before its passage along the inert body or assembly of bodies is complete (8). </p> |
