PROCESS FOR PRODUCING SYNTHETIC LIQUID HYDROCARBONS FROM NATURAL GAS

摘要

The invention is used in a process for synthesizing C5 and higher hydrocarbons from natural gas through intermediate conversion of natural gas to synthesis gas and subsequent conversion of CO and H2 by Fischer-Tropsch synthesis. The process comprises steam reforming of natural gas in a steam reforming reactor to form synthesis gas, separating carbon dioxide from the synthesis gas by a liquid absorption method to a residual carbon dioxide content in the synthesis gas no more than 5 vol. %, separating an excess of hydrogen from the synthesis gas by a hydrogen-permeable membrane apparatus to a H2:CO molar ratio in the range of 1.9 to 2.3 and synthesizing liquid hydrocarbon from the synthesis gas by Fischer-Tropsch synthesis.