Biogas is still underused resource which could boost our road to sustainability. It requires removal of impurities which either decrease its caloric value or could be harmful for the distribution and combustion systems. Greg’s new chapter is entirely sacrificed to the upcoming, electrochemical methods of biogas upgrading:

Electrochemical approach for biogas upgrading

…as a part of book: Emerging Technologies and Biological Systems for Biogas Upgrading edited by Nabin Aryal, Lars Ditlev Mørck Ottosen, Michael Vedel Wegener Kofoed and Deepak Pant