Host: Japan Society of Material Cycles and Waste Management
Name : The 30th Annual Conference of Japan Society of Material Cycles and Waste Management
Number : 30
Location : [in Japanese]
Date : September 19, 2019 - September 21, 2019
In meeting the rising global energy demands, research on alternative fuels such as waste cooking oil (WCO) had grown interest. Its known treatment method is conversion to second-generation biodiesel through transesterification and hydrodeoxygenation. However, these processes have disadvantages resulting to low biodiesel production. Supercritical water gasification (SCWG) process transforms biomass with high water content into H2-rich gaseous products. Therefore, SCWG is an attractive option in achieving WCO treatment and bioenergy conversion simultaneously. Thus, this research aims to study the applicability of SCWG in WCO treatment. Vegetable oil was used as a representative compound for WCO. Experiments were conducted by gasifying vegetable oil using nickel catalysts in lab-scale flow type reactor. Experimental conditions employed were fixed at 400 °C and 25 MPa at variable feed concentration (2 – 5 wt%). From the study, SCWG had shown promising results in converting oil into desired gaseous products such as H2 and CH4. It was found out that at lower biomass concentration, higher gas yields and efficiencies can be attained. However, as reaction progressed, the decline of catalyst performance was observed. Therefore, through system optimization and improving the catalyst life, SCWG is a viable technology in gasifying and converting WCO into desirable gaseous products.
