Facile one-step synthesis of hierarchical porous carbon monoliths as superior supports of Fe-based catalysts for CO2 hydrogenation

Chengyi Dai, Anfeng Zhang, Min Liu, Junjie Li, Fangyu Song, Chunshan Song, Xinwen Guo

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

A versatile strategy involving one-step desilication of coke-deposited spent zeolite catalyst was successfully developed to prepare hierarchical porous carbon monoliths (HPCMs). Such a strategy avoids the use of hard or soft templates and carbon sources, eliminates high temperature carbonization, simultaneously minimizing the emissions from processing spent catalysts. The resulting carbon exhibits a controlled morphology such as three-dimensional networks, hollow spheres or nanosheets, a high degree of graphitization and a multi-level porous structure. Its mesopore (2-50 nm) surface area can reach 522 m2 g-1 and both mesopore and macropore (50-350 nm) volumes are more than 1.0 cm3 g-1. Such hierarchical porous carbon was found to be a superior support for minimizing the nanoparticle size and enhancing the synergism of the Fe-K catalyst for promoting CO2 hydrogenation. Using such a catalyst results in increased conversion of carbon dioxide and enhanced selectivity of high value olefins (C2-4) and long-chain hydrocarbons (C5+).

Original languageEnglish (US)
Pages (from-to)10831-10836
Number of pages6
JournalRSC Advances
Volume6
Issue number13
DOIs
StatePublished - Jan 1 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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