Process for realizing natural gas preparation with coke oven gas by using anaerobic microbes
An anaerobic microorganism, coke oven gas technology, applied in sustainable manufacturing/processing, gas fuel, chemical industry, etc., can solve the problems of high investment and operation cost, low conversion efficiency of alkane gas, etc.
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Embodiment 1
[0023] With 1 volume of coke oven gas (H 2 Content 60%, CO content 8%, CH4 content 25%, CO 2 Content 3%), with 0.06 volume of CO 2 Mixed, passed into the high temperature (55 ℃) CSTR anaerobic reactor, the microorganisms were inoculated with the sludge of the high temperature anaerobic reactor for cow dung, and the highly active anaerobic microorganisms had passed through the H 2 , CO, CO 2 The substrate was pre-acclimated and cultured in a nutrient salt liquid medium containing peptone and dipotassium hydrogen phosphate. The reactor was mechanically stirred at a stirring speed of 400rpm. The residence time of the mixed gas in the reactor is controlled at 1 hour, and every 1.07 volume of the mixed gas can produce about 0.5 volume of the mixed gas, wherein the methane content is about 90%. The resulting mixed gas is further purified through pressure swing adsorption separation to obtain natural gas with a methane content of more than 98%.
Embodiment 2
[0025] With 1 volume of coke oven gas (H 2 Content 60%, CO content 8%, CH4 content 25%, CO 2 Content 3%), with 0.06 volume of CO 2 Mixed, passed into the medium temperature (35 ℃) upflow anaerobic sludge expanded bed reactor (UASB), the microorganisms were inoculated with the medium temperature anaerobic granular sludge, and the highly active anaerobic microorganisms had been passed through the H 2 , CO, CO 2 It was pre-acclimated to the substrate and cultured in nutrient liquid medium containing peptone and dipotassium phosphate. The residence time of the mixed gas in the reactor is controlled at 3 hours, and every 1.07 volume of the mixed gas can produce about 0.45 volume of the mixed gas, wherein the methane content is about 90%. The resulting mixed gas is further purified through cryogenic separation to obtain natural gas with a methane content of more than 98%.
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