BIOGAS UPGRADING APPARATUS AND PROCESS

A biogas upgrading system can include a multiple stage membrane system that is configured to remove oxygen so that the biogas is upgraded to have a higher concentration of methane, a pre-selected oxygen (02) concentration (e.g. less than or equal to 0.2 mol%, etc.), and a pre-selected carbon dioxide...

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Bibliographic Details
Main Author HENRY, DONALD E
Format Patent
LanguageEnglish
French
Published 12.04.2023
Subjects
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:A biogas upgrading system can include a multiple stage membrane system that is configured to remove oxygen so that the biogas is upgraded to have a higher concentration of methane, a pre-selected oxygen (02) concentration (e.g. less than or equal to 0.2 mol%, etc.), and a pre-selected carbon dioxide (CO2) concentration (e.g. less than or equal to 5 mol%, etc.). The membrane system can be configured to reject 02 by utilizing a low CO2/02 selectivity that is within a pre-determined range (e.g. less than 5 or less than 4.5). In some embodiments, the upgraded biogas that is output from the system can be entirely made up of methane, carbon dioxide, and oxygen. In other embodiments, the biogas can be almost entirely composed of these components along with a small amount of nitrogen and a trace amount (e.g. less than or equal to 0.2%-0.1%, etc.) of other components.
Bibliography:Application Number: CA20223177579