Influence of NiO into the CO 2 capture of Li 4 SiO 4 and its catalytic performance on dry reforming of methane

Carbon capture, utilization, and storage (CCUS) technology offer promising solution to mitigate the threatening consequences of large-scale anthropogenic greenhouse gas emissions. Within this context, this report investigates the influence of NiO deposition on the Li SiO surface during the CO capture process and its catalytic behavior in hydrogen production via dry methane reforming. Results demonstrate that the NiO impregnation method modifies microstructural features of Li SiO , which positively impact the CO capture properties of the material. In particular, the NiO-Li SiO sample captured twice as much CO as the pristine Li SiO material, 6.8 and 3.4 mmol of CO per gram of ceramic at 675 and 650 °C, respectively. Additionally, the catalytic results reveal that NiO-Li SiO yields a substantial hydrogen production (up to 55 %) when tested in the dry methane reforming reaction. Importantly, this conversion remains stable after 2.5 h of reaction and is selective for hydrogen production. This study highlights the potential of Li SiO both a support and a captor for a sorption-enhanced dry reforming of methane. To the best of our knowledge, this is the first report showcasing the effectiveness of Li SiO as an active support for Ni-based catalysis in the dry reforming of methane. These findings provide valuable insights into the development of this composite as a dual-functional material for carbon dioxide capture and conversion.