A METHOD FOR PRODUCING AN EXTRACT FROM GANODERMA LUCIDUM CONTAINING GANODERIC ACID

摘要

A process for removing carbon monoxide from a gas stream containing hydrogen, carbon monoxide and carbon dioxide comprising subjecting the gas stream to a first stage high temperature selective catalytic methanation to lower the carbon monoxide concentration in the gas but not below a concentration which allows carbon dioxide methanation to take place followed by a second stage low temperature selective catalytic methanation to lower the residual carbon monoxide in the gas stream to a concentration below 40 ppm. The high temperature methanation is suitably carried out at a temperature between 250 °C and 350 °C and the low temperature methanation is suitably carried out at a temperature below 270 °C.