Degradation of biomass tar catalyzed by Fe/Ce supported on diatomite-based foam ceramics

Foam ceramics with excellent pore structure were prepared by using mineral diatomite with abundant reserves. It is used for catalytic reforming of biomass pyrolysis gas. Fe2O3 and CeCl3 were loaded on foam ceramics as active materials to explore the effect of using them as catalyst supports. The experimental results show that diatomite-based foam ceramics (DBFC) have good catalytic performance. At 750 celcius, the gas yield was increased by 6.5% and the liquid yield was reduced by 16.04% under the catalysis of diatomite-based foam ceramics. After repeated use tests, the results show that the anti-deactivation activity is higher, and the catalytic effect of the second use is better than that of the third use, but still better than that of the first use. When DBFC is used as catalyst carrier, Fe2O3 loaded on it has better catalytic performance. At 750 celcius, the gas yield increased by 13.14% and the liquid yield decreased by 33.54%. The analysis of gas phase products shows that the use of DBFC will increase H-2, CH4, and CO2 in the syngas, but will reduce the yield of CO, and the increase of CO2 yield is greater than that of H-2 and CH4. Fe2O3 loading leads to the highest gas productivity, but the proportion of CO2 in syngas is also the highest and LHV is the lowest.

Automated summary

Foam ceramics prepared from diatomite showed excellent catalytic performance as catalyst carriers for biomass pyrolysis gas reforming. Loading Fe2O3 on the foam ceramics enhanced catalytic performance, increasing gas yield by 13.14% and reducing liquid yield by 33.54% at 750 degrees Celsius. The repeated use tests demonstrated higher anti-deactivation activity and improved catalytic effect in the second use compared to the third use. The analysis of gas phase products revealed increased H-2, CH4, and CO2 yields with the use of diatomite-based foam ceramics, while CO yield decreased.