Study of the effect mechanism of municipal solid waste gasification conditions on the production of H and CO using modelling technique.

The municipal solid waste (MSW) gasification process was numerically studied in the work. The effect mechanisms of particle size, temperature and gasification atmosphere on the production of H and CO were investigated in detail. The results demonstrated that the total volume fraction of H and CO dropped from 51.7% to 49.7% with particle size increasing from 20 < d < 30 mm to 80 < d < 100 mm under steam atmosphere. With the temperature increasing from 600 °C to 1000 °C, the total volume fraction of H and CO was raised from 56.1% to 65.8% under steam atmosphere. Five different gasifying agents: 100%CO, 21%O/79%N, 21%O/79%HO, 21%CO/79%HO, 21%O/79%CO were simulated, and the total volume fraction of H and CO was 51.87%, 19.1%, 56.13%, 48.36% and 42.98%, respectively. In the gasification conditions considered in this work, H + HO⇔OH + H (R84) played a key role in the yield of H, and the yield of CO was significantly affected by H + CO⇔OH + CO (R99) and H + CHCO⇔CH+CO (R81).