Modified method to produce biomass synthetic natural gas
A technology for synthesizing natural gas and biomass, applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problem of low methane rate, achieve broad application prospects, improve efficiency, and reduce the possibility of deactivation
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Embodiment 1
[0028] An improved method for producing biomass synthetic natural gas, the specific steps are as follows:
[0029] Step 1, a conventional gasification step;
[0030] Step 2, conventional purification and adjustment steps;
[0031] Step 3, conventional methanation step;
[0032] Step 4, hydration step: cooling the methanated product, then using the FICFB method to synthesize SNG through a single-stage fluidized bed, passing SNG into a 3mol / L tetrabutylammonium fluoride solution and maintaining it at a constant temperature, CH 4 Hydrates are formed in the solution, and other gases will escape, and then the hydrates and gases can be separated by filtration, that is, methane is obtained. Most of the gases escaped during the hydration step are CO 2 , can be used as a raw material for generating methane. Since the methanation reaction is a reversible reaction, increasing the concentration of reactants will inevitably lead to the positive reaction. The gas escaped from the hydratio...
Embodiment 2
[0034] An improved method for producing biomass synthetic natural gas, the specific steps are as follows: conventional gasification steps, purification and adjustment steps are performed, and the biomass gas after the second desulfurization is collected in a fluidized bed methanation reactor for In the process of tempering and methanation, the exported gas is denitrified. Since the FICFB method is used to produce methane, the conversion rate of methane in the methanation reactor is only 64%, which means that the biomass gas after denitrification treatment still contains a lot of H 2 , CO, CO 2No methanation was performed. Since the gases coming out of the methanation reactor are all high-temperature gases, the formation of hydrates requires a temperature close to the atmosphere of 302K. Therefore, the surface cooler can be directly used to cool down the biomass gas, and the hot water from the surface cooler can be used as domestic hot water, and the heat will not be wasted. ...
Embodiment 3
[0036] An improved method for producing biomass synthetic natural gas, the specific steps are as follows:
[0037] Step 1, a conventional gasification step;
[0038] Step 2, conventional purification and adjustment steps;
[0039] Step 3, the conventional methanation step, the temperature in the methanation step is 300°C, this temperature is more suitable for the methanation reaction, the methanation reaction is an exothermic process, if the temperature is not properly controlled, the temperature will rise too high , resulting in catalyst deactivation;
[0040] Step 4, hydration step: The methanation product is a high-temperature gas and needs to be cooled before the hydration step, because the hydration process needs to be close to the ambient temperature, and the methanation product is cooled by a surface cooler and comes out of the surface cooler The hot water can be recycled to achieve energy reuse, and then the FICFB method is used to synthesize SNG through a single-sta...
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