Biogas Purifying Technology In Large And Medium Scale Biogas-Projects

With the development of regenerating energy exploring, the constructing and retaining of large and medium scale biogas-projects have been boosted, thus requiring a higher quality demand of biogas. However, the purifying technology presently used in large projects, which originated from that used in small scale biogas-pond in the countryside, fails to meet the new requirement. Therefore, it is especially important to further studies on the biogas purifying technology. This thesis focuses on the mechanism and techniques of purifying in large and medium scale biogas-projects. And the research has been furthered after considerable data and similar studies were referred to. Based on biogas's ingredients and its practical uses as fuel, three aspects covering hydrogen sulphide removal from biogas for the purpose of reuse, dehydration and carbon dioxide removal from biogas for the purpose of reuse are systematically stated to look into the related techniques and indispensable equipments, hydrogen sulphide removal from biogas for the purpose of reuse in biogas distinguished from that in smoke is particularly analyzed. Starting with the mechanism of chemical methods of purifying, this research offers several bolder attempts in hydrogen sulphide removal from biogas for the purpose of reuse . And by qualitative analysis, a novel method is put forward combining the absorption of iron-oxide with the electrochemistry regeneration salvation. Four proper methods are also listed for attempts of carbon dioxide removal from biogas for the purpose of reuse in biogas purifying.