Study on Methanation Performance of Biomass Gasification Syngas Based on a Ni/Al2 O3 Monolithic Catalyst

ACS Omega
Wanli XingTianhua Yang

Abstract

The structure of a Ni/Al2O3 monolithic catalyst after methanation reaction and its methanation performance were studied by taking analogue syngas of biomass gasification H2/CO/N2 as feed gas when the temperature ranged from 250 to 550 °C, and the weight hourly space velocity (WHSV) was between 6000 and 14,000 mL g-1 h-1. The Ni/Al2O3 catalysts using cordierite honeycomb ceramics as the substrate were prepared by dipping and sol-gel methods. The results show that the Ni/Al2O3 catalyst prepared by the dipping method (DIP-Ni/Al2O3) has better methanation performance than the Ni/Al2O3 catalyst prepared by the sol-gel method (SG-Ni/Al2O3) through many tests such as TEM, BET, XRD, H2-TPD, H2-TPR, and TG analysis. The DIP-Ni/Al2O3 catalyst exhibits the best methanation performance at 400 °C when the molar ratio of H2, CO, and N2 is 3/1/1 and the WHSV is 10,000 mL g-1 h-1. Under this condition, the CO conversion and CH4 selectivity are 98.6 and 90.9%, respectively. In addition, the methanation performance of the DIP-Ni/Al2O3 catalyst is relatively more stable, and the CO conversion and CH4 selectivity were basically maintained at around 90% within the experimental WHSV range. The influence of Ni content on the methanation performance o...Continue Reading

References

Jan 7, 2018·The Science of the Total Environment·Xiaoliu WangShurong Wang
May 2, 2019·Journal of Nanoscience and Nanotechnology·Nela AmbrožováMarta Valášková

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