A method for co-producing low-carbon alcohols by producing methane from carbonaceous materials
A low-carbon alcohol and carbon-based technology, applied in chemical instruments and methods, hydrocarbon production from carbon oxides, preparation of organic compounds, etc., can solve the problems of reducing carbon use efficiency, low catalyst efficiency, increasing energy consumption, etc. The effect of saving energy consumption, low equipment utilization rate and improving utilization rate
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Embodiment 1
[0047] This example is used to illustrate the method for producing methane and co-producing low-carbon alcohols from carbonaceous materials provided by the present invention.
[0048]Lignite fragments with a particle size of 5-50 mm (see Table 1 for chemical composition) are gasified into crude synthesis gas with oxygen / water vapor as a gasification agent, and the obtained crude synthesis gas is sequentially cooled, detarred, crude desulfurized, After the fine desulfurization process, the net syngas (see Table 2 for the composition) is obtained, in which (CO+H 2 ) content is 63% by volume, H 2 / CO molar ratio is 1.59;
[0049] The net synthesis gas is divided into two streams, G1 and G2. G1 is sent to the synthesis reactor after heat exchange and temperature rise, and is contacted and reacted with a fixed bed of mixed catalyst. The catalyst bed is composed of water gas shift catalyst and synthetic low-carbon alcohol The catalysts are mixed, and the mass ratio of the two is 3...
Embodiment 2
[0052] The preparation and composition of the net synthesis gas was the same as in Example 1. The entirety of this net synthesis gas is divided into two streams G1 and G2. Among them, G1 is sent to the synthesis reactor after heat exchange and temperature rise, and is contacted with the mixed catalyst fixed bed for reaction. The catalyst bed is formed by mixing the water gas shift catalyst and the synthetic low-carbon alcohol catalyst, and the mass ratio of the two is 4:1. , wherein the water gas shift catalyst is a Co-Mo catalyst (the manufacturer is Qingdao Lianxin Company, trade name QDB-03), and the composition of the synthetic low-carbon alcohol catalyst is: 50% by weight ZnO-47% by weight Cr 2 o 3 -3% by weight K 2 O; the inlet temperature of the composite reactor is 305°C, the outlet temperature is 342°C, the pressure is 10.33MPa, and the gas space velocity is 4500h -1 , the reacted product is cooled to 40°C by indirect heat exchange, and divided into gas stream G a...
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