Postgraduate Seminar Presentation : Experimental and Numerical Investigation on Utilization of Biomass Wastes in an Integrated Bio-and-Thermal Hybrid System

Speaker Kan Siang (Supervisor(s): Prof Wang Chi-Hwa and A/Prof Yang Wenming (ME))

Host Department of Chemical and Biomolecular Engineering

Date/Time 16 Jul - 16 Jul, 2.00pm

Venue E5-02-32 , Faculty of Engineering, National University of Singapore

Synopsis

Syngas and biogas are two typical biofuels generated from biomass wastes through gasification and anaerobic digestion processes, considered to be the future fuels for IC engines. In this work, the utilization of biogas and syngas produced from horticultural waste in a premixed spark ignition engine was investigated. An experimentally validated KIVA4-based CFD simulation integrated with CHEMKIN was performed to evaluate engine performance fuelled by syngas and biogas under both single and blended-fuel modes. To make the system more sustainable, CO2 co-gasification of horticultural waste and sewage sludge with addition of ash from waste as catalyst was comprehensively investigated using Box-Behnken experiment design in a fixed-bed lab-scale gasifier under varying operating parameters, i.e. loaded ash content, operating temperature, and gasification agent flow rate, followed by the study of the produced syngas combustion using above-mentioned CFD model.

Biography