| 摘要 |
A process for the production of methanol comprises: (a) reacting a hydrocarbon feedstock with air to yield a gas stream containing nitrogen, hydrogen and carbon monoxide, (b) converting substantially all of the carbon monoxide in the gas stream into carbon dioxide, (c) separating out from the gas stream the nitrogen therein, and (d) reacting together the hydrogen and the carbon dioxide of the gas stream to produce methanol. Preferably the feedstock is natural gas, and the gas separation step is effected in two stages: (i) using a carbon dioxide absorption/desorption system to separate the carbon dioxide from the nitrogen and hydrogen, and (ii) using preferential adsorption or diffusion to split the nitrogen and the hydrogen. A feed gas pre-heated can also be used with advantage. |
