Hydrodeoxygenation of 2-ethylphenol as a model compound of bio-crude over sulfided Mo-based catalysts: Promoting effect and reaction mechanism

Romero, Y.; Richard, Frédéric; Brunet, Sylvette

doi:10.1016/j.apcatb.2010.05.031

Cited by 276 publications

(181 citation statements)

References 69 publications

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“…Earlier studies on hydrodeoxygenation of phenolics used the industrial hydrodesulfurization catalysts (CoMoS and NiMoS) at 200-400 1C and high hydrogen pressures (Odebunmi and Ollis, 1983;Weigold, 1982;Laurent and Delmon, 1993;Massoth et al, 2006;Romero et al, 2010). Two reaction pathways were proposed based on the product distributions (Odebunmi and Ollis, 1983;Massoth et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Vapor phase hydrodeoxygenation and hydrogenation of m-cresol on silica supported Ni, Pd and Pt catalysts

Chen

Yang

et al. 2015

Chemical Engineering Science

103

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Section: Introductionmentioning

confidence: 99%

Vapor phase hydrodeoxygenation and hydrogenation of m-cresol on silica supported Ni, Pd and Pt catalysts

Chen

Yang

et al. 2015

Chemical Engineering Science

103

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“…In this mechanism, H2 interacts with sulfur atoms on the MoS2 surface and forms H2S and a coordinatively unsaturated site. This vacant site can chemisorb oxygenates, the oxygen atom of which oxidizes the catalyst while hydrocarbon products are formed with or without further hydrogenation (Romero et al, 2010). Thus, it is clear that the presence of H2 is necessary for the catalyst to proceed with deoxygenation.…”

Section: Conventional Hydrotreating Catalystsmentioning

confidence: 99%

A comprehensive review on biodiesel purification and upgrading

2017

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HIGHLIGHTS Various biodiesel purification methods, i.e., equilibrium-based, affinity-based, and reaction-based separation techniques along with membrane technology and solid-liquid separation processes were reviewed.Deoxygenating process via hydrodeoxygenation and decarboxylation/decarbonylation pathways is a common way to upgrade bio-based oils to produce biorenewable diesel with excellent fuel properties. Catalysts and operating conditions, i.e., pressure, temperature, and contact time, are the most important variables in biodiesel upgrading discussed herein. Serious environmental concerns regarding the use of fossil-based fuels have raised awareness regarding the necessity of alternative clean fuels and energy carriers. Biodiesel is considered a clean, biodegradable, and non-toxic diesel substitute produced via the transesterification of triglycerides with an alcohol in the presence of a proper catalyst. After initial separation of the by-product (glycerol), the crude biodiesel needs to be purified to meet the standard specifications prior to marketing. The presence of impurities in the biodiesel not only significantly affects its engine performance but also complicates its handling and storage. Therefore, biodiesel purification is an essential step prior to marketing. Biodiesel purification methods can be classified based on the nature of the process into equilibrium-based, affinity-based, membrane-based, reaction-based, and solid-liquid separation processes. The main adverse properties of biodiesel -namely moisture absorption, corrosiveness, and high viscosity -primarily arise from the presence of oxygen. To address these issues, several upgrading techniques have been proposed, among which catalytic (hydro)deoxygenation using conventional hydrotreating catalysts, supported metallic materials, and most recently transition metals in various forms appear promising. Nevertheless, catalyst deactivation (via coking) and/or inadequacy of product yields necessitate further research. This paper provides a comprehensive overview on the techniques and methods used for biodiesel purification and upgrading. ABSTRACT

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“…Richard and co-workers [76] proposed a mechanism for HDO of 2-ethylphenol over a CoMoS/Al 2 O 3 catalyst by direct deoxygenation and HDO as indicated in Figure 8 and Figure 9.…”

Section: Furfural (Fal)mentioning

confidence: 99%

Hydrodeoxygenation of model compounds and catalytic systems for pyrolysis bio-oils upgrading

Wang

2012

Catalysis for Sustainable Energy

119

147

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Hydrodeoxygenation of 2-ethylphenol as a model compound of bio-crude over sulfided Mo-based catalysts: Promoting effect and reaction mechanism

Cited by 276 publications

References 69 publications

Vapor phase hydrodeoxygenation and hydrogenation of m-cresol on silica supported Ni, Pd and Pt catalysts

Vapor phase hydrodeoxygenation and hydrogenation of m-cresol on silica supported Ni, Pd and Pt catalysts

A comprehensive review on biodiesel purification and upgrading

Hydrodeoxygenation of model compounds and catalytic systems for pyrolysis bio-oils upgrading

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