Glycerol Valorization as Biofuel Additives by Employing a Carbon-Based Solid Acid Catalyst Derived from Glycerol

A two-step process was developed for the preparation of triacetylglycerol (TAG), a biofuel additive employing a solid acid catalyst derived from glycerol. The first step involves esterification of glycerol with acetic acid (1:4 mol) at 115 °C for 1 h in the presence of catalyst (5 wt %) to obtain 100% conversion of glycerol with 22, 67, and 11% MAG, DAG, and TAG, respectively. In the second step, the esterified product mixture after removal of excess acetic acid and moisture was acetylated with acetic anhydride (1 mol with respect to glycerol) at 115 °C for 30 min to obtain 100% TAG. The recovered catalyst was reused for five cycles without any significant loss of its initial activity. The protocol is cost-effective due to the use of highly stable and recyclable SO₃H-carbon catalyst for the production of TAG with minimum moles of acetic acid and acetic anhydride in shorter reaction time

A mild and efficient synthesis of bis(indolyl)methane derivatives catalyzed by monoammonium salt of 12-tungstophosphoric acid

1731-1737A simple, highly rapid and efficient electophilic substitution reaction of indole with various aromatic aldehydes has been carried out using 5 wt% of monoammonium salt of 12-tungstophosphoric acid [(NH4)H2PW12O40] as a solid acid catalyst in acetonitrile to afford the corresponding bis(indolyl)methanes in excellent yields (84-95%) at room temperature. The heteropolyacid-based catalyst has the advantages of simple workup procedure, water insolubility with good activity and high yielding reaction for the synthesis of bis(indolyl)methane derivatives

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Not AvailableThe possibility of using lysolecithin from rice bran oil (LL) as a lipotropic agent was explored in the diet of broiler chickens. The LL was evaluated at 0.1 and 0.5% levels in diet vis-à-vis choline chloride, betaine or a commercial LL (0.1% of any) in broiler chickens (270) from 0 to 35 d of age. The diets were isonitrogenous and isocaloric. Body weight at 35 d was significantly higher in the group fed betaine, while LL showed no effect on growth, feed consumption, serum cholesterol concentration, slaughter variables and liver protein, and fat contents in comparison to control. The serum concentration of triglycerides at 35 d of age, however, decreased significantly with betaine, commercial LL and rice bran oil LL at both the levels. It is concluded that rice bran oil LL at dietary levels upto 0.5% showed no adverse effect on performance and reduced serum triglycerides content in broiler chickens, while betaine improved body weight.Not Availabl

Not Available

Not AvailableThe possibility of using lysolecithin from rice bran oil (LL) as a lipotropic agent was explored in the diet of broiler chickens. The LL was evaluated at 0.1 and 0.5% levels in diet vis-à-vis choline chloride, betaine or a commercial LL (0.1% of any) in broiler chickens (270) from 0 to 35 d of age. The diets were isonitrogenous and isocaloric. Body weight at 35 d was significantly higher in the group fed betaine, while LL showed no effect on growth, feed consumption, serum cholesterol concentration, slaughter variables and liver protein, and fat contents in comparison to control. The serum concentration of triglycerides at 35 d of age, however, decreased significantly with betaine, commercial LL and rice bran oil LL at both the levels. It is concluded that rice bran oil LL at dietary levels upto 0.5% showed no adverse effect on performance and reduced serum triglycerides content in broiler chickens, while betaine improved body weight.Not Availabl

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Not AvailableThe possibility of using lysolecithin from rice bran oil (LL) in the diet of broiler chickens was explored. Lysolecithin was included in diet at graded levels (0, 0.05, 0.1, 0.2, 0.4, 0.8, 1.6 and 3.2 % in diet) and fed to a total of 640 broiler chickens from 0 to 35 d of age. The diets were isonitrogenous and isocaloric. Body weight was higher in the group fed the highest level (3.2 %) of LL. Feed intake was significantly (p 1.6 % the LL improved the body weight, feed conversion efficiency and fat digestibility in broiler chickensNot Availabl

Assessment and comparison of the properties of biodiesel synthesized from three different types of wet microalgal biomass

In recent years, microalgae-based carbon-neutral biofuels (i.e., biodiesel) have gained considerable interest due to high growth rate and higher lipid productivity of microalgae during the whole year, delivering continuous biomass production as compared to vegetable-based feedstocks. Therefore, biodiesel was synthesized from three different microalgal species, namely Tetraselmis sp. (Chlorophyta) and Nannochloropsis oculata and Phaeodactylum tricornutum (Heterokontophyta), and the fuel properties of the biodiesel were analytically determined, unlike most studies which rely on estimates based on the lipid profile of the microalgae. These include density, kinematic viscosity, total and free glycerol, and high heating value (HHV), while cetane number (CN) and cold filter plugging point (CFPP) were estimated based on the fatty acid methyl ester profile of the biodiesel samples instead of the lipid profile of the microalgae. Most biodiesel properties abide by the ASTM D6751 and the EN 14214 specifications, although none of the biodiesel samples met the minimum CN or the maximum content of polyunsaturated fatty acids with a parts per thousand yen4 double bonds as required by the EN 14214 reference value. On the other hand, bomb calorimetric experiments revealed that the heat of combustion of all samples was on the upper limit expected for biodiesel fuels, actually being close to that of petrodiesel. Post-production processing may overcome the aforementioned limitations, enabling the production of biodiesel with high HHV obtained from lipids present in these microalgae