Microalgae gasification over Ni loaded perovskites for enhanced biohydrogen generation

Valizadeh S 1 , Khani Y 1 , Farooq A 1 , Kumar G 2 , Show PL 3 , Chen WH 4 Show all authors , Lee SH 5 , Park YK 6

Affiliations 

  • 1 School of Environmental Engineering, University of Seoul, Republic of Korea
  • 2 School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea
  • 3 Department of Chemical Engineering, Khalifa University, Shakhbout Bin Sultan St, Zone 1, Abu Dhabi, United Arab Emirates; Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou 325035, China; Department of Sustainable Engineering, Saveetha School of Engineering, SIMATS, Chennai 602105, India; Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
  • 4 Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan; Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 411, Taiwan
  • 5 Department of Mineral Resources and Energy Engineering, Jeonbuk National University, 54896 Jeonju, Republic of Korea; Department of Environment and Energy, Jeonbuk National University, 567 Jeonju, Republic of Korea
  • 6 School of Environmental Engineering, University of Seoul, Republic of Korea. Electronic address: catalica@uos.ac.kr
Bioresour Technol, 2023 Jan 18;372:128638.
PMID: 36669624 DOI: 10.1016/j.biortech.2023.128638

Abstract

Steam gasification of microalgae upon perovskite oxide-supported nickel (Ni) catalysts was carried out for H2-rich gas production. Ni-perovskite oxide catalysts with partial substitution of B in perovskite structures (Ni/CaZrO3, Ni/Ca(Zr0.8Ti0.2)O3, and Ni/Ca(Zr0.6Ti0.4)O3) were synthesized and compared with those of the Ni/Al2O3 catalyst. The perovskite oxide supports improved Ni dispersion by reducing the particle size and strengthening the Ni-support interaction. Higher gas yields and H2 selectivity were obtained using Ni-perovskite oxide catalysts rather than Ni/Al2O3. In particular, Ni/Ca(Zr0.8Ti0.2)O3 showed the highest activity and selectivity for H2 production because of the synergetic effect of metallic Ni and elements present in the perovskite structures caused by high catalytic activity coupled with enhanced oxygen mobility. Moreover, increasing the temperature promoted the yield of gas and H2 content. Overall, considering the outstanding advantages of perovskite oxides as supports for Ni catalysts is a promising prospect for H2 production via gasification technology.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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