Acetic acid removal from bio-oil on alumina-supported CaO and/or Ag catalysts

MARISA BELÉN NAVAS; MÓNICA LAURA CASELLA; MAIA MONTAÑA; GUILLERMO J. SIRI; HERNÁN P. BIDEBERRIPE; ILEANA DANIELA LICK

Florencia

Congreso; 13th European Congress on Catalysis; 2017

Sociedad Italiana de Catálisis

Acetic acid removal from bio-oil by catalytic process was investigated over alumina supported calcium oxide and silver catalysts. A 20 wt% CaO supported on gamma-alumina system (CaO-Al) was prepared by precipitation of CaCO3 followed by calcination to obtain the supported oxide. A 10wt% Ag catalyst was prepared by impregnation on CaO-Al as support (Ag/CaO-Al). The conversion of acetic acid was tested in batch micro-reactors, with the purpose of screening the reaction condictions. Both CaO-Al an Ag/CaO-Al were active for the reaction, with the contribution of the metal phase increasing the conversion with respect to CaO-Al (75.7% vs. 58% al 200ºC). The Ag/CaO-Al catalyst was also tested in a batch reactor at two pressures, achieving a conversion of acetic acid of 97.5% at the lowest pressure (280 kPa). Based on the results, it is postulated that multiple pathways (catalytic decarboxylation, neutralization and ketonization) are responsible for acetic acid conversion