{"id":377955,"date":"2022-06-01T12:00:00","date_gmt":"2022-06-01T10:00:00","guid":{"rendered":"https:\/\/innovationorigins.com\/?post_type=selected&p=377955"},"modified":"2022-06-01T12:00:00","modified_gmt":"2022-06-01T10:00:00","slug":"increasing-methane-yield-from-biogas-plants-through-a-new-process","status":"publish","type":"selected","link":"https:\/\/ioplus.nl\/archive\/en\/selected\/increasing-methane-yield-from-biogas-plants-through-a-new-process\/","title":{"rendered":"Increasing methane yield from biogas plants through a new process"},"content":{"rendered":"\n

Germany is on the road to climate neutrality and is aiming to reduce carbon dioxide emissions by 65 percent by 2030 compared to the 1990 levels. Biogas plants play an important role in defossilization: Bacteria in these plants break down biomass in the absence of oxygen to form biogas which, on average, comprises up to 60 percent methane and more than 40 percent CO2<\/sub>. While the biogas is used to generate electricity and heat in combined heat and power units or can be upgraded to natural gas quality and fed into the natural gas network, the CO2<\/sub> has not been utilised to date, writes the Fraunhofer Institute in a press release<\/a>.<\/p>\n\n\n\n

Ensuring full use of biogas<\/strong><\/h3>\n\n\n\n

Researchers from Fraunhofer IMM are now working at technology to utilise the CO2<\/sub>. \u201cWe are converting the CO2<\/sub> into methane using green hydrogen,\u201d says Dr. Christian Bidart, one of the scientists at Fraunhofer IMM, explaining the principle behind the new process. This means that the biogas produced can be used to its full extent now and not only to around 60 percent, as in the past. The underlying chemical reaction has been discovered more than hundred years ago, but to date it has not been used for direct upgrading of biogas. In the scope of the energy transition process, however, pathways for the utilisation of CO2<\/sub> are getting into focus.<\/p>\n\n\n

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Restoration of Irish peatlands should lead to sharp reductions in emissions<\/div>
The central area of Ireland is known for its vast stretches of peat bogs. They are home to an extraordinary assortment of flora and fauna, but also serve another very important purpose. As it turns out, globally, these are enormous carbon sinks.<\/div><\/div><\/div>\n\n\n

In the ICOCAD I project, the research team developed a demonstration plant which converts one cubic meter of biogas per hour into one cubic meter of methane with a thermal power equivalent of ten kilowatts of the electrolyser required to produce the hydrogen for the process. In the follow-up project ICOCAD II, the researchers are now in the process of scaling up this demonstrator by a factor of five \u2013 to a thermal output of 50 kilowatts. One of the challenges in this project is the highly dynamic nature of the process. The amount of electricity generated by wind and photovoltaic systems fluctuates significantly \u2013 which means that the amount of green hydrogen obtained from water using electricity in electrolyzers is also subject to considerable fluctuations. The demonstration plant therefore needs to be able to respond quickly to varying quantities of hydrogen. Storing hydrogen would technically be possible but would be complicated and expensive. \u201cWe are therefore working on making the entire system flexible in order to avoid hydrogen storage to the largest possible extent,\u201d says Bidart. CO2<\/sub> storage tanks are part of this plan, because the quantity of CO2<\/sub> produced in the biogas plants remains constant.<\/p>\n\n\n\n

Developing efficient catalysts<\/strong><\/h3>\n\n\n\n

Developing efficient catalysts for the reaction was another challenge. The solution that the Fraunhofer IMM researchers came up with was to use a microcoating made from precious metals. The principle behind it is that hydrogen and carbon dioxide flow through a large number of microchannels \u2013 which have walls coated with the catalyst \u2013 where they react with each other. \u201cIn this way, we can increase the contact surface between the gases and the catalyst material and reduce the amount of catalyst required,\u201d says Bidart. Numerous microstructures of this kind are stacked on top of each other in the reactor.<\/p>\n\n\n\n

Plans for further upscaling<\/strong><\/h3>\n\n\n\n

The researchers are currently working on implementing the larger demonstrator and realizing dynamic operation. They hope to be able to put this plant into operation in 2023 so they can test it under real conditions at a biogas plant. However, this is by no means the limit of their upscaling plans \u2013 given the large volumes of CO2<\/sub> produced by the biogas plants. The researchers therefore have further plans to scale up to 500 kilowatts by 2025 and again to one to two megawatts by 2026.<\/p>\n","protected":false},"author":2084,"featured_media":516244,"template":"","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":""},"categories":[42],"tags":[40547,80866,38175,34139,40184],"location":[24456],"internal_archives":[],"class_list":["post-377955","selected","type-selected","status-publish","has-post-thumbnail","hentry","category-sustainability-nl","tag-biogas","tag-carbon-neutrality","tag-co2-emissions","tag-fraunhofer-institute","tag-methane","location-germany"],"blocksy_meta":[],"acf":[],"featured_img":"https:\/\/ioplus.nl\/archive\/wp-content\/uploads\/2022\/05\/peat-bales-260014_1920.jpg","coauthors":[],"author_meta":{"author_link":"https:\/\/ioplus.nl\/archive\/author\/mauro-mereu\/","display_name":"Mauro Mereu"},"relative_dates":{"created":"Posted 4 years ago","modified":"Updated 4 years ago"},"absolute_dates":{"created":"Posted on June 1, 2022","modified":"Updated on June 1, 2022"},"absolute_dates_time":{"created":"Posted on June 1, 2022 12:00 pm","modified":"Updated on June 1, 2022 12:00 pm"},"featured_img_caption":"","tax_additional":{"category":{"linked":["Sustainability<\/a>"],"unlinked":["Sustainability<\/span>"],"slug":"category","name":"Categories"},"post_tag":{"linked":["biogas<\/a>","carbon neutrality<\/a>","CO2 emissions<\/a>","Fraunhofer Institute<\/a>","methane<\/a>"],"unlinked":["biogas<\/span>","carbon neutrality<\/span>","CO2 emissions<\/span>","Fraunhofer Institute<\/span>","methane<\/span>"],"slug":"post_tag","name":"Tags"},"language":{"linked":["EN<\/a>"],"unlinked":["EN<\/span>"],"slug":"language","name":"Tags"},"post_translations":{"linked":["pll_6297343a21f17<\/a>"],"unlinked":["pll_6297343a21f17<\/span>"],"slug":"post_translations","name":""},"location":{"linked":["Germany<\/a>"],"unlinked":["Germany<\/span>"],"slug":"location","name":"Locations"},"internal_archives":{"linked":[],"unlinked":[],"slug":"internal_archives","name":"Internal Archives"}},"series_order":"","_links":{"self":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/selected\/377955","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/selected"}],"about":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/types\/selected"}],"author":[{"embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/users\/2084"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/media\/516244"}],"wp:attachment":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/media?parent=377955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/categories?post=377955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/tags?post=377955"},{"taxonomy":"location","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/location?post=377955"},{"taxonomy":"internal_archives","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/internal_archives?post=377955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}