Enhanced H2 Production from Municipal Solid Waste Gasification Using Ni-CaO-TiO2 Bi-Functional Catalyst Prepared by DC Arc Plasma Melting

The gasification of Municipal solid waste (MSW) in the presence of a Ni-CaO catalyst is a promising approach for in-situ CO2 capture along with the enhanced H2 syngas production. However, the instability of the catalyst-sorbent matrix is a challenging obstacle for the gasification process. Direct current (DC) arc plasma melting method was employed to prepare a series of bi-functional catalyst (Ni-CaO) with varied Ni-loadings, while TiO2 as polymorphic transition material was added to promote the stability of catalyst. The catalyst samples were evaluated for cyclic CO2 capture and catalytic gasification of MSW using thermogravimetric analysis (TGA) and fixed-bed reactor, respectively. The obtained results showed that the addition of TiO2 into Ni-CaO catalyst-sorbent led to improvements in the stability of catalyst for CO2 capture. The gasification performance of a bi-functional Ni-CaO-TiO2 catalyst was evaluated on the basis of Ni-loading, the catalyst to MSW (C/M) ratio, temperature, and steam rate. The r...