The methane content in the vent gas is extremely high; what methane conversion processes can be used?
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Our company plans to install new equipment, and we are currently conducting research. The gas components in the synthesis off-gas are as follows: H2 41.78%, CO 5.66%, CO2 3.15%, CH4 45.43%, N2 2.81%, Ar 0.89%. The volume of this gas is approximately 8–9 cubic meters. We need to determine what methane conversion process can be used to transform methane into useful gas components, what the main equipment required is, and what the investment costs will be. We seek advice from experts with relevant experience or from manufacturers who may be interested in this matter.
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What is the capacity? Did you mean 8-9 cubic feet per hour or per second? If the volume of gas is too small, it can be burned directly as fuel; there’s no need to proceed with extraction processes.
90,000 Nm3/h – that’s a pretty large volume; burning it directly would be rather wasteful
The gas flow rate is 80,000–90,000 Nm3/h; the unit ‘10,000’ was omitted in the given value
Where does the raw material gas come from before entering the synthesis process? Coal or gas? What is the volume of gas? What is the general production process like? What is the approximate pressure of the vent gas?
From another perspective, this process can utilize methanization to convert all the carbon oxides into methane, which can then be sold to relevant natural gas companies. The H2/(CO+CO2) ratio is 4.74; since methanization requires a higher hydrogen-to-carbon ratio, it is possible to supplement with some CO or CO2 as well
Do you synthesize methane or break down methane to produce methanol?
Methane conversion is possible, and the investment required is not high. Our company has carried out many such projects; for example, the 4 million tons per year coal-to-oil exhaust gas conversion project under construction involves breaking down methane into hydrogen, a useful gas, which is then sent to the subsequent processing stages. You can provide the gaseous components at the source along with the process flow, and we can prepare a proposal for your reference. You can contact me at 13918484903
This post was last edited by tianniu on 2015-7-7 09:00. Our factory is a company that produces methanol from natural gas, and we have currently shut down four natural gas-based methanol production units. A methane conversion unit or technology is needed; I can offer some guidance on this. Given the current conditions in the chemical industry and market demands, I believe it would be more economical to produce CNG or LNG. Methane conversion involves higher energy consumption and greater material losses, so using it as a fuel for vehicles is relatively more cost-effective. Moreover, after the conversion of your purge gas, the accumulation of nitrogen and argon remains, which is difficult to handle. Contact me if you want to exchange ideas
A cryogenic unit can be installed to directly liquefy methane to produce LNG; nowadays, LNG is available throughout the country, and the technology is well-established