CO2 Hydrogenation to Light Olefins Over In2O3/SAPO-34 and Fe-Co/K-Al2O3 Composite Catalyst

Thanapha Numpilai, Supitchaya Kahadit, Thongthai Witoon, Bamidele Victor Ayodele, Chin Kui Cheng, Nuchanart Siri-Nguan, Thana Sornchamni, Chularat Wattanakit, Metta Chareonpanich, Jumras Limtrakul

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Direct CO2 conversion to light olefins offers a chance to reduce CO2 emission with generating the revenue. However, a lack of efficient catalysts is a barrier for promoting this technology to an industrial scale. Here, we report a new catalytic system using a composite catalyst containing In2O3/SAPO-34 and Fe-Co/K-Al2O3 to enhance the light olefins yield. The effect of catalysts bed configuration including a physical mixture of In2O3/SAPO-34 with Fe-Co/K-Al2O3 (M-InS/Fe-Co), a dual-layer packing of In2O3/SAPO-34 followed by Fe-Co/K-Al2O3 (T-InS/B-FeCo) and a dual-layer packing of Fe-Co/K-Al2O3 above In2O3/SAPO-34 (T-FeCo/B-InS) is investigated. The M-InS/Fe-Co and T-FeCo/B-InS catalysts show a light olefins yield of 11.5 and 16.2% which are lower than that (18.9%) of the single Fe-Co/K-Al2O3 catalyst. A drastic reduction in the BET surface area (42 m2 g−1) of M-InS/Fe-Co catalyst compared to its theoretical value of 198 m2 g−1 is observed, suggesting the pores blockage. The T-InS/B-FeCo composite catalyst achieves a state-of the art light olefins yield of 21.5% due to a selective CO2 conversion to light olefins over In2O3/SAPO-34 and a highly active CO2 conversion to hydrocarbon over Fe-Co/K-Al2O3 which further converts the remaining CO2 from the former catalyst bed to light olefins and other hydrocarbon products until equilibrium CO2 conversion is reached.

Original languageBritish English
Pages (from-to)316-327
Number of pages12
JournalTopics in Catalysis
Volume64
Issue number5-6
DOIs
StatePublished - May 2021

Keywords

  • Catalysts bed configuration
  • CO hydrogenation
  • Fe-based catalysts
  • InO/SAPO-34
  • Light olefins

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