Roles of acidic sites in alumina catalysts for efficient d-xylose conversion to lactic acid

2020 ◽  
Vol 22 (24) ◽  
pp. 8572-8583
Author(s):  
Sirapassorn Kiatphuengporn ◽  
Anchalee Junkaew ◽  
Chuleeporn Luadthong ◽  
Sutarat Thongratkaew ◽  
Chakrit Yimsukanan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Lactic Acid ◽  
Lewis Acid ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
Acidic Sites ◽  
Alumina Catalysts

Active Lewis acid sites in γ-Al2O3 promote the catalytic activity for lactic acid production from d-xylose.

Dehydration of lactic acid to acrylic acid over lanthanum phosphate catalysts: the role of Lewis acid sites

2016 ◽  
Vol 18 (34) ◽  
pp. 23746-23754 ◽  
Author(s):  
Zhen Guo ◽  
De Sheng Theng ◽  
Karen Yuanting Tang ◽  
Lili Zhang ◽  
Lin Huang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acrylic Acid ◽  
Lewis Acid ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
Lanthanum Phosphate ◽  
Lewis Acidic Sites ◽  
Acidic Sites ◽  
Nano Rods

Lewis acidic sites on the surface of lanthanum phosphate nano-rods play a crucial role on the catalytic dehydration of lactic acid to acrylic acid.

Catalytic dehydrofluorination of 1,1,1,2-tetrafluoroethane to synthesize trifluoroethylene over a modified NiO/Al2O3 catalyst

2015 ◽  
Vol 5 (6) ◽  
pp. 3103-3107 ◽  
Author(s):  
Wenzhi Jia ◽  
Min Liu ◽  
Xuewei Lang ◽  
Chao Hu ◽  
Junhui Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Linear Relationship ◽  
Lewis Acid ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
Al2o3 Catalyst

The close linear relationship between Lewis acid sites and catalytic activity for the dehydrofluorination of CF3CFH2.

Lewis acid sites in MOFs supports promoting the catalytic activity and selectivity for CO esterification to dimethyl carbonate

2020 ◽  
Vol 10 (6) ◽  
pp. 1699-1707 ◽  
Author(s):  
Yu-Ping Xu ◽  
Zhi-Qiao Wang ◽  
Hong-Zi Tan ◽  
Kai-Qiang Jing ◽  
Zhong-Ning Xu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Lewis Acid ◽  
Dimethyl Carbonate ◽  
Metal Organic Frameworks ◽  
Acid Sites ◽  
Lewis Acidity ◽  
Catalyst Supports ◽  
Lewis Acid Sites ◽  
Metal Organic

We studied the effect of Lewis acidity in metal–organic frameworks (MOFs) on their activity as catalyst supports for the esterification of CO to dimethyl carbonate.

Nanocrystalline Rhenium-doped TiO2: an efficient catalyst in the one-pot conversion of carbohydrates into levulinic acid. The synergistic effect between Brønsted and Lewis acid sites

2021 ◽  
Author(s):  
Sorin Avramescu ◽  
Cristian D. Ene ◽  
Madalina Ciobanu ◽  
Josefine Schnee ◽  
François Devred ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Synergistic Effect ◽  
Lewis Acid ◽  
Levulinic Acid ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
One Pot ◽  
Efficient Catalyst ◽  
The One ◽  
Brønsted And Lewis Acid

Catalytic activity of TiO2, 2%Re-TiO2 and 10%Re-TiO2 in the conversion of carbohydrates into levulinic acid under autoclave conditions was evaluated. These materials were prepared by aerogel method and characterized by...

Crystalline niobium phosphates with water-tolerant and adjustable Lewis acid sites for the production of lactic acid from triose sugars

2018 ◽  
Vol 2 (7) ◽  
pp. 1530-1541 ◽  
Author(s):  
Xincheng Wang ◽  
Yongji Song ◽  
Chongpin Huang ◽  
Bin Wang
Keyword(s):  
Lactic Acid ◽  
Lewis Acid ◽  
Acid Sites ◽  
Acid Catalysts ◽  
Lewis Acid Sites ◽  
Lewis Acid Catalysts ◽  
Aqueous Conditions

Crystalline niobium phosphates: water-tolerant Lewis acid catalysts for the conversion of trioses to lactic acid under aqueous conditions.

scholarly journals Highly Selective Lewis Acid Sites in Desilicated MFI Zeolites for Dihydroxyacetone Isomerization to Lactic Acid

ChemSusChem ◽  
2013 ◽  
Vol 6 (5) ◽  
pp. 831-839 ◽  
Author(s):  
Pierre Y. Dapsens ◽  
Cecilia Mondelli ◽  
Javier Pérez-Ramírez
Keyword(s):  
Lactic Acid ◽  
Lewis Acid ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
Mfi Zeolites

Efficient conversion of cellulose to 5-hydroxymethylfurfural catalyzed by a cobalt-phosphonate catalyst

2020 ◽  
Vol 4 (11) ◽  
pp. 5795-5801 ◽  
Author(s):  
Xiao Liu ◽  
Xue Min ◽  
Hui Liu ◽  
Yuanqiao Cao ◽  
Yadong Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Lewis Acid ◽  
Acid Sites ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Lewis Acid Sites ◽  
Efficient Conversion ◽  
Brönsted Acid

A cobalt-phosphonate network catalyst containing both Brønsted acid and Lewis acid sites is designed and synthesized for the conversion of saccharides to HMF. The catalyst can be recycled four times without the loss of catalytic activity.

scholarly journals Furfural Hydrogenation on Modified Niobia

2019 ◽  
Vol 9 (11) ◽  
pp. 2287 ◽  
Author(s):  
Andrea Jouve ◽  
Stefano Cattaneo ◽  
Daniel Delgado ◽  
Nicola Scotti ◽  
Claudio Evangelisti ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Lewis Acid ◽  
Furfuryl Alcohol ◽  
Surface Acidity ◽  
High Surface ◽  
Pt Nanoparticles ◽  
Acid Sites ◽  
High Catalytic Activity ◽  
Lewis Acid Sites ◽  
Furfural Hydrogenation

In this study, niobia-based materials have been used as supports for Pt nanoparticles and used in the hydrogenation of furfural. The incorporation of dopants (W6+ and Ti4+) in the Nb2O5 structure induced modifications in the surface acidity of the support; in particular, the addition of W6+ increased the amount of Lewis acid sites, while the addition of Ti4+ decreased the number of Lewis acid sites. As a result, the catalytic activity towards the hydrogenation of furfural was affected; high surface acidity resulted in high catalytic activity. The selectivity of the reaction changed with the support acidity as well, with higher amount of furfuryl alcohol produced decreasing the Lewis acid sites.

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