A Synergistic Effect of Potassium and Transition Metal Compounds on the Catalytic Behaviour of Hydrolysis Lignin in CO<sub>2</sub>-Assisted Gasification
Artem A. Medvedev,
Alexander L. Kustov,
Daria A. Beldova,
Svetlana B. Polikarpova,
Valeriy E. Ponomarev,
Elena V. Murashova,
Pavel V. Sokolovskiy,
Leonid M. Kustov
Affiliations
Artem A. Medvedev
Chemistry Department, Moscow State University, 119992 Moscow, Russia
Alexander L. Kustov
Chemistry Department, Moscow State University, 119992 Moscow, Russia
Daria A. Beldova
Chemistry Department, Moscow State University, 119992 Moscow, Russia
Svetlana B. Polikarpova
N.V. Sklifosovskiy Institute of Clinical Medicine, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
Valeriy E. Ponomarev
N.V. Sklifosovskiy Institute of Clinical Medicine, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
Elena V. Murashova
Chemistry Department, Moscow State University, 119992 Moscow, Russia
Pavel V. Sokolovskiy
Chemistry Department, Moscow State University, 119992 Moscow, Russia
Leonid M. Kustov
Chemistry Department, Moscow State University, 119992 Moscow, Russia
CO2-assisted gasification of carbon-based waste materials is one of the processes that both utilises waste carbon chemicals and produces CO, which is a highly sought after raw material. In this work, we aimed at finding and clarifying the synergistic effects of simultaneous potassium and Fe, Co, or Ni-driven catalysis. To reveal the behaviour of such systems, a series with different potassium loadings and a fixed second metal loading of 5 wt.% was prepared. The following methods were applied for this purpose: SEM, TEM, EDX, XRD, electron diffraction, and catalytic tests. The most active sample was found to be 3 wt.% K and 5 wt.% Co- or Fe-loaded hydrolysis lignin. The attained CO2 conversion was up to 92%, while the pure lignin sample demonstrated only 62% conversion under the same conditions.
