Selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol over copper catalysts

Huang, Zhiwei; Chen, Jing; Jia, Yuqing; Liu, Hailong; Xia, Chungu; Liu, Haichao

doi:10.1016/j.apcatb.2013.09.014

Cited by 72 publications

(46 citation statements)

References 36 publications

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“…S7 of the supplementary material). The reduced sample shows two XRD peaks at 43.3 and 50.4 o , which can be assigned to metallic copper in agreement with the literature reports [28,[68][69][70]. As well, these two peaks were merged with the MgO peaks, hence the calculation of average crystallite size of the Cu species was not possible for the reduced one.…”

Section: Stability and Reusability Testsupporting

confidence: 50%

Development of cerium promoted copper–magnesium catalysts for biomass valorization: Selective hydrogenolysis of bioglycerol

Mallesham

Sudarsanam

Reddy

et al. 2016

Applied Catalysis B: Environmental

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Section: Stability and Reusability Testsupporting

confidence: 50%

Development of cerium promoted copper–magnesium catalysts for biomass valorization: Selective hydrogenolysis of bioglycerol

Mallesham

Sudarsanam

Reddy

et al. 2016

Applied Catalysis B: Environmental

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“…As a result, the product distribution was dramatically changed with 1,2-PG selectivity overwhelming that of EG (30.7 % vs. 16.6 %) in the presence of an optimal catalyst (50 %WO 3 /Al 2 O 3 + C act ) [26]. In addition, and quite different from many previous studies in which hexitols were used as feedstock or reaction intermediates for the hydrogenolysis to form 1,2-PG and EG [55,[126][127][128][129][130][131][132][133], hexitols formation is competing with the glucose degradation in the DLEG process. The hexitols formed are found to be stable under the reaction conditions and cannot be further converted into EG and 1,2-PG [17,115].…”

Section: Catalysts and Reaction Mechanismmentioning

confidence: 62%

“…The reaction mechanism mainly involves hydrolytic hydrogenation of cellulose to hexitols and the subsequent hydrogenolysis of hexitols to 1,2-PG and EG. As shown in many other extensive studies, the basic sites and metallic dehydrogenation and hydrogenation sites play synergistic roles in polyol conversion to 1,2-PG and EG [55,[126][127][128][129][130][131][132][133].…”

Section: Catalysts and Reaction Mechanismmentioning

confidence: 99%

Mechanism and Kinetic Analysis of the Hydrogenolysis of Cellulose to Polyols

Wang

Pang

et al. 2016

Green Chemistry and Sustainable Technology

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The catalytic hydrogenolysis of cellulose to polyols represents an attractive process for biomass conversion to value-added products with a high atom economy. In the past decade, extensive studies have been conducted and promptly accumulated a rich knowledge in this field. In this chapter, we focus on the review of reaction mechanisms and kinetics after a brief description of the catalyst development for this process. In view of the different polyol products, the present review is mainly composed of two parts: cellulose conversion to sugar alcohols and cellulose hydrogenolysis to ethylene glycol and 1,2-propylene glycol. The reaction mechanisms are discussed and summarized to obtain general rules in terms of the specific performance of various catalysts. The reaction kinetics of cellulose hydrogenolysis are analyzed on the basis of the kinetics of the individual reaction steps and their correlations in the whole route covering in detail the reactions of cellulose hydrolysis, sugar hydrogenation, retro-aldol condensation, and sugar condensations. Finally, the prospective for the reaction mechanism and kinetics study of cellulose hydrogenolysis is presented.

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“…The UV−vis DRS E g value allows for the discrimination of slightly distorted isolated WO 4 /WO 6 (E g > 4.4 eV) and polymeric structure (E g < 4.0 eV). Both highly distorted WO 4 were measured by NH 3 -TPD and Py-FTIR spectra. NH 3 -TPD profiles and the total acid amount of the reduced samples are shown in Figure S2 and Table 1, respectively.…”

Section: Catalytic Reactionmentioning

confidence: 99%

Effect of WO_x on Bifunctional Pd–WO_x/Al₂O₃ Catalysts for the Selective Hydrogenolysis of Glucose to 1,2-Propanediol

Zhang

Sun³

et al. 2015

ACS Catal.

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A series of Pd−WO x /Al 2 O 3 catalysts with different contents of WO x were prepared by stepwise incipient wetness impregnations. The influence of WO x on the physicochemical properties of Pd−WO x /Al 2 O 3 catalysts, as well as their catalytic performance for the hydrogenolysis of glucose to 1,2-propanediol (1,2-PDO), was investigated. At low surface W density (0.3−2.1 W nm −2 ), distorted isolated WO x and oligomeric WO x are present on the Pd−WO x /Al 2 O 3 catalysts. Furthermore, isolated WO 4 are the dominating species on the Pd−WO x (5%)/Al 2 O 3 catalyst. When the W density increased to 3.1 W nm −2 , polymeric WO x species are dominant on the Pd−WO x (30%)/Al 2 O 3 catalyst. The Pd surface area decreased while the acid amount increased with increasing W density. Furthermore, increased Lewis acid sites are provided by isolated WO 4 and oligomeric WO x species whereas increased Brønsted acid sites exist on polymeric WO x species. Lewis acid sites promote glucose isomerization to fructose, which is an intermediate in glucose hydrogenolysis to 1,2-PDO. Metal sites catalyze CO hydrogenation and C−C hydrogenolysis, which avoid the coke formation on catalysts. 1,2-PDO selectivity is dependent on the synergy of Lewis acid and metal sites; however, Brønsted acid sites have no contribution to the 1,2-PDO production. Typically, the Pd−WO x (5%)/Al 2 O 3 catalyst possessing the optimal balance of Lewis acid and the metal site shows a 1,2-PDO selectivity of 60.8% at a glucose conversion of 92.2% and has a lifetime of over 200 h.

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Selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol over copper catalysts

Cited by 72 publications

References 36 publications

Development of cerium promoted copper–magnesium catalysts for biomass valorization: Selective hydrogenolysis of bioglycerol

Development of cerium promoted copper–magnesium catalysts for biomass valorization: Selective hydrogenolysis of bioglycerol

Mechanism and Kinetic Analysis of the Hydrogenolysis of Cellulose to Polyols

Effect of WO_x on Bifunctional Pd–WO_x/Al₂O₃ Catalysts for the Selective Hydrogenolysis of Glucose to 1,2-Propanediol

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Selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol over copper catalysts

Cited by 72 publications

References 36 publications

Development of cerium promoted copper–magnesium catalysts for biomass valorization: Selective hydrogenolysis of bioglycerol

Development of cerium promoted copper–magnesium catalysts for biomass valorization: Selective hydrogenolysis of bioglycerol

Mechanism and Kinetic Analysis of the Hydrogenolysis of Cellulose to Polyols

Effect of WOx on Bifunctional Pd–WOx/Al2O3 Catalysts for the Selective Hydrogenolysis of Glucose to 1,2-Propanediol

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Effect of WO_x on Bifunctional Pd–WO_x/Al₂O₃ Catalysts for the Selective Hydrogenolysis of Glucose to 1,2-Propanediol