Catalytic reactive flash volatilisation of microalgae to produce hydrogen or methane-rich syngas

Pratik Gholkar, Yogendra Shastri, Akshat Tanksale

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

Catalytic reactive flash volatilization (RFV) is a single-step char- and tar-free alternative to the gasification process at low temperatures (600–650 °C). In this work catalytic RFV of microalgae Scenedesmus sp. was performed using steam as a gasifying agent. Effect of temperature and steam content on the gasification efficiency and syngas composition was studied in presence of Ni-Rh/γ-Al 2 O 3 catalyst which showed that at 650 °C and carbon-to-steam ratio of 0.12, H 2 rich (65% (v/v)) syngas was generated, whereas, in presence of Ni-Cu-Pd/γ-Al 2 O 3 catalyst at 600 °C and carbon-to-steam ratio of 0.12, CH 4 rich (16% (v/v)) syngas was generated. Gasification efficiency of 83% and 93%, respectively, was achieved without tar formation. Furthermore, the molar ratio of H 2 -to-CO in case of H 2 -rich syngas was 10.9. The alkali and alkaline earth metals present in the microalgae act as a catalyst in the reaction which lead to stable catalytic performance.

Original languageEnglish
Pages (from-to)326-334
Number of pages9
JournalApplied Catalysis B: Environmental
Volume251
DOIs
Publication statusPublished - 15 Aug 2019

Keywords

  • Hydrogen
  • Methane
  • Microalgae
  • Reactive flash volatilization

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