Hydrothermal conversion of macroalgae-derived alginate to lactic acid catalyzed by metal oxides

2016 ◽  
Vol 6 (4) ◽  
pp. 1146-1156 ◽  
Author(s):  
Wonjin Jeon ◽  
Chunghyeon Ban ◽  
Geonu Park ◽  
Hee Chul Woo ◽  
Do Heui Kim
Keyword(s):  
Lactic Acid ◽  
Metal Oxides ◽  
Hydrothermal Reaction ◽  
Biomass Feedstock ◽  
Hydrothermal Conversion ◽  
Renewable Biomass ◽  
Acid Catalyzed

Macroalgae-derived alginate was used as a renewable biomass feedstock for producing lactic acid in a hydrothermal reaction catalyzed by metal oxides.

scholarly journals Hydrothermal conversion of high-concentrated glycerol to lactic acid catalyzed by bimetallic CuAux (x = 0.01–0.04) nanoparticles and their reaction kinetics

RSC Advances ◽  
2017 ◽  
Vol 7 (49) ◽  
pp. 30725-30739 ◽  
Author(s):  
Lingqin Shen ◽  
Xin Zhou ◽  
Aili Wang ◽  
Hengbo Yin ◽  
Haixu Yin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Lactic Acid ◽  
Reaction Kinetics ◽  
Hydrothermal Conversion ◽  
Acid Catalyzed

Bimetallic CuAux nanoparticles with alloy trend effectively catalyzed high-concentrated glycerol to lactic acid in a NaOH aqueous solution.

Hydrothermal conversion of glycerol to lactic acid catalyzed by Cu/hydroxyapatite, Cu/MgO, and Cu/ZrO2 and reaction kinetics

2016 ◽  
Vol 288 ◽  
pp. 332-343 ◽  
Author(s):  
Haixu Yin ◽  
Changhua Zhang ◽  
Hengbo Yin ◽  
Dezhi Gao ◽  
Lingqin Shen ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Reaction Kinetics ◽  
Hydrothermal Conversion ◽  
Acid Catalyzed

γ-Valerolactone-Introduced Controlled-Isomerization of Glucose for Lactic Acid Production over Sn-Beta Catalyst

2021 ◽  
Author(s):  
Xinpeng Zhao ◽  
Zhimin Zhou ◽  
hu luo ◽  
Yanfei Zhang ◽  
Wang Liu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Lactic Acid ◽  
Dft Calculations ◽  
Acid Production ◽  
Density Functional ◽  
Lactic Acid Production ◽  
Hydrothermal Conversion ◽  
Functional Theory ◽  
Environment Friendly

Combined experiments and density functional theory (DFT) calculations provided insights into the role of the environment-friendly γ-valerolactone (GVL) as a solvent in the hydrothermal conversion of glucose into lactic acid...

scholarly journals Development of Four Unit Processes for Biobased PLA Manufacturing

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Chae Hwan Hong ◽  
Si Hwan Kim ◽  
Ji-Yeon Seo ◽  
Do Suck Han
Keyword(s):  
Lactic Acid ◽  
Ring Opening ◽  
Lactic Acid Production ◽  
Scale Up ◽  
Catalyst System ◽  
Ring Opening Polymerization ◽  
Acid Fermentation ◽  
Manufacturing Method ◽  
Renewable Biomass ◽  
Microbial Productivity

Polylactide (PLA), which is one of the most important biocompatible polyesters that are derived from annually renewable biomass such as corn and sugar beets, has attracted much attention for automotive parts application. The manufacturing method of PLA is the ring-opening polymerization of the dimeric cyclic ester of lactic acid, lactide. For the stereocomplex PLA, we developed the four unit processes, fermentation, separation, lactide conversion, and polymerization. Fermentation of sugars to D-lactic acid is little studied, and its microbial productivity is not well known. Therefore, we investigated D-lactic acid fermentation with a view to obtaining the strains capable of producing D-lactic acid, and we got a maximum lactic acid production 60 g/L. Lactide is prepared by a two-step process: first, the lactic acid is converted into oligo(lactic acid) by a polycondensation reaction; second, the oligo(lactic acid) is thermally depolymerized to form the cyclic lactide via an unzipping mechanism. Through catalyst screening test for polycondensation and depolymerization reactions, we got a new method which shortens the whole reaction time 50% the level of the conventional method. Poly(L-lactide) was obtained from the ring-opening polymerization of L-lactide. We investigated various catalysts and polymerization conditions. Finally, we got the best catalyst system and the scale-up technology.

The conversion of glycerol to lactic acid catalyzed by ZrO2-supported CuO catalysts

2016 ◽  
Vol 283 ◽  
pp. 759-767 ◽  
Author(s):  
Gao-Yuan Yang ◽  
Yi-Hu Ke ◽  
Hui-Fang Ren ◽  
Chun-Ling Liu ◽  
Rong-Zhen Yang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acid Catalyzed

Chemicals from biomass: synthesis of lactic acid by alkaline hydrothermal conversion of sorbitol

2011 ◽  
Vol 86 (6) ◽  
pp. 867-874 ◽  
Author(s):  
Camilo A. Ramírez-López ◽  
José R. Ochoa-Gómez ◽  
Silvia Gil-Río ◽  
Olga Gómez-Jiménez-Aberasturi ◽  
Jesús Torrecilla-Soria
Keyword(s):  
Lactic Acid ◽  
Hydrothermal Conversion

Conversion of Glycerol to Lactic Acid Catalyzed by Different-Sized Cu2O Nanoparticles in NaOH Aqueous Solution

2017 ◽  
Vol 17 (1) ◽  
pp. 780-787 ◽  
Author(s):  
Lingqin Shen ◽  
Haixu Yin ◽  
Hengbo Yin ◽  
Si Liu ◽  
Aili Wang
Keyword(s):  
Aqueous Solution ◽  
Lactic Acid ◽  
Cu2o Nanoparticles ◽  
Acid Catalyzed

Atomic Layer Deposition for Improved Stability of Catalysts for the Conversion of Biomass to Chemicals and Fuels

2011 ◽  
Vol 1366 ◽  
Author(s):  
Monika K. Wiedmann ◽  
Yomaira J. Pagan-Torres ◽  
Mark H. Tucker ◽  
James A. Dumesic ◽  
T. F. Kuech
Keyword(s):  
Atomic Layer Deposition ◽  
Metal Oxides ◽  
Rate Constant ◽  
Flow Reactor ◽  
Atomic Layer ◽  
Deactivation Rate ◽  
Layer Deposition ◽  
Improved Stability ◽  
Deactivation Rate Constant ◽  
Acid Catalyzed

ABSTRACTAtomic layer deposition (ALD) has been used to coat SBA-15 and functionalized SBA-15 with various metal oxides. Use of SBA-15 coated with 4-10 ALD cycles of titania, alumina, niobia, or zirconia in the acid-catalyzed dehydration of fructose to 5-hydroxymethylfurfural (HMF) resulted in 24-57% conversion, with 0-22% selectivity, at 130 °C with 2 wt % fructose in 4:1 THF:H2O. Propylsulfonic acid functionalized SBA-15 (SBA-15-PrSO3H) had a 25% conversion and 48% selectivity for HMF under the same conditions. SBA-15-PrSO3H was also coated with 2 ALD cycles of titania followed by 8 ALD cycles silica. The deactivation rate constant for SBA-15-PrSO3H was 2.7 x 10-2 h-1 for the dehydration of fructose to HMF in a flow reactor at 130 °C with a feed of 2 wt % fructose in 4:1 THF:H2O. In comparison, the deactivation rate constant for the ALD coated SBA-15-PrSO3H-ALD was 7.9 x 10-3 h-1.

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