solution. The absorption solution was then detected using ion
chromatography (883 Basic IC plus, Metrohm). The H2S content in
producer gas was measured by the methylene blue method using
an ultravioletevisible spectroscopy (UV/VIS) spectrophotometer
(UVmini-1240, SHIMADZU). In addition, the surface area of the
activated carbon was measured using a BrunauereEmmetteTeller
(BET) surface area analyzer. Proximate analysis of the feed material
was conducted according to the ASTM D3172