Hydrodeoxygenation and hydroisomerization of palmitic acid over bi-functional Co/H-ZSM-22 catalysts

Cao, Yaya; Shi, Yanchun; Bi, Yingpu; Wu, Kejing; Hu, Shaojian; Wu, Yulong; Huang, Shaobin

doi:10.1016/j.fuproc.2017.09.020

Cited by 56 publications

(16 citation statements)

References 31 publications

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“…However, to maintain the catalyst stability, the introduction of S-containing agent into the feedstock causes the formation of undesirable products contaminated with sulfur and also increases the operating cost [7][8][9] . In the recent decade, it has paid great attention to develop sulfurfree metal catalysts, and the noble and base metal catalysts (e.g., Pt, Pd [10][11][12] , Ni [13] and Co [14] ) have been widely explored. Because the noble metals are scarce and expensive, the metallic Nibased catalysts are more attractive.…”

Section: Introductionmentioning

confidence: 99%

Remarkably reducing carbon loss and H2 consumption on Ni–Ga intermetallic compounds in deoxygenation of methyl esters to hydrocarbons

Zhao

Zheng

Chen

2020

Journal of Energy Chemistry

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Section: Introductionmentioning

confidence: 99%

Remarkably reducing carbon loss and H2 consumption on Ni–Ga intermetallic compounds in deoxygenation of methyl esters to hydrocarbons

Zhao

Zheng

Chen

2020

Journal of Energy Chemistry

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“…This can be attributed to the higher Lewis and Brønsted acidity of HZSM‐5 than that of SiO 2 . [ 10,27 ] The acetone molecules can be converted to alcohols intermediates through HYD reaction. The C‐O groups of alcohols intermediates can be adsorbed on the acids sites of HZSM‐5.…”

Section: Resultsmentioning

confidence: 99%

Catalytic upgrading of bio‐oil: Hydrodeoxygenation study of acetone as molecule model of ketones

et al. 2020

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The complexity of composition of bio‐oil from biomass makes it difficult to produce upgraded bio‐oil via hydrodeoxygenation. In this paper, acetone is thus considered as a model compound of the ketones family abundant in pyrolysis bio‐oil. Results showed that high conversion rates of acetone between 86.6% and 91.9% were observed with the use of HZSM‐5, 5% Ni2P/HZSM‐5, and 10% Ni2P/HZSM‐5 catalysts. In most cases, CO2, C2H6, C3H6, and C3H8 were the dominant non‐condensable gas products. For liquid phase, the selectivity was evaluated for different catalysts relative to ethanol, acetaldehyde, and aromatic hydrocarbons. A lower temperature favoured the formation of acetaldehyde and methyl isobutyl ketone with the 5% Ni2P/HZSM‐5 catalyst, while higher temperatures increased the proportion of aromatic hydrocarbons. The principal influencing parameters of acetone HDO were temperature and contact time followed by reaction pressure and H2 partial pressure. Optimal conditions give a selectivity of 49% of aromatics (benzene, toluene, and xylene) with the use of the 5% Ni2P/HZSM‐5 catalyst. The pathway of the main reactions of acetone HDO was also proposed. MIK and aromatic hydrocarbons were formed by a multiple step aldol condensation reaction of acetone molecules followed by further hydrogenation.

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“…This can cause unwanted S-contamination in the end product and thus harmful environmental problems. Taking into account the above, research efforts in the last decade have progressively turned to the metallic form of the transition metals (e.g., Ni, Co, Fe), ,− metal carbide, − metal phosphide, − and metal nitride , catalysts.…”

Section: Introductionmentioning

confidence: 99%

Biodiesel Upgrading to Renewable Diesel over Nickel Supported on Natural Mordenite Catalysts

Fani

Lycourghiotis

Bourikas

et al. 2021

Ind. Eng. Chem. Res.

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In the present work the valorization of natural mordenite as a catalyst support was investigated. Natural mordenite of Greek origin was activated by acid treatment with an aqueous solution of HCl. This treatment led to a material with a high specific surface area (156 m2 g–1). Ni catalysts (10 wt % Ni) supported on activated mordenite were synthesized by incipient wetness impregnation (IWI), wet impregnation (WI), infiltration (INF), and deposition–precipitation (DP). They were evaluated for the biodiesel upgrading into renewable diesel via hydrotreatment. DP was proven to be the most effective preparation method. In fact, an almost total conversion of biodiesel and production of the highest amount of green diesel (14 wt % of the liquid product) was achieved over the catalyst prepared by DP. Its high efficiency was attributed to its enhanced specific surface area, better nickel dispersion (smaller size of crystallites), and the smaller amount of carbon deposits on its surface compared to the other catalysts of this series. When the DP method was adopted, nickel catalysts supported on activated mordenite were synthesized varying active phase loading in the range 10–30 wt %. The catalyst with the maximum nickel loading exhibited high specific surface area and the highest Ni surface area as well as a balanced population of weak and strong acid sites. These characteristics resulted in the highest efficiency for green diesel production (25 wt % of the liquid product) among the catalysts studied.

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Hydrodeoxygenation and hydroisomerization of palmitic acid over bi-functional Co/H-ZSM-22 catalysts

Cited by 56 publications

References 31 publications

Remarkably reducing carbon loss and H2 consumption on Ni–Ga intermetallic compounds in deoxygenation of methyl esters to hydrocarbons

Remarkably reducing carbon loss and H2 consumption on Ni–Ga intermetallic compounds in deoxygenation of methyl esters to hydrocarbons

Catalytic upgrading of bio‐oil: Hydrodeoxygenation study of acetone as molecule model of ketones

Biodiesel Upgrading to Renewable Diesel over Nickel Supported on Natural Mordenite Catalysts

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