Method for synthesizing wax by using volatile components in low-rank coal by fischer-tropsch synthesis

Abstract

The invention provides a method for synthesizing wax by using volatile components in low-rank coal by fischer-tropsch synthesis, low-rank coal sequentially is subjected to drying and gasification reduction treatment to obtain an oil-gas mixture, wherein the gasification reduction process is a chemical reaction process for heating the dried low-rank coal under oxygen-free or micro-oxygen conditions; an oil-gas mixture is purified to obtain a mixed gas; the mixed gas is subjected to partial hydrocarbon reforming conversion process to obtain a reforming conversion gas containing CO and H2, CO2 isremoved from the reforming conversion gas, and the reforming conversion gas is supplemented with CO or H2 to obtain a synthesis gas with the hydrogen-carbon ratio of 1.5-2.2; the synthesis gas is subjected to fischer-tropsch synthesis under the action of a catalyst and is subjected to oil-gas separation to obtain a hydrocarbon mixture and tail gas, and the hydrocarbon mixture is subjected to distillate oil stripping and the like so as to obtain wax, heavy oil and naphtha. According to the invention, the volatile components in the low-rank coal are used for producing light oil, the heavy oil and the wax by using a fischer-tropsch synthesis technology, transport is facilitated, the utilization rate of resources is improved; moreover, the raw material sources are wide, the process energy consumption is low, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of clean utilization of coal substances, in particular to a method for utilizing volatile Fischer-Tropsch wax in low-rank coal. Background technique [0002] my country is a country rich in coal, poor in oil, and low in gas. Coal consumption accounts for more than 60% of primary energy consumption, which determines that it will be difficult to change the coal-based energy structure for a long period of time. Judging from the proven quality of coal mines, the proportion of middle and low-rank coal in my country is very large, so it is particularly important to use middle and low-rank coal reasonably and efficiently to produce high-quality chemical products. [0003] At present, the methods and means of utilizing coal resources in our country are relatively simple, and they are simply burned to obtain the combustion chemical energy. This simple utilization method is not only a huge waste of energy resources, b...

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Problems solved by technology

Therefore, using Fischer-Tropsch synthesis to produce gasoline is not the best way

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