A kind of coal catalytic gasification method
A coal catalytic gasification and catalyst technology, applied in the field of coal gasification, can solve the problems of catalyst loss, gasification equipment corrosion, low melting point, etc., and achieve the effects of high recovery rate, low corrosion and low corrosion
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Embodiment 1
[0030] Example 1: In this example, low-rank coal Beijiang peat is used as a sample, sodium aluminate is used as a catalyst, and a fixed-bed gasifier is used to load sodium aluminate onto peat by solution impregnation method. The catalyst loading steps are as follows:
[0031] 1) The mass ratio of water to sodium aluminate is 20, and the mixture is stirred at 60°C until completely dissolved;
[0032] 2) The mass of the alkali metal element Na is 1 wt% of the coal mass, adding peat into the solution, stirring and maintaining the temperature until a slurry is formed;
[0033] 3) The obtained coal slurry was dried at 110° C. for 12 hours to obtain catalyst-loaded peat.
[0034] Take Beijiang peat loaded with sodium aluminate and add it to a fixed-bed gasifier. The mass of alkali metal element Na is 1 wt% of the coal mass. The gasification temperature is 600°C and the pressure is 0.1MP. Air and CO 2 Gasification, air / coal mass ratio 1.8, CO 2 / coal mass ratio is 3. The gasificat...
Embodiment 2
[0035] Example 2: In this example, low-order Xiaolongtan lignite is used as a sample, sodium aluminate is used as a catalyst, gasified in a fluidized bed gasifier, and the catalyst is loaded on the coal by mechanical mixing. The catalyst loading steps are as follows:
[0036] The mass of the alkali metal element Na is 4wt% of the mass of the coal, and the coal and sodium aluminate are ground for 5 minutes on a vibrating coal mill to obtain lignite loaded by mechanical mixing.
[0037] Take the lignite loaded with sodium aluminate and put it into the fluidized bed gasifier. The mass of alkali metal element Na is 4wt% of the coal mass, the pressure is 1MP, the gasification temperature is 900°C, the gasification agent is air and water vapor, air / coal The mass ratio is 2.4, and the steam / coal mass ratio is 2. The gasification residue has a liquid-solid ratio of 40. Put the gasification residue into water, stir and leach for 1 hour at a temperature of 50°C, filter and wash the filt...
Embodiment 3
[0038] Example 3: In this example, high-grade Jincheng anthracite is used as a sample, sodium aluminate and sodium silicate are used as catalysts, gasified in an entrained bed gasifier, and sodium aluminate and sodium silicate are loaded on the anthracite by spraying , the catalyst loading steps are as follows:
[0039] 1) The mass ratio of sodium aluminate to sodium silicate is 1, the mass ratio of water to sodium aluminate is 10, the mass ratio of water to sodium silicate is 10, and the mixture is stirred at 60°C until completely dissolved;
[0040] 2) The mass of the alkali metal element Na is 6.5wt% of the mass of the coal, the catalyst solution is loaded onto the coal in the form of spraying, and dried at 110° C. for 12 hours to obtain the catalyst-loaded coal.
[0041] Take the catalyst-loaded coal and put it into the entrained-flow gasifier. The mass of the alkali metal element Na is 6.5wt% of the coal mass, the mass ratio of sodium aluminate to sodium silicate is 1, th...
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