Catalytic hydrodeoxygenation of m-cresol over Ni 2 P/hierarchical ZSM-5

Berenguer, Antonio; Bennett, James A.; Hunns, James A.; Moreno, Inés; Coronado, Juan M.; Lee, Adam F.; Pizarro, Patricia; Wilson, Karen; Serrano, David

doi:10.1016/j.cattod.2017.08.032

Cited by 78 publications

(51 citation statements)

References 52 publications

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“…Initially, Ni 2 P/SiO 2 produced 3‐methylcyclohexanol followed by the secondary reaction to produce methylcyclohexane. In contrast, Ni 2 P/ h ‐ZSM‐5 catalysts exhibited far more rapid conversion of intermediate methylcyclohexanol, before producing the final deoxygenated product, methylcyclohexane (Figure ) …”

Section: Hydrodeoxygenation Using H2mentioning

confidence: 99%

Catalytic Upgrading of Biomass Model Compounds: Novel Approaches and Lessons Learnt from Traditional Hydrodeoxygenation – a Review

et al. 2019

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Catalytic hydrodeoxygenation (HDO) is a fundamental process for bio-resources upgrading to produce transportation fuels or added value chemicals. The bottleneck of this technology to be implemented at commercial scale is its dependence on high pressure hydrogen, an expensive resource which utilization also poses safety concerns. In this scenario, the development of hydrogen-free alternatives to facilitate oxygen removal in biomass derived compounds is a major challenge for catalysis science but at the same time it could revolutionize biomass processing technologies. In this review we have analysed several novel approaches, including catalytic transfer hydrogenation (CTH), combined reforming and hydrodeoxygenation, metal hydrolysis and subsequent hydrodeoxygenation along with non-thermal plasma (NTP) to avoid the supply of external H 2 . The knowledge accumulated from traditional HDO sets the grounds for catalysts and processes development among the hydrogen alternatives. In this sense, mechanistic aspects for HDO and the proposed alternatives are carefully analysed in this work. Biomass model compounds are selected aiming to provide an in-depth description of the different processes and stablish solid correlations catalysts composition-catalytic performance which can be further extrapolated to more complex biomass feedstocks. Moreover, the current challenges and research trends of novel hydrodeoxygenation strategies are also presented aiming to spark inspiration among the broad community of scientists working towards a low carbon society where bio-resources will play a major role. Figure 1. Three basic phenylpropane monomers: (1) p-coumaryl alcohol; (2) coniferyl alcohol; (3) sinapyl alcohol.

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Section: Hydrodeoxygenation Using H2mentioning

confidence: 99%

Catalytic Upgrading of Biomass Model Compounds: Novel Approaches and Lessons Learnt from Traditional Hydrodeoxygenation – a Review

et al. 2019

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“…For instance, Ni 2 P/H-ZSM-5 and Ni 2 P/SiO 2 catalysts were compared for m-cresol HDO to methylcyclohexane. The higher activity of the zeolite-supported catalyst was ascribed to the synergy between the metal phosphide (which introduces new Lewis and Brønsted acid sites) and the solid acid support, with rates for the HDO of m-cresol that depend on Ni 2 P dispersion; this indicates that reaction is sensitive to the structure, with an optimum activity observed for a particle size of approximately 4 nm [124]. A similar bifunctional catalyst (Ni 3 P/HZSM-5) with Ni 3 P as the hydrogenation site and HZSM-5 as dehydration site was used for the HDO of phenol, catechol, and o-cresol, and showed excellent performance.…”

Section: Support Types and Influence On Reactivitymentioning

confidence: 99%

Transition Metal Phosphides for the Catalytic Hydrodeoxygenation of Waste Oils into Green Diesel

2019

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Recently, catalysts based on transition metal phosphides (TMPs) have attracted increasing interest for their use in hydrodeoxygenation (HDO) processes destined to synthesize biofuels (green or renewable diesel) from waste vegetable oils and fats (known as hydrotreated vegetable oils (HVO)), or from bio-oils. This fossil-free diesel product is produced completely from renewable raw materials with exceptional quality. These efficient HDO catalysts present electronic properties similar to noble metals, are cost-efficient, and are more stable and resistant to the presence of water than other classical catalytic formulations used for hydrotreatment reactions based on transition metal sulfides, but they do not require the continuous supply of a sulfide source. TMPs develop a bifunctional character (metallic and acidic) and present tunable catalytic properties related to the metal type, phosphorous-metal ratio, support nature, texture properties, and so on. Here, the recent progress in TMP-based catalysts for HDO of waste oils is reviewed. First, the use of TMPs in catalysis is addressed; then, the general aspects of green diesel (from bio-oils or from waste vegetable oils and fats) production by HDO of nonedible oil compounds are presented; and, finally, we attempt to describe the main advances in the development of catalysts based on TMPs for HDO, with an emphasis on the influence of the nature of active phases and effects of phosphorous, promoters, and preparation methods on reactivity.

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“…Transition metal phosphide such as Ni 2 P had also been applied in the HDO of lignin-derived feedstock recently [54][55][56][57]. The superiority of these transition metal Ni phosphide catalysts were high activity and low cost compared to noble metal catalysts.…”

Section: Monometallic Ni-based Catalysts For Hdo Of Ligninmentioning

confidence: 99%

Lignin Valorizations with Ni Catalysts for Renewable Chemicals and Fuels Productions

Chen

Guan

Tsang³

et al. 2019

Catalysts

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Energy and fuels derived from biomass pose lesser impact on the environmental carbon footprint than those derived from fossil fuels. In order for the biomass-to-energy and biomass-to-chemicals processes to play their important role in the loop of the circular economy, highly active, selective, and stable catalysts and the related efficient chemical processes are urgently needed. Lignin is the most thermal stable fraction of biomass and a particularly important resource for the production of chemicals and fuels. This mini review mainly focuses on lignin valorizations for renewable chemicals and fuels production and summarizes the recent interest in the lignin valorization over Ni and relevant bimetallic metal catalysts on various supports. Particular attention will be paid to those strategies to convert lignin to chemicals and fuels components, such as pyrolysis, hydrodeoxygenation, and hydrogenolysis. The review is written in a simple and elaborated way in order to draw chemists and engineers' attention to Ni-based catalysts in lignin valorizations and guide them in designing innovative catalytic materials based on the lignin conversion reaction.Catalysts 2019, 9, 488 2 of 39 processes to play their important role in the loop of the circular economy, first, the process must be energy efficient itself [2]. Second, according to Anastas's second principle [3], atom economy should be maximized and excess starting materials which will not be contained in the final product should be avoided. Thus, developing highly active and selective catalysts and enzymes is an urgent need. Current technology for lignocellulosic valorization includes biochemical fermentation, chemical and thermochemical methods using enzymes and metal catalysts, respectively. Thermochemical methods, including combustion, pyrolysis, and gasification, and chemical methods, such as hydrodeoxygenation (HDO), hydrogenolysis, and oxidative cleavage, have the advantages of higher throughputs due to the short reaction time, and thus are more suitable for commercialized and industrialized scale-up.Woody and herbaceous biomasses are large polymeric networks consisting of ca. 35-50% cellulose, 25-30% hemicellulose (glucomannan and glucuronoxylan), and 15-30% of lignin (macromolecular polymer networks with interconnected phenylpropane and phenol units with various formula, e.g., (C 31 H 34 O 11 ) n ) by weight. Lignin is one of the most thermal stable fractions and a particularly important resource for the production of chemicals and fuels. With careful design of the metal catalysts, either aromatic platform molecules, or fuels components such as naphthenes, can be preferentially produced in high yields and with high selectivity.Over the past decade, numerous monometallic and bimetallic metal catalysts using both precious and base metal precursors on various supports have been reported to successfully convert lignin into valuable products. Transition metals such as Ni (price = US$ 12.628/kg as of April 2019) are much more economically viable than precious metals...

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Catalytic hydrodeoxygenation of m-cresol over Ni 2 P/hierarchical ZSM-5

Cited by 78 publications

References 52 publications

Catalytic Upgrading of Biomass Model Compounds: Novel Approaches and Lessons Learnt from Traditional Hydrodeoxygenation – a Review

Catalytic Upgrading of Biomass Model Compounds: Novel Approaches and Lessons Learnt from Traditional Hydrodeoxygenation – a Review

Transition Metal Phosphides for the Catalytic Hydrodeoxygenation of Waste Oils into Green Diesel

Lignin Valorizations with Ni Catalysts for Renewable Chemicals and Fuels Productions

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