Hydrogen production from sorption-enhanced steam gasification of municipal solid waste using Ni-Ca-Al bi-functional catalysts.

Sorption-enhanced steam gasification (SESG) has the potential to increase hydrogen (H 2) yield and facilitate the utilization of municipal solid waste (MSW) resource. However, the application of SESG technology in MSW still has broad research space. Therefore, this study innovatively used simulated MSW for gasification experiments. The bi-functional catalysts were prepared by co-precipitation method. In the CO 2 cyclic adsorption test, Ni0.1CA3 exhibited the highest total adsorption capacity, with 75% of the initial adsorption capacity still preserved. In the SESG test, Ni0.1CA3 showed excellent catalytic performance and the H 2 yield reached 31.69 mmol/g MSW. In addition, Ni0.1CA3 also demonstrated good stability and low carbon deposition in the SESG cycles. This could be attributed to the synergistic effect of the well-structured surface, appropriate basic sites, and calcium aluminate skeleton in Ni0.1CA3. This study served as a reference for the production of high-purity H 2 through the gasification of MSW, aligning with the development direction of green finance policy. [Display omitted] • MSW gasification realized the resource utilization of solid waste. • Ni0.1CA3 retained 75% of initial capacity after 10 CO 2 adsorption cycles. • Ni0.1CA3 showed superior hydrogen production potential in SESG of MSW. • The highest H 2 gas concentration reached 80.76 vol%. • The highest H 2 yield reached 31.69 mmol/g MSW. [ABSTRACT FROM AUTHOR]