Title Biodujų gerinimo procesų, naudojant membranines technologijas, tyrimas /
Translation of Title Investigation of biogas upgrading processes, using membrane technologies.
Authors Šereika, Justas
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Pages 69
Keywords [eng] polymeric ; membranes ; permeability ; selectivity ; biogas
Abstract [eng] Biogas is a renewable energy source which has a perspective to be used in high technology energetic systems instead of natural gas. Raw biogas contains high proportion of components which are useless in combustion such as carbon dioxide. As a replacement of natural gas, biogas should meet natural gas quality requirements, which can be assured with biogas upgrading technologies. In order to upgrade biogas, gases that are useless for combustion should be separated from methane. Carbon dioxide and methane are the main components of biogas. The proportion of these components can vary from 50/50% to 70/30% (CH4/CO2) thus in order to effectively combust biogas, the carbon dioxide should be separated from methane. This process can be ensured with membrane technologies. In my master’s degree final project, a membrane which was made from polyphenylsulfone polymer was used as a main investigation object. This membrane is property of Lithuanian energy institute’s Laboratory of Heat Equipment Research and Testing. Experiments with this membrane were done while using binary carbon dioxide and methane gas mixtures. The purpose of this investigation was to measure polymeric membrane’s ability to separate carbon dioxide from methane. Based on the theoretical points expressed in this work, there were also calculations made during the experiments to determine the dependency of volume flow, mass flow, permeability and concentration difference on pressure difference in membrane block.. Pressure difference in membrane block is calculated by measuring the inlet and outlet pressure of the membrane block. Obtained dependencies can be used in further investigation while designing a multistep biogas upgrading device or mathematically modelling biogas upgrading process.
Dissertation Institution Kauno technologijos universitetas.
Type Master thesis
Language Lithuanian
Publication date 2020