about 95 of the carbon monoxide content of the gas is converted to hydrogen according to the reaction the reaction is effected over a catalyst containing cobalt molybdenum and nickel at a temperature of 250 u00b0 c after the shift reaction the gas is washed once again in an amine wash to remove carbon dioxide the total content of hydrogen in the crude hydrogen gas obtained is then over 90 and corresponds to a flow of about 32 kmol h 2 per hour alternatively the crude process gas can be supplied to a psa plant pressure swing adsorption and concentrated to a purity exceeding 99 the pure hydrogen gas is transferred to an ao plant for producing hydrogen peroxide the hydrogen peroxide which is obtained 975 kg h calculated as a 100 solution is transferred to the bleaching plant of the sulphate pulp works a sulphate pulp works is equipped with a plant for gasifying black liquor which gasifier has been installed in order to decrease the load on the plant 39 s recovery boiler the capacity of the gasification plant is about 10 tons of dry matter per hour giving rise to a process gas production of about 28 000 nm3 hour a component stream 5600 nm3 hour of the process gas is drawn off from the main process gas stream for the production of hydrogen for producing hydrogen peroxide within the factory ______________________________________ co 12 dry gas.