METHOD FOR FISCHER-TROPSCH SYNTHESIS AND FOR UTILIZING EXHAUST

摘要

Provided in the present invention is a method for a Fischer-Tropsch synthesis and for utilizing an exhaust with the steps of: after transformation and purification, introducing a Fischer-Tropsch synthesis raw material gas into a Fischer-Tropsch synthesis reactor, where the operating conditions for the Fischer-Tropsch synthesis are a temperature between 150°C and 300°C and a pressure between 2 and 4 MPa(A), using an iron-based or cobalt-based catalyst in a Fischer-Tropsch reaction to produce a liquid hydrocarbon product; 2) introducing a Fischer-Tropsch synthesis exhaust produced in step 1) into a pressure swing adsorption hydrogen-separation apparatus, extracting hydrogen gas from the Fischer-Tropsch synthesis exhaust, where the purity of the hydrogen gas is controlled between 80% and 99%; 3) using the pressure swing adsorption apparatus to extract methane from the exhaust in step 2), where the purity of the methane is controlled between 80% and 95%; step 4) sending a portion of the hydrogen extracted by pressure swing adsorption in step 2) to be mixed with the Fischer-Tropsch synthesis raw material gas, and, after transformation and purification, to be used for adjusting the hydrogen-carbon ratio of the Fischer-Tropsch synthesis raw material gas; 5) introducing the methane produced in step 3) into a methane reforming process for a reforming reaction, producing a synthetic gas of a high hydrogen-to-carbon ratio, then sending to step 1) to be mixed with the Fischer-Tropsch raw material gas and be used to adjust the hydrogen-carbon ratio of the Fischer-Tropsch raw material gas.