%0 Journal Article %T The effect of chemical activation of biochar on biogas purification %A Pertiwiningrum, A %A Rhema, T %A Wuri, M A %A Fitriyanto, N A %A Tontowi, A E %J IOP Conference Series Earth and Environmental Science %V 1108 %N 1 %P 4 %@ 1755-1307 %D 2022-11-01 %I IOP Publishing %~ DeepDyve