Gasification of hydrolysis lignin with CO2 in the presence of Fe and Co compounds

Medvedev, Artem A.; Kustov, Alexander L.; Beldova, Daria A.; Kravtsov, A.V.; Калмыков, К. Б.; Sarkar, Bipul; Kostyukhin, Egor M.; Кustov, Leonid М.

doi:10.1016/j.mencom.2022.05.038

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…Transition metal oxide catalysts are also important [37], and the same problems of the correlation between the composition, structure and catalytic behaviour have arisen and attempts to solve them are being made. For example, it was shown by in situ characterisation that Ni-based samples in biomass gasification formed nanoparticles of zero-valent Ni and the time and temperature at which the process took place decreased [38].…”

Section: Introductionmentioning

confidence: 99%

A Synergistic Effect of Potassium and Transition Metal Compounds on the Catalytic Behaviour of Hydrolysis Lignin in CO2-Assisted Gasification

et al. 2023

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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.

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Section: Introductionmentioning

confidence: 99%

A Synergistic Effect of Potassium and Transition Metal Compounds on the Catalytic Behaviour of Hydrolysis Lignin in CO2-Assisted Gasification

et al. 2023

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“…Gasification of carbon materials such as hydrolytic lignin at atmospheric pressure is a promising method of utilization, due to the relative simplicity of the method and thus low capital and operating costs. Carbon dioxide-assisted conversion of waste carbon materials is especially interesting due to the utilization of carbon dioxide, which is a greenhouse gas [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Method of Fe Deposition on the Surface of Hydrolytic Lignin on the Activity in the Process of Its Conversion in the Presence of CO2

Medvedev

Kustov

Beldova

et al. 2023

IJMS

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Hydrolytic lignin is one of the non-demanded carbon materials. Its CO2-assisted conversion is an important way to utilize it. The use of the catalysts prepared by metal deposition on the surface of hydrolytic lignin makes it possible to apply milder conditions of the conversion process with CO2 and to improve the economic indicators. The development of methods of deposition of the active phase is a problem of high importance for any heterogeneous catalytic processes. This work aimed at investigating the influence of the conditions of iron deposition on the surface of hydrolytic lignin on the process of CO2-assisted conversion of lignin. Different Fe precursors (Fe(NO3)3, FeSO4, Fe2(SO4)3), solvents (water, isopropanol, acetone, and ethanol), and concentrations of the solution were used; the properties of Fe/lignin composites were estimated by SEM, EDX, TEM, XRD methods and catalytic tests. All the prepared samples demonstrate a higher conversion compared to starting lignin itself in the carbon dioxide-assisted conversion process. The carbon dioxide conversion was up to 66% at 800 °C for the sample prepared from Fe(NO3)3 using a twofold water volume compared to incipient wetness water volume as a solvent (vs. 39% for pure lignin).

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“…The main efforts in catalytic processes development in the carbon wastes utilisation are focused on the following groups: alkali metals (for example, [ 24 , 25 , 26 , 27 , 28 , 29 ]), alkali–earth metals [ 30 , 31 , 32 ], and transition metals [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. Different natural and synthetic materials have been tested as carriers for the catalyst for carbon waste utilisation, for example, dolomite [ 44 ], olivine [ 45 , 46 ], or MgO [ 47 ], etc., but the main research is focused on the systems with metals directly deposited on the gasified (or pyrolyzed) material such as rice husk, etc., for example [ 48 , 49 , 50 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

CO2-Assisted Sugar Cane Gasification Using Transition Metal Catalysis: An Impact of Metal Loading on the Catalytic Behavior

Beldova,

Medvedev,

Kustov

et al. 2023

Materials

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To meet the increasing needs of fuels, especially non-fossil fuels, the production of “bio-oil” is proposed and many efforts have been undertaken to find effective ways to transform bio-wastes into valuable substances to obtain the fuels and simultaneously reduce carbon wastes, including CO2. This work is devoted to the gasification of sugar cane bagasse to produce CO in the process assisted by CO2. The metals were varied (Fe, Co, or Ni), along with their amounts, in order to find the optimal catalyst composition. The materials were investigated by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), and electron diffraction, and were tested in the process of CO2-assisted gasification. The catalysts based on Co and Ni demonstrate the best activity among the investigated systems: the conversion of CO2 reached 88% at ~800 °C (vs. 20% for the pure sugarcane bagasse). These samples contain metallic Co or Ni, while Fe is in oxide form.

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Gasification of hydrolysis lignin with CO2 in the presence of Fe and Co compounds

Cited by 5 publications

References 25 publications

A Synergistic Effect of Potassium and Transition Metal Compounds on the Catalytic Behaviour of Hydrolysis Lignin in CO2-Assisted Gasification

A Synergistic Effect of Potassium and Transition Metal Compounds on the Catalytic Behaviour of Hydrolysis Lignin in CO2-Assisted Gasification

Influence of the Method of Fe Deposition on the Surface of Hydrolytic Lignin on the Activity in the Process of Its Conversion in the Presence of CO2

CO2-Assisted Sugar Cane Gasification Using Transition Metal Catalysis: An Impact of Metal Loading on the Catalytic Behavior

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