Volume 66

Preparation of Ni-Co/Al2O3 Catalyst by Redox Method for Hydrogen Production by Sewage Sludge Pyrolysis Volatiles Steam Reforming Mingxuan Ji, Yuheng Feng

Abstract

Ni-Co/Al2O3 bimetallic catalysts efficiently treat sewage sludge and produce valuable hydrogen-rich syngas through the pyrolysis-catalytic steam reforming. This study investigates a novel redox preparation method to enhance interactions at the nickel-cobalt active site. For the experimental work, sewage sludge pyrolysis volatiles were steam-reformed at 650 °C over bare alumina and catalysts prepared by redox, precipitation, and impregnation methods. The preparation conditions for all catalysts were identical. The resulting gas and liquid products were then analyzed using GC and GC×GC-TOFMS. The catalyst prepared using the redox method performed best. After reforming with this catalyst, the experimental results show that 9.09 mmol/g of gas and 4.24 mmol/g of H2 were produced. The main liquid product of this catalyst is chain hydrocarbons, which is more than 62.6%.

Keywords Sewage Sludge; Pyrolysis; Steam Reforming; Hydrogen Production; Ni-Co/Al2O3 Catalyst; Redox Method