Process for production of methane rich gas
A technology rich in methane and gas, applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problem that the theoretical optimal value cannot be verified and the cost is reasonable, and achieve the effect of a cheap and simple heat exchanger structure
Inactive Publication Date: 2014-02-12
HALDOR TOPSOE AS
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[0011] Similarly, performing this process in multiple reactors involves additional capital costs, and the increased SNG yield values, especially in final methanation, may not justify operation near the theoretical optimum of the methanation reaction activation temperature. Reasonable cost for multiple small reactors
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[0056] according to figure 1 The methods and process equipment are exemplary embodiments of the present disclosure, illustrating principles of operation. However, the exact structure, especially the specific temperature and other process parameters described below, should not be construed as limiting the invention. Syngas 30, comprising carbon oxides and hydrogen, is directed to one or more reactors in the main methanation stage, here represented by boiling water reactor (BWR) 4, where the gas contacts a methanation catalyst on a suitable support. An active material, such as nickel or ruthenium, provides a first product gas 32 . The maximum reaction temperature in bulk methanation can be controlled to about 600°C by steam addition, recirculation, and other methods well known to those skilled in the art. After bulk methanation, the level of carbon oxides in the first product gas 32 is generally less than 5%. Water with minor impurities is removed by condensation in condenser...
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The invention relates to process for production of methane rich gas and related technical equipment employing the method. The method comprises the steps of guiding syngas to a main methanation stage including one or more reactors, extracting first result gas from a first methanation stage, cooling the first result gas, extracting liquid condensate and intermediate feeding gas, heating intermediate feeding gas, allowing the intermediate feeding gas to react in a final methanation reactor with the presence of methanation catalytic active material to form final methane rich gas, extracting heat from the final methanation reactor through a cooling medium in heat transferable contact with the methanation catalytic active material or gas in the final methanation reactor. The method has the effect of remaining low reaction temperature in at least partial final methanation stage, thereby chemical equilibrium shifting to methane and obtaining high methane conversion rate.
Description
technical field [0001] The present invention relates to a process for the production of methane-enriched gas from a synthesis gas rich in carbon oxides and hydrogen, wherein the final methanation is carried out in a cooled reactor to ensure a low reaction temperature so that the chemical equilibrium shifts from the reactants to one comprising methane product. Background technique [0002] Known utilization will contain carbon oxides (CO and CO 2 ) and hydrogen through a methanation stage comprising one or more methanation reactors, each containing a fixed bed of Gasification preparation of materials. [0003] In such methanation processes, methane formation from carbon oxides and hydrogen proceeds rapidly to equilibrium in the presence of a catalyst if the inlet temperature is sufficient to activate the reaction. Accordingly, the reactions will proceed according to one or both of the following reaction schemes: [0004] CO+3H 2 <=> CH 4 +H 2 O (1) [0005] CO ...
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IPC IPC(8): C10L3/08
Inventor C.威斯
Owner HALDOR TOPSOE AS