Glycerol Conversion Catalyzed by Carbons Prepared from Agroindustrial Wastes

2013 ◽  
Vol 52 (8) ◽  
pp. 2832-2839 ◽  
Author(s):  
Maraisa Gonçalves ◽  
Victor C. Souza ◽  
Thalita S. Galhardo ◽  
Michelle Mantovani ◽  
Flávia C. A. Figueiredo ◽  
...  
Keyword(s):  
Glycerol Conversion ◽  
Agroindustrial Wastes

DESIGN AND PERFORMANCE EVALUATION OF A PLANT FOR GLYCEROL CONVERSION TO ACROLEIN

2015 ◽  
Vol 14 (3) ◽  
pp. 509-517 ◽  
Author(s):  
Ionut Banu ◽  
Georgiana Guta ◽  
Costin Sorin Bildea ◽  
Grigore Bozga
Keyword(s):  
Performance Evaluation ◽  
Glycerol Conversion ◽  
And Performance

scholarly journals Glycerol Hydrogenolysis with In Situ Hydrogen Produced via Methanol Steam Reforming: The Promoting Effect of Pd on a Cu/ZnO/Al2O3 Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 110
Author(s):  
Yuanqing Liu ◽  
Chau T. Q. Mai ◽  
Flora T. T. Ng
Keyword(s):  
Steam Reforming ◽  
Catalyst Activity ◽  
Promoting Effect ◽  
Glycerol Conversion ◽  
Glycerol Hydrogenolysis ◽  
Glycerol Dehydration ◽  
Effect Of Pd ◽  
Al2o3 Catalyst ◽  
Reaction Equilibrium

The glycerol hydrogenolysis to produce 1,2-propanediol without using externally supplied hydrogen was investigated using methanol present in crude glycerol to provide in situ hydrogen via its steam reforming reaction. This paper focuses on the promoting effect of Pd on the reactivity of a Cu/Zn/Al2O3 catalyst. Adding 2 wt% Pd onto a Cu/ZnO/Al2O3 catalyst significantly improved the selectivity to 1,2-propanediol from 63.0% to 82.4% and the glycerol conversion from 70.2% to 99.4%. This enhancement on the catalytic activity by Pd is mainly due to the improved hydrogenation of acetol, which is the intermediate formed during the glycerol dehydration. The rapid hydrogenation of acetol can shift the reaction equilibrium of glycerol dehydration forward resulting in a higher glycerol conversion. The improved reducibility of the catalyst by Pd allows the catalyst to be reduced in situ during the reaction preventing any loss of catalyst activity due to any potential oxidation of the catalyst. The catalyst was slightly deactivated when it was firstly recycled resulting in a 5.4% loss of glycerol conversion due to the aggregation of Cu and the deactivation became less noticeable upon further recycling.

Enhance glycerol conversion through co-etherification with isobutene and tert-butanol

2021 ◽  
Vol 218 ◽  
pp. 106838
Author(s):  
Jingjun Liu ◽  
Yuying Jiang ◽  
Peng Zhang ◽  
Bolun Yang
Keyword(s):  
Glycerol Conversion ◽  
Tert Butanol

Preparation of Ni Loaded on Zeolite and its Application for Conversion of Glycerol to Hydrogen

2013 ◽  
Vol 845 ◽  
pp. 457-461
Author(s):  
Ramli Mat ◽  
Junaidah Buhari ◽  
Mahadhir Mohamed ◽  
Anwar Johari ◽  
Tuan Amran Tuan Abdullah ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Hydrogen Gas ◽  
Biodiesel Production ◽  
Esterification Reaction ◽  
Glycerol Conversion ◽  
Reactor Temperature

Glycerol is the main by-product of biodiesel production and during the trans-esterification reaction, about 10 wt % of glycerol is produced. In this study, different amount of Ni was loaded on HZSM-5 and tested for the conversion of glycerol to hydrogen. The studies were also conducted at different reactor temperature of 450, 500, 550, 600 and 650°C respectively. The structural characterization of the catalyst was carried out using the XRD. It was found that, the addition of 15 wt % of nickel loaded on HZSM-5 shows the highest glycerol conversion of 98.54%. In addition, it produces the highest yield of hydrogen gas operated at reactor temperature of 600°C.

Rhenium-promoted Pt/WO3/ZrO2: an efficient catalyst for aqueous glycerol hydrogenolysis under reduced H2 pressure

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86663-86672 ◽  
Author(s):  
Qing Tong ◽  
Anyi Zong ◽  
Wei Gong ◽  
Lei Yu ◽  
Yining Fan
Keyword(s):  
Catalyst Surface ◽  
Surface Acidity ◽  
Efficient Catalyst ◽  
Glycerol Conversion ◽  
Glycerol Hydrogenolysis

Re improved the dispersion of Pt in Pt/WO3/ZrO2 and enhanced the catalyst surface acidity. Pt–Re/WO3/ZrO2 afforded glycerol conversion >99% and C3 alcohol selectivity >95%. The reactions were performed under reduced H2 pressure.

scholarly journals Contemporaneous Production of Amylase and Protease through CCD Response Surface Methodology by Newly Isolated Bacillus megaterium Strain B69

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Rajshree Saxena ◽  
Rajni Singh
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Bacillus Megaterium ◽  
High Accuracy ◽  
Mass Scale ◽  
World Population ◽  
Oilseed Cake ◽  
Basal Media ◽  
Green Chemicals ◽  
Agroindustrial Wastes

The enormous increase in world population has resulted in generation of million tons of agricultural wastes. Biotechnological process for production of green chemicals, namely, enzymes, provides the best utilization of these otherwise unutilized wastes. The present study elaborates concomitant production of protease and amylase in solid state fermentation (SSF) by a newly isolated Bacillus megaterium B69, using agroindustrial wastes. Two-level statistical model employing Plackett-Burman and response surface methodology was designed for optimization of various physicochemical conditions affecting the production of two enzymes concomitantly. The studies revealed that the new strain concomitantly produced 1242 U/g of protease and 1666.6 U/g of amylase by best utilizing mustard oilseed cake as the substrate at 20% substrate concentration and 45% moisture content after 84 h of incubation. An increase of 2.95- and 2.04-fold from basal media was observed in protease and amylase production, respectively. ANOVA of both the design models showed high accuracy of the polynomial model with significant similarities between the predicted and the observed results. The model stood accurate at the bench level validation, suggesting that the design model could be used for multienzyme production at mass scale.

Development of biodegradable pots from different agroindustrial wastes and byproducts

2021 ◽  
Vol 30 ◽  
pp. e00338
Author(s):  
Rocío A. Fuentes ◽  
Jazmín A. Berthe ◽  
Silvia E. Barbosa ◽  
Luciana A. Castillo
Keyword(s):  
Agroindustrial Wastes

scholarly journals Glycerol Enhances the Antifungal Activity of Dairy Propionibacteria

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Helena Lind ◽  
Anders Broberg ◽  
Karin Jacobsson ◽  
Hans Jonsson ◽  
Johan Schnürer
Keyword(s):  
Propionic Acid ◽  
Starter Cultures ◽  
Dual Culture ◽  
Penicillium Roqueforti ◽  
Glycerol Conversion ◽  
Antifungal Effect ◽  
Dual Culture Assay ◽  
Penicillium Commune ◽  
Dairy Propionibacteria ◽  
Type Strains

Dairy propionibacteria are widely used in starter cultures for Swiss type cheese. These bacteria can ferment glucose, lactic acid, and glycerol into propionic acid, acetic acid, and carbon dioxide. This research examined the antifungal effect of dairy propionibacteria when glycerol was used as carbon source for bacterial growth. Five type strains of propionibacteria were tested against the yeastRhodotorula mucilaginosaand the moldsPenicillium communeandPenicillium roqueforti. The conversion of13C glycerol byPropionibacterium jenseniiwas followed with nuclear magnetic resonance. In a dual culture assay, the degree of inhibition of the molds was strongly enhanced by an increase in glycerol concentrations, while the yeast was less affected. In broth cultures, decreased pH in glycerol medium was probably responsible for the complete inhibition of the indicator fungi. NMR spectra of the glycerol conversion confirmed that propionic acid was the dominant metabolite. Based on the results obtained, the increased antifungal effect seen by glycerol addition to cultures of propionibacteria is due to the production of propionic acid and pH reduction of the medium.

Sign in / Sign up

Export Citation Format

Share Document