Hydrodeoxygenation of bio-oil over Pt-based supported catalysts: importance of mesopores and acidity of the support to compounds with different oxygen contents

Wang, Yuxin; Wu, Jinhu; Wang, Shengnian

doi:10.1039/c3ra41405a

Cited by 62 publications

(23 citation statements)

References 26 publications

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“…Owing to tunable porosity and molecule shape selectivity, zeolites can be used as adsorbent, ion-exchange material and catalysts, and so on [7][8][9][10][11]. A large variety of reactions such as cracking, isomerization, dewaxing, dehydration, hydrodeoxygenation and alkylation can be accomplished with microporous zeolites [12][13][14][15][16][17][18]. Moreover, the applications of zeolites in the fields of separation, chemical sensors, anticorrosive coating, low-k materials, and hydrophilic antimicrobial coatings are a research hotspot at present [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Zhang

Liu

et al. 2018

Catalysts

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In this paper, a comparative study of MFI zeolite derived from different silica sources is presented. Dry gel conversion (DGC) method is used to synthesize silicalite-1 and ZSM-5 with MFI structure. Two kinds of silica sources with different particle sizes are used during the synthesis of MFI zeolite. The as-prepared samples were characterized by X-ray diffraction (XRD), N2-sorption, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and X-ray fluorescence spectrometer (XRF). From the characterization results, it could be seen that the high-quality coffin-like silicalite-1 was synthesized using silica sphere with particle size of 300 nm as silica source, with crystallization time being shortened to 2 h. The schematic diagram of silicalite-1 formation using silica sources with different particle sizes is summarized. ZSM-5 was obtained by adding Al atoms to raw materials during the synthesis of MFI zeolite. The performance of aqueous phase eugenol hydrodeoxygenation over Pd/C-ZSM-5 catalyst is evaluated.

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Section: Introductionmentioning

confidence: 99%

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Zhang

Liu

et al. 2018

Catalysts

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“…Owing to the different nature of supports, the physicochemical features of the catalysts are also very different, thus affecting the activity and selectivity in HDO reactions. The acid supports (γ‐Al 2 O 3 , zeolites) enhance the synergy between hydrogenation and cracking reactions, catalyzed respectively by the metal and the support, although the coke deposition is higher compared with non‐acid supports (SiO 2 , TiO 2 ). The application of γ‐Al 2 O 3 in HDO of bio‐oil is limited by its hydrophilic nature and acidity, which causes higher tendency to coke formation and thus faster deactivation than other supports.…”

Section: Bio‐oil Upgrading To Fuels By Hydrodeoxygenationmentioning

confidence: 99%

Recent research progress on bio‐oil conversion into bio‐fuels and raw chemicals: a review

Valle

Remiro

García-Gómez

et al. 2018

J of Chemical Tech & Biotech

144

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Recent advances in lignocellulosic biomass valorization for producing fuels and commodities (olefins and BTX aromatics) are gathered in this paper, with a focus on the conversion of bio-oil (produced by fast pyrolysis of biomass). The main valorization routes are: (i) conditioning of bio-oil (by esterification, aldol condensation, ketonization, in situ cracking, and mild hydrodeoxygenation) for its use as a fuel or stable raw material for further catalytic processing; (ii) production of fuels by deep hydrodeoxygenation; (iii) ex situ catalytic cracking (in line) of the volatiles produced in biomass pyrolysis, aimed at the selective production of olefins and aromatics; (iv) cracking of raw bio-oil in units designed with specific objectives concerning selectivity; and (v) processing in fluidized bed catalytic cracking (FCC) units. This review deals with the technological evolution of these routes, in terms of catalysts, reaction conditions, reactors, and product yields. A study has been carried out on the current state-of-knowledge of the technological capacity, advantages and disadvantages of the different routes, as well as on the prospects for the implementation of each route within the scope of the Sustainable Refinery. /jctb 2 -C 4 olefins 147 a % Relative area: Percentage of total peak area detected by GC/MS semi-quantitative analysis.

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“…Moreover, the use of hierarchical zeolites having a secondary porosity usually in the mesoporous range has also positively affected the HDO activity, as shown in Figure for the conversion of m‐cresol over hierarchical Pd/ZSM‐5. This effect has also been reported when using Pt supported on mesoporous ZSM‐5 as catalysts for the HDO of different model compounds; hence, it can be considered a direct effect of using zeolitic supports exhibiting mesoporosity.…”

Section: Bio‐oil Upgrading By Hdomentioning

confidence: 99%

Advanced biofuels production by upgrading of pyrolysis bio‐oil

Fermoso

Pizarro

Coronado

et al. 2017

WIREs Energy & Environment

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The present work is a review on the production of bio‐oils from biomass pyrolysis, with special emphasis on the different catalytic methods developed so far for the upgrading of this liquid fraction in order to significantly improve its properties, so it can be used as advanced biofuel. After a discussion of the main variables and factors affecting biomass pyrolysis, a number of processes are described here for bio‐oil upgrading, including catalytic pyrolysis, esterification, aldol condensation, ketonization, and hydrodeoxygenation (HDO). All of them are featured by the use of tailored catalysts that may play different roles, such as completing depolymerization of biomass, promoting deoxygenation reactions, and favoring CC bonds formation in order to increase the proportion of components present in the final bio‐oil within the range of liquid fuels.The review highlights the challenges that must still be faced for biomass pyrolysis/bio‐oil upgrading to become a commercial process. Among them, catalyst deactivation is a general issue to be considered as bio‐oil has a strong tendency to polymerize, forming carbonaceous deposits on the catalysts, and contains a large share of water with acidic pH that may damage the catalyst components in liquid‐phase upgrading treatments. Likewise, process integration of bio‐oil upgrading treatments, through more or less complex schemes, is an aspect that should be deeply analyzed in the future as it may be a key element determining the commercial feasibility of the overall process. WIREs Energy Environ 2017, 6:e245. doi: 10.1002/wene.245 This article is categorized under: Bioenergy > Science and Materials Bioenergy > Systems and Infrastructure

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Hydrodeoxygenation of bio-oil over Pt-based supported catalysts: importance of mesopores and acidity of the support to compounds with different oxygen contents

Cited by 62 publications

References 26 publications

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Recent research progress on bio‐oil conversion into bio‐fuels and raw chemicals: a review

Advanced biofuels production by upgrading of pyrolysis bio‐oil

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