Fe-containing nanoparticles used as effective catalysts of lignin reforming to syngas and hydrogen assisted by microwave irradiation
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Active iron-containing nanosized components have been formed on the lignin surface. The metal was deposited on the lignin from an ethanol solution of Fe(acac)3 and from a colloid solution of iron metal particles obtained beforehand by metal vapor synthesis. These active components are able to absorb microwave radiation and are suitable for microwave-assisted high-rate dehydrogenation and dry reforming of lignin without addition of a carbon adsorbent, as a supplementary radiation absorbing material, to the feedstock. The dependence of the solid lignin heating dynamics on the concentration of supported iron particles was investigated. The threshold Fe concentration equal to 0.5 wt.%, providing the highest rate of sample heating up to the reforming and plasma generation temperature was identified. The microstructure and magnetic properties of iron-containing nanoparticles supported on lignin were studied before and after the reforming. The Fe3O4 nanoparticles and also core-shell Fe3O4@γ-Fe-С nanostructures are formed during the reforming of lignin samples. The catalytic performance of iron-based nanoparticles toward the lignin conversion is manifested as increasing selectivity to hydrogen and syngas, which reaches 94% at the Fe concentration of 2 wt.%. It was found that with microwave irradiation under argon, hydrogen predominates in the gas. In the СО2 atmosphere, dry reforming takes place to give syngas with the СО/Н2 ratio of ~ 0.9. In both cases, the degree of hydrogen recovery from lignin reaches 90–94%.
KeywordsLignin Syngas Hydrogen Microwave irradiation Nanoparticles of Fe Catalysis
This investigation was carried out within the State Assignment of Fundamental Research to the A.V. Topchiev Institute of Petrochemical Synthesis of the RAS. The magnetic measurements were carried out within the State Assignment of Fundamental Research to the Kurnakov Institute of General and Inorganic Chemistry using the equipment of the JRC PMR IGIC RAS.
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Conflict of interest
The authors declare that they have no conflict of interest.
- Ellert OG, Petrunenko IA, Tsodikov MV, Bukhtenko OV, Kochubey DI, Maksimov Yu V, Dominguez-Rodriguez A (1996) Study of the formation mechanism of complex oxides obtained by the sol-gel method: influence of the structure of iron, aluminium and yttrium acetylacetonate precursors on the phase composition of the ZrO2 ceramics. J Mater Chem 6:207–212CrossRefGoogle Scholar
- Mingos DMP, Whittaker AG (1997) Microwave dielectric heating effects in chemical synthesis. In: Eldik RV, Hubbard CD (eds) Chemistry under extreme or non classical conditions, JohnWiley and sons, New York, pp 479–545Google Scholar
- Pozar D.M., 1998. Microwave engineering, second ed., John Wiley & Sons Inc., New YorkGoogle Scholar
- Rabinovich ML (2009) Wood hydrolysis industry in the soviet union and Russia: what can be learned from the history? The 2nd Nordic Wood Biorefinery Conference. Helsinki, Finland, pp 111–120Google Scholar
- Rodicheva GV, Orlovskii VP, Romanova NM, Steblevskii AV, Sukhanova GE (1996) Physicochemical investigation of Khibini apatite and its comparison to hydroxyapatite. Russ J Inorg Chem 41:728–731Google Scholar
- Rowell RM, Pettersen R, Han JS, Rowell JS, Tshabalala MA (2005) Cell wall chemistry, handbook of wood chemistry and wood composites. In: Rowell RM, editor. Boca Raton: Taylor & Francis Group, pp. 9–40Google Scholar
- Tsodikov MV, Chudakova MV, Chistyakov AV, Maksimov YV (2013) Catalytic conversion of cellulose into hydrocarbon fuel components. Neftekhim 53(6):414–420Google Scholar
- Tsodikov MV, Perederiy MA, Karaceva MS, Maksimov YV, Suzdalev IP, Gurko AA, Zhevago NK (2007) Formation of iron-containing catalysts on carbon carriers under the influence of microwave radiation. Nanotechnol Russ 1:34–39Google Scholar
- Yamada Y, Yoshida H, Kouno K, Kobayashi Y (2010) Iron carbide films produced by laser deposition. J Phys: Conf Series 217:01209Google Scholar