Dimethoxymethane production via CO2 hydrogenation in methanol over novel Ru based hierarchical BEA

Waqar Ahmad, Fan Liang Chan, Abhijit Shrotri, Yayati Naresh Palai, Huanting Wang, Akshat Tanksale

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Dimethoxymethane (DMM), a diesel blend fuel, is being researched with high interest recently due to its unique fuel properties. It is commercially produced via a two step-process of methanol oxidation to make formaldehyde, followed by its condensation with methanol. This study presents a one-pot method of DMM synthesis from methanol mediated carbon dioxide hydrogenation over novel heterogeneous catalysts. The effect of catalyst pore structure was investigated by synthesizing 3 wt% Ru over novel hierarchical zeolite beta (HBEASX) and comparing against Ru doped commercial zeolite beta (CBEA) and desilicated hierarchical zeolite beta (HBZDS). The results showed that 3%Ru/HBEASX provided the best activity for DMM production due to its large average pore size. It also showed the decisive role of SiO2/Al2O3 molar ratio, with SiO2/Al2O3 = 75 providing the highest DMM yield of 13.2 mmol/gcat.LMeOH with ca. 100% selectivity. The activity of 3%Ru/HBEAS3 after 5 recycle steps demonstrated the reusability of this catalyst.

Original languageEnglish
Pages (from-to)181-189
Number of pages9
JournalJournal of Energy Chemistry
Volume66
DOIs
Publication statusPublished - Mar 2022

Keywords

  • CO hydrogenation
  • Dimethoxymethane
  • Hierarchical BEA
  • Methanol solvent
  • Ru catalysts
  • SiO/AlO molar ratio

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