| Title |
Engineering biochar-supported nickel catalysts for efficient CO2 methanation |
| ID_Doc |
12231 |
| Authors |
Frainetti, AJ; Klinghoffer, NB |
| Title |
Engineering biochar-supported nickel catalysts for efficient CO2 methanation |
| Year |
2024 |
| Published |
|
| DOI |
10.1016/j.biombioe.2024.107179 |
| Abstract |
Carbon dioxide methanation is a promising approach to convert captured CO2 into green natural gas. Developing high performance biochar-supported nickel catalysts promotes a circular economy and the application of sustainable catalysts. Western red cedar biochar was produced via pyrolysis at 400, 500, and 600 degrees C and loaded with nickel via incipient wetness impregnation. Methanation was done at 400, 500, and 600 degrees C with the highest methane yield of 59% achieved at 500 degrees C with 10 wt.% Ni loading. This is comparable to a gamma-Al2O3 supported catalyst prepared and tested similarly, which achieved a methane yield of 53%. Biochar-supported catalysts showed deactivation whereby methane yield decreased from 59% to 51% over 5 h, likely due to coking and/or the sintering of nickel. Various space velocities were tested, and results demonstrated that with a space velocity of 37.5 mL/g.min methane selectivity was 89% after 1 h on stream compared to methane selectivity of 42%, which was achieved at a space velocity of 112.5 mL/g.min. This shows that a much higher rate of deactivation is observed at higher space velocities. Increasing the nickel loading from 5 wt.% to 10 wt.% increased methane yield from 40% to 58% after 1 h on stream. The higher loading also showed significantly less deactivation. Future work focusing on the extent and impact of metal -support interactions and metal dispersion on catalytic performance and deactivation during CO2 methanation is recommended. |
| Author Keywords |
Methanation; Biochar; CO2 utilization; Catalysis; Pyrolysis; Nickel catalyst |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001218287700001 |
| WoS Category |
Agricultural Engineering; Biotechnology & Applied Microbiology; Energy & Fuels |
| Research Area |
Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels |
| PDF |
https://doi.org/10.1016/j.biombioe.2024.107179
|