RESEARCH OF METHANE PRODUCTION PROCESS FROM BIOGAS AND PYROLYSIS GAS
The article investigates the separation process of biogas and the pyrolysis gas by application of membrane technology. The urgency of the problem of purification of industrial, agricultural, distillery waste or waste water by means of biological fermentation in anaerobic conditions of organic substances is indicated. If it is not possible to biodegrade waste, use pyrolysis or gasification. Pyrolysis gas, unlike biogas, has hydrogen and carbon monoxide. The process of separating methane from leaving impurities is much more economical than the process of removing impurities to obtain methane.
Although for more than a hundred years mankind has known about the principles of gas diffusion and mass transfer through polymer films. But only in the last 40 years, membranes have begun to be used on an industrial scale in gas purification. With a membrane unit, a high methane production efficiency (> 96%) can be achieved. The lack of mechanical complexity and their modular design, which allows them to scale easily to provide significant flexibility, are increasingly gaining attention from the industry.
The paper was proposed setting circuit for isolating methane and its operation is described.
As a result of the research carried out, graphical dependencies were obtained at the stages: absorption (volume fraction of dissolved methane from the circulation ratio of the absorber), adsorption (absorption capacity of the membrane packing over time) and regeneration (the rate of desorption of the absorber from the membrane packing versus time). Using these dependencies, it is possible to calculate the flow rate of the absorber that is used in the absorption process and to determine the number of membrane elements for the membrane apparatus.
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