(2022) Bioresource Technology_Catalytic pyrolysis for upgrading silver grass (Miscanthus sinensis) and carbon dioxide into flammable gases

Lee S., Jung S., Kwon E.E.

(Elsevier Ltd) Bioresource Technology ISSN: 9608524 Vol.365 Issue. Article No.128153 DOI: 10.1016/j.biortech.2022.128153

This study proposes a sustainable hydrogen production platform using a fast-growing and inedible biomass waste, silver grass (Miscanthus sinensis). Pyrolysis of silver grass waste (SGW) was investigated using CO₂ as a co-feedstock, focusing on the distribution of hydrogen in different products. When the catalyst was absent, hydrogen element distribution to H₂ gas during pyrolysis of SGW at 800 °C reached 10 wt%. During pyrolysis with the Ni/SiO₂ catalyst, 60.3 wt% of hydrogen was converted into H₂ gas, and 7.3 wt% of hydrogen was distributed in gaseous hydrocarbons at 600 °C. Owing to the addition of CO₂, CO production was promoted by the catalytic conversion of CO₂ and volatile matter. Notably, CO₂ has been proven to be a useful reactant for producing value-added CO. Thus, catalytic pyrolysis in the presence of CO₂ can be considered as a renewable approach to produce flammable gases with the mitigation of CO₂ emissions. © 2022

This work was supported by the Research Fund of Hanyang University ( HY-202200000001130 ).