Journal
FUEL
Volume 305, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2021.121447
Keywords
Biomass to hydrogen; Sorption-enhance steam reforming; Ni; perovskite catalyst
Categories
Funding
- National Natural Science Foundation of China [52076020]
- Fundamental Research Funds for the Central Universities [2020CDJQY-A050]
- Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering [2021-K12]
- Venture and Innovation Support Program for Chongqing Overseas Returnees [cx2017021]
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The study investigated the sorption enhanced steam reforming (SESR) of toluene using a Ni/perovskite catalyst and CaO sorbent, achieving high hydrogen purity at an appropriate temperature. Regeneration and characterization of the catalyst showed stable performance and compatibility in the SESR process for high-purity hydrogen production.
It is known that a considerable amount of tar is usually generated in the biomass gasification process, and catalytic steam reforming is an effective method to remove this by-product. The coupling of in-situ CO2 capture in the process can further shift the forward reforming reaction and produce hydrogen with a high purity. In this work, sorption enhanced steam reforming (SESR) of toluene (as a model compound of biomass tar) was investigated thermodynamically and experimentally using the mechanically mixed Ni/perovskite catalyst and CaO sorbent. It is verified that the appropriate temperature is 650 degrees C under stoichiometric reaction (S/C = 2), and around 75% average H2 yield with a maximum H2 purity over 95% could be obtained. Moreover, the cyclic SESRregeneration and characterization including XRD, SEM/EDS, TEM and XPS were carried out, and it shows a stable catalytic performance and compatibility of the Ni/perovskite catalyst in the SESR process for high-purity hydrogen production.
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