IBS Publications Repository: Conversion of kraft lignin over hierarchical MFI Zeolite

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Conversion of kraft lignin over hierarchical MFI Zeolite

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Author(s): Kim S.-S.; Won Lee H.; Ryong Ryoo; Wookdong Kim; Hoon Park S.; Jeon J.-K.; Young-Kwon Park

Subject: aluminum, ; benzene, ; benzene derivative, ; ethylbenzene, ; Kraft lignin, ; lignin, ; phenol, ; SBA 15, ; SBA-15, ; silicon dioxide, ; toluene, ; xylene, ; zeolite, ; adsorption, ; article, ; catalysis, ; chemistry, ; comparative study, ; mass fragmentography, ; pressure, ; temperature, ; X ray diffraction, ; Adsorption, ; Aluminum, ; Benzene, ; Benzene Derivatives, ; Catalysis, ; Gas Chromatography-Mass Spectrometry, ; Lignin, ; Phenol, ; Pressure, ; Silicon Dioxide, ; Temperature, ; Toluene, ; X-Ray Diffraction, ; Xylenes, ; Zeolites

Journal: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.14, no.3, pp.2414 - 2418

Abstract: Catalytic pyrolysis of kraft lignin was carried out using pyrolysis gas chromatography/mass spectrometry. Hierarchical mesoporous MFI was used as the catalyst and another mesoporous material Al-SBA-15 was also used for comparison. The characteristics of mesoporous MFI were analyzed by X-ray diffraction patterns, N2 adsorption-desorption isotherms, and temperature programmed desorption of NH3. Two catalyst/lignin mass ratios were tested: 5/1 and 10/1. Aromatics and alkyl phenolics were the main products of the catalytic pyrolysis of lignin over mesoporous MFI. In particular, the yields of mono-aromatics such as benzene, toluene, ethylbenzene, and xylene were increased substantially by catalytic upgrading. Increase in the catalyst dose enhanced the production of aromatics further, which is attributed to decarboxylation, decarbonlyation, and aromatization reactions occurring over the acid sites of mesoporous MFI. Copyright © 2014 American Scientific Publishers All rights reserved.