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Method for processing Fischer-Tropsch synthesis tail gas

A technology for Fischer-Tropsch synthesis and exhaust gas treatment, which is applied in air quality improvement, separation methods, and dispersed particle separation to achieve the effect of saving investment and improving utilization.

Active Publication Date: 2012-08-01
SYNEFUELS CHINA
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  • Abstract
  • Description
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Problems solved by technology

[0005] At present, there are few reports on the process of preparing high-purity hydrogen from Fischer-Tropsch synthesis tail gas

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  • Method for processing Fischer-Tropsch synthesis tail gas
  • Method for processing Fischer-Tropsch synthesis tail gas

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Process description

[0022] Such as figure 1 The flow diagram shown is the whole process of Fischer-Tropsch synthesis tail gas treatment in this patent, which includes four process steps of partial oxidation of light hydrocarbons, shifting, decarburization, and PSA pressure swing adsorption.

[0023] 1) Partial oxidation of light hydrocarbons: the oxygen (flow 19816.4kg / h, temperature 40°C, pressure 5.1MPa) and water vapor (flow 5258kg / h, pressure higher than 4.2MPa) from the air separation are passed into the waste to be treated In the Tropsch synthesis tail gas (flow rate 26635.6kg / h, temperature 40°C, pressure 4.2MPa, see stream 101 for the composition), catalytic conversion is used at an operating temperature of 1200°C to convert the low-carbon hydrocarbons and other carbon-containing compounds contained in the tail gas to change ...

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Abstract

The invention provides a method for preparing hydrogen with high purity by using Fischer-Tropsch synthesis tail gas, the method comprises four steps of light hydrocarbon partial oxidation, transformation, decarburization and pressure swing adsorption, and hydrogen with purity of more than 99% can be obtained. The invention has the advantages of simple process, high process integration degree, high produced hydrogen purity, and the method of the invention can be used for recovering and utilizing Fischer-Tropsch synthesis tail gas during the process of transforming carbonaceous resources of coal, natural gas, biomass and the like into liquid fuels.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis tail gas treatment process, specifically, a method for obtaining high-purity hydrogen through a combined process of partial oxidation conversion of light hydrocarbons, conversion, decarburization, and PSA pressure swing adsorption unit processes. Background technique [0002] Fischer-Tropsch synthesis is a method of indirectly synthesizing oil products (Fischer-Tropsch synthesis, FTS for short) using coal, natural gas, biomass and other carbon-containing resources as raw materials. Its products are generally composed of heavy oil, light oil, wax, synthetic Water (including alcohols, aldehydes, ketones, acids, esters and other organic oxygen compounds), CO 2 , methane, low carbon hydrocarbons (C 6 The following gaseous alkanes), unreacted synthesis gas (H 2 , CO) and nitrogen. After treatment and separation, the Fischer-Tropsch synthesis products can be finally divided into liquid hydrocarbons, sol...

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Application Information

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IPC IPC(8): B01D53/76B01D53/72B01D53/62
CPCY02A50/20
Inventor 李永旺马林玉邵华鑫余晓忠郝栩
Owner SYNEFUELS CHINA
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