Direct conversion of cellulose to high-yield methyl lactate over Ga-doped Zn/H-nanozeolite Y catalysts in supercritical methanol

Verma, Deepak; Insyani, Rizki; Suh, Young‐Woong; Kim, Seung Min; Kim, Seok Ki; Kim, Jae-Hoon

doi:10.1039/c7gc00432j

Cited by 65 publications

(39 citation statements)

References 56 publications

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“…However, the reaction system was possibly contaminated by the addition of alkali metal ions. In a recent report, a Ga‐doped Zn/H−Y catalyst was described that gave excellent MLA yield because of its finely tuning Lewis acid and Brønsted acid sites, MLA yield was produced in 57.8 % yield from cellulose in near‐critical methanol conditions, whereas the harsh reaction conditions facilitated the occurrence of side reactions . Additionally, solid base catalysts such as MgO, has also been utilized for the production of MLA from carbohydrates.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Production of Methyl Lactate from Carbohydrates Using an Ionic Liquid Functionalized Sn‐Containing Catalyst

et al. 2018

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Considerable progress has been made recently in the catalytic conversion of renewable biomass resources to methyl lactate (MLA). However, conceiving eco-friendly and effective catalytic systems for the production of MLA from biomass carbohydrates remains a key challenge. Herein, we report a multifunctional catalyst Sn(salen)/IL, consisting of a Sn(salen) complex and an imidazolium-based ionic liquid (IL), which acts via an intramolecular synergistic effect to convert carbohydrates to MLA in methanol. The versatile properties of the resultant catalyst were revealed to be responsible for the conversion of fructose to MLA and the efficient suppression of undesired side reactions. This catalyst displayed outstanding catalytic activity, high selectivity, and excellent recyclability, giving an MLA yield of up to 68.9 % at 160 8C after 2 h. The results of this study will contribute to new approaches for designing synergistic catalysts for producing liquid fuels and chemicals from biomass resources.

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Section: Introductionmentioning

confidence: 99%

Synergistic Production of Methyl Lactate from Carbohydrates Using an Ionic Liquid Functionalized Sn‐Containing Catalyst

et al. 2018

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“…The high EL yield attained resulted from the synergistic effect of the relatively strong Lewis and weak Brønsted acidity of Zr‐SBA‐15, and the presence of water, together with the surface hydrophobicity of Zr‐SBA‐15, facilitated cleavage of the β‐1,4‐glycosidic bond of cellulose. Similarly, a Ga‐doped Zn/H‐nanozeolite could efficiently catalyze the conversion of cellulose into ML in supercritical methanol (280 °C), affording 57.8 % ML yield within 3 h. The high efficiency of Ga‐doped Zn/H‐nanozeolite resulted from its relatively strong Lewis and weak Brønsted acidity through the doping of Ga into ZnO.…”

Section: Catalytic Processes With a Decrease In Carbon Numbermentioning

confidence: 99%

Catalytic Upgrading of Biomass‐Derived Sugars with Acidic Nanoporous Materials: Structural Role in Carbon‐Chain Length Variation

Saravanamurugan

et al. 2018

ChemSusChem

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Shifting from petroleum‐based resources to inedible biomass for the production of valuable chemicals and fuels is one of the significant aspects in sustainable chemistry for realizing the sustainable development of our society. Various renowned biobased platform molecules, such as 5‐hydroxymethylfurfural, furfural, levulinic acid, and lactic acid, are successfully accessible from the transformation of biobased sugars. To achieve the specific reaction routes, heterogeneous nanoporous acidic materials have served as promising catalysts for the conversion of bio‐sugars in the past decade. This Review summarizes advances in various nanoporous acidic materials for bio‐sugar conversion, in which the number of carbon atoms is variable and controllable with the assistance of the switchable structure of nanoporous materials. The major focus of this Review is on possible reaction pathways/mechanisms and the relationships between catalyst structure and catalytic performance. Moreover, representative examples of catalytic upgrading of biobased platform molecules to biochemicals and fuels through selective C−C cleavage and coupling strategies over nanoporous acidic materials are also discussed.

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“…Nonetheless, the aforementioned catalysts not presented high yields of lactates from cellulose directly. With respect to getting a high productivity of lactates from cellulose, Verma et al designed the Ga-doped Zn/H-nanozeolite Y catalysts, to be served the most efficient materials so far for converting cellulose directly into ML with 57.8% yield at 270°C, 5 h in supercritical methanol [123]. It is believed that due to the enhancement of Lewis acid sites along with the decrease of Brønsted acid sites which derived from doping of Ga on ZnO, together with large external surface areas of HNZY, were determined as the crucial parameters to highly converting cellulose into lactates.…”

Section: Cellulose To Lactatesmentioning

confidence: 99%

Chemocatalytic Production of Lactates from Biomass-Derived Sugars

Zhang

et al. 2018

International Journal of Chemical Engineering

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In recent decades, a great deal of attention has been paid to the exploration of alternative and sustainable resources to produce biofuels and valuable chemicals, with aims of reducing the reliance on depleting confined fossil resources and alleviating serious economic and environmental issues. In line with this, lignocellulosic biomass-derived lactic acid (LA, 2-hydroxypropanoic acid), to be identified as an important biomass-derived commodity chemical, has found wide applications in food, pharmaceuticals, and cosmetics. In spite of the current fermentation of saccharides to produce lactic acid, sustainability issues such as environmental impact and high cost derived from the relative separation and purification process will be growing with the increasing demands of necessary orders. Alternatively, chemocatalytic approaches to manufacture LA from biomass (i.e., inedible cellulose) have attracted extensive attention, which may give rise to higher productivity and lower costs related to product work-up. is work presents a review of the state-of-the-art for the production of LA using homogeneous, heterogeneous acid, and base catalysts, from sugars and real biomass like rice straw, respectively. Furthermore, the corresponding bio-based esters lactate which could serve as green solvents, produced from biomass with chemocatalysis, is also discussed. Advantages of heterogeneous catalytic reaction systems are emphasized. Guidance is suggested to improve the catalytic performance of heterogeneous catalysts for the production of LA.

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Direct conversion of cellulose to high-yield methyl lactate over Ga-doped Zn/H-nanozeolite Y catalysts in supercritical methanol

Abstract: For realizing sustainable bio-based refineries, it is crucial to obtain high yields of value-added chemicalsviadirect conversion of cellulose and lignocellulosic biomass.

Cited by 65 publications

References 56 publications

Synergistic Production of Methyl Lactate from Carbohydrates Using an Ionic Liquid Functionalized Sn‐Containing Catalyst

Synergistic Production of Methyl Lactate from Carbohydrates Using an Ionic Liquid Functionalized Sn‐Containing Catalyst

Catalytic Upgrading of Biomass‐Derived Sugars with Acidic Nanoporous Materials: Structural Role in Carbon‐Chain Length Variation

Chemocatalytic Production of Lactates from Biomass-Derived Sugars

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