Deoxygenation of Ethers and Esters over Bifunctional Pt-Heteropoly Acid Catalyst in the Gas Phase

Alharbi, Khadijah, Alharbi, Walaa, Kozhevnikova, Elena F and Kozhevnikov, Ivan V ORCID: 0000-0003-2453-5256
(2016) Deoxygenation of Ethers and Esters over Bifunctional Pt-Heteropoly Acid Catalyst in the Gas Phase. ACS CATALYSIS, 6 (3). pp. 2067-2075.

[img] Text
Khadijah paper ACS Catal corr.docx - Author Accepted Manuscript

Download (238kB)


Deoxygenation and decomposition of ethers and esters, including anisole, diisopropyl ether (DPE), and ethyl propanoate (EP), was investigated using bifunctional metal–acid catalysis at a gas–solid interface in the presence and absence of hydrogen. The bifunctional catalysts studied comprised Pt, Ru, Ni, and Cu as the metal components and Cs2.5H0.5PW12O40 (CsPW), an acidic Cs salt of Keggin-type heteropoly acid (HPA) H3PW12O40, as the acid component, with the main focus on Pt–CsPW catalyst. It was found that bifunctional metal–acid catalysis in the presence of H2 is more efficient for ether and ester deoxygenation than the corresponding monofunctional metal and acid catalysis and that metal- and acid-catalyzed pathways play different roles in these reactions. With Pt-CsPW, hydrodeoxygenation of anisole, a model for the deoxygenation of lignin, occurred with 100% yield of cyclohexane under very mild conditions (60–100 °C and 1 bar of H2). This catalyst had the highest activity in anisole deoxygenation for a gas-phase catalyst system reported so far. The catalyst activity decreased in the order of metals: Pt ≫ Ru > Ni > Cu. For HPA-catalyzed DPE and EP decomposition, relationships between the turnover reaction rate (turnover frequency) and the HPA acid strength were found, which can be used to predict the activity of acid catalysts in these reactions.

Item Type: Article
Uncontrolled Keywords: deoxygenation, anisole, diisoproplyl ether, ethyl propanoate, bifunctional catalysis, platinum, heteropoly acid
Depositing User: Symplectic Admin
Date Deposited: 24 Jun 2016 08:51
Last Modified: 19 Jan 2023 07:35
DOI: 10.1021/acscatal.6b00096
Related URLs: