Exceptionally active and stable catalysts for CO2 reforming of glycerol to syngas
Journal article, 2019

CO2 reforming of glycerol to syngas was studied on Al2O3-ZrO2-TiO2 (AZT) supported Rh, Ni and Co catalysts within 600–750 °C and a molar inlet CO2/glycerol ratio (CO2/G) of 1–4. Glycerol and CO2 conversions decreased in the following order: Rh/AZT > Ni/AZT > Co/AZT. Reactant conversions on Rh/AZT exceeded 90% of their thermodynamic counterparts at 750 °C and CO2/G = 2–4 at which the activity of Ni/AZT was boosted to ˜95% of the thermodynamic CO2 conversion upon increasing the residence time. The loss in CO2 conversions was below 13% during the 72 h longevity tests confirming the exceptional stability of Rh/AZT and Ni/AZT. However, Co/AZT suffered from sintering, carbon deposition and oxidation of Co sites, demonstrated via TEM-EDX, XPS, XANES and in-situ FTIR experiments. Characterization of Rh/AZT revealed no significant signs of deactivation. Ni/AZT preserved most of its original metallic pattern and gasified carbonaceous deposits during earlier stages of the reaction.

Carbon dioxide

Dry reforming

Glycerol

Synthesis gas

Author

Selin Bac

Bogazici Universitesi

Zafer Say

Chalmers, Physics, Chemical Physics

Bilkent Universitesi

Yusuf Kocak

Bilkent Universitesi

Kerem Emre Ercan

Bilkent Universitesi

Messaoud Harfouche

Synchrotron-Light for Experimental Science and Applications

Emrah Ozensoy

Bilkent Universitesi

Ahmet K. Avci

Bogazici Universitesi

Applied Catalysis B: Environmental

0926-3373 (ISSN) 1873-3883 (eISSN)

Vol. 256 117808

Subject Categories

Chemical Process Engineering

Other Chemical Engineering

Biocatalysis and Enzyme Technology

DOI

10.1016/j.apcatb.2019.117808

More information

Latest update

7/15/2019