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.

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.

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

scholarly journals Recent Advances in the Brønsted/Lewis Acid Catalyzed Conversion of Glucose to HMF and Lactic Acid: Pathways toward Bio-Based Plastics

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1395
Author(s):  
Cristina Megías-Sayago ◽  
Sara Navarro-Jaén ◽  
Fabien Drault ◽  
Svetlana Ivanova
Keyword(s):  
Lactic Acid ◽  
Lewis Acid ◽  
Catalyst Design ◽  
Added Value ◽  
Present Review ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts ◽  
Starting Point ◽  
Acid Catalyzed ◽  
Multifunctional Catalyst

One of the most trending topics in catalysis recently is the use of renewable sources and/or non-waste technologies to generate products with high added value. That is why, the present review resumes the advances in catalyst design for biomass chemical valorization. The variety of involved reactions and functionality of obtained molecules requires the use of multifunctional catalyst able to increase the efficiency and selectivity of the selected process. The use of glucose as platform molecule is proposed here and its use as starting point for biobased plastics production is revised with special attention paid to the proposed tandem Bronsted/Lewis acid catalysts.

scholarly journals A Combined Catalyst of Pt Nanoparticles and TiO 2 with Water‐Tolerant Lewis Acid Sites for One‐Pot Conversion of Glycerol to Lactic Acid

ChemCatChem ◽  
2016 ◽  
Vol 8 (6) ◽  
pp. 1094-1099 ◽  
Author(s):  
Tasuku Komanoya ◽  
Ayaka Suzuki ◽  
Kiyotaka Nakajima ◽  
Masaaki Kitano ◽  
Keigo Kamata ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lewis Acid ◽  
Pt Nanoparticles ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
One Pot

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.

The Role of Brønsted and Water‐Tolerant Lewis Acid Sites in the Cascade Aqueous‐Phase Reaction of Triose to Lactic Acid

ChemCatChem ◽  
2019 ◽  
Vol 11 (13) ◽  
pp. 3054-3063 ◽  
Author(s):  
Kryslaine M. A. Santos ◽  
Elise M. Albuquerque ◽  
Giada Innocenti ◽  
Luiz E. P. Borges ◽  
Carsten Sievers ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Aqueous Phase ◽  
Lewis Acid ◽  
Acid Sites ◽  
Phase Reaction ◽  
Lewis Acid Sites

scholarly journals Glucose Conversion into 5-Hydroxymethylfurfural over Niobium Oxides Supported on Natural Rubber-Derived Carbon/Silica Nanocomposite

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 887
Author(s):  
Rujeeluk Khumho ◽  
Satit Yousatit ◽  
Chawalit Ngamcharussrivichai
Keyword(s):  
Natural Rubber ◽  
Lewis Acid ◽  
Value Added ◽  
Acid Sites ◽  
Superior Performance ◽  
Lewis Acidity ◽  
Lewis Acid Sites ◽  
Niobium Oxides ◽  
Silica Nanocomposite ◽  
Loading Amount

5-Hydroxymethylfurfural (HMF) is one of the most important lignocellulosic biomass-derived platform molecules for production of renewable fuel additives, liquid hydrocarbon fuels, and value-added chemicals. The present work developed niobium oxides (Nb2O5) supported on mesoporous carbon/silica nanocomposite (MCS), as novel solid base catalyst for synthesis of HMF via one-pot glucose conversion in a biphasic solvent. The MCS material was prepared via carbonization using natural rubber dispersed in hexagonal mesoporous silica (HMS) as a precursor. The Nb2O5 supported on MCS (Nb/MCS) catalyst with an niobium (Nb) loading amount of 10 wt.% (10-Nb/MCS) was characterized by high dispersion, and so tiny crystallites of Nb2O5, on the MCS surface, good textural properties, and the presence of Bronsted and Lewis acid sites with weak-to-medium strength. By varying the Nb loading amount, the crystallite size of Nb2O5 and molar ratio of Bronsted/Lewis acidity could be tuned. When compared to the pure silica HMS-supported Nb catalyst, the Nb/MCS material showed a superior glucose conversion and HMF yield. The highest HMF yield of 57.5% was achieved at 93.2% glucose conversion when using 10-Nb/MCS as catalyst (5 wt.% loading with respect to the mass of glucose) at 190 °C for 1 h. Furthermore, 10-Nb/MCS had excellent catalytic stability, being reused in the reaction for five consecutive cycles during which both the glucose conversion and HMF yield were insignificantly changed. Its superior performance was ascribed to the suitable ratio of Brønsted/Lewis acid sites, and the hydrophobic properties generated from the carbon moieties dispersed in the MCS nanocomposite.

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