The Experts below are selected from a list of 2919 Experts worldwide ranked by ideXlab platform
Shuguang Deng - One of the best experts on this subject based on the ideXlab platform.
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microwave assisted catalytic transesterification of Camelina Sativa oil
Energy & Fuels, 2010Co-Authors: Prafulla D Patil, Veera Gnaneswar Gude, Lucy Mar Camacho, Shuguang DengAbstract:Catalytic conversion of Camelina Sativa oil to biodiesel through both conventional heating and microwave radiation was investigated. Three different types of catalysts: homogeneous catalysts (NaOH and KOH), heterogeneous metal oxide catalysts (BaO and SrO), and sol−gel derived catalysts (BaCl2/AA and SrCl2/AA) were evaluated for their efficacy in biodiesel production. The following conditions were obtained for the catalysts based on the maximum biodiesel yield: potassium hydroxide/methanol to oil ratio of 1:9, catalyst concentration of 1% (w/w), and reaction time of 60 s; sodium hydroxide/methanol to oil ratio of 1:9, catalyst concentration of 0.5 wt %, and reaction time of 60 s; barium oxide/methanol to oil ratio of 1:9, catalyst concentration of 1.5% (w/w), and reaction time of 4 min; strontium oxide/methanol to oil ratio of 1:9, catalyst concentration of 2 wt %, and reaction time of 4 min. In the case of sol−gel derived catalysts, different catalyst loading rates in the range of 1−10 mmol/g were evalua...
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biodiesel production from jatropha curcas waste cooking and Camelina Sativa oils
Industrial & Engineering Chemistry Research, 2009Co-Authors: Prafulla D Patil, Veera Gnaneswar Gude, Shuguang DengAbstract:Process parameter evaluation and catalyst performance study was conducted for biodiesel production using jatropha curcas, waste cooking, and Camelina Sativa oils. Conversion of triglycerides to methyl esters involves esterification and/or transesterification, depending on the nature of the feedstock. A two-step transesterification process (acid esterification followed by alkali transesterification) was employed to produce biodiesel from high free fatty acids (FFA) in jatropha curcas and waste cooking oils, and a single-step transesterifcation process (alkali transesterifcation) was used for Camelina Sativa oil conversion. Catalyst selection is vital in transesterification process because it determines biodiesel yield and cost. Transesterification of jatropha curcas and waste cooking oil was optimized by using H2SO4 and ferric sulfate catalysts in the acid esterification step and a KOH catalyst in the alkali transesterification, respectively. Heterogeneous metal oxide catalysts including BaO, SrO, MgO, and...
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transesterification of Camelina Sativa oil using heterogeneous metal oxide catalysts
Energy & Fuels, 2009Co-Authors: Prafulla D Patil, Shuguang DengAbstract:Camelina Sativa oil provides a reliable solution for biodiesel production by providing a sustainable, low-input biofuel feedstock option in some climates. In the present study, optimization of the transesterification of Camelina Sativa oil using different heterogeneous metal oxide catalysts, i.e., BaO, SrO, MgO, and CaO, was evaluated. The results of comparative experiments showed that the most effective catalyst was 1 wt % BaO, which showed an >80% yield of Camelina to biodiesel conversion in 3 h at 100 °C. The relative order of the effectiveness of the catalysts was BaO > SrO > CaO > MgO. These catalysts were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer−Emmett−Teller (BET) to obtain their physical and chemical properties. The important variables affecting the methyl ester yield during the transesterification reaction are the molar ratio of alcohol/oil, catalyst amount, and reaction temperature. The fuel properties of biodiesel produced were compared to Ame...
Ivo Feussner - One of the best experts on this subject based on the ideXlab platform.
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synthesis of oleyl oleate wax esters in arabidopsis thaliana and Camelina Sativa seed oil
Plant Biotechnology Journal, 2016Co-Authors: Tim Iven, Mareike Heilmann, Ellen Hornung, Ivo FeussnerAbstract:Summary Seed oil composed of wax esters with long-chain monoenoic acyl moieties represents a high-value commodity for industry. Such plant-derived sperm oil-like liquid wax esters are biodegradable and can have excellent properties for lubrication. In addition, wax ester oil may represent a superior substrate for biodiesel production. In this study, we demonstrate that the low-input oil seed crop Camelina Sativa can serve as a biotechnological platform for environmentally benign wax ester production. Two biosynthetic steps catalysed by a fatty alcohol-forming acyl-CoA reductase (FAR) and a wax ester synthase (WS) are sufficient to achieve wax ester accumulation from acyl-CoA substrates. To produce plant-derived sperm oil-like liquid wax esters, the WS from Mus musculus (MmWS) or Simmondsia chinensis (ScWS) were expressed in combination with the FAR from Mus musculus (MmFAR1) or Marinobacter aquaeolei (MaFAR) in seeds of Arabidopsis thaliana and Camelina Sativa. The three analysed enzyme combinations Oleo3:mCherry:MmFAR1∆c/Oleo3:EYFP:MmWS, Oleo3:mCherry:MmFAR1∆c/ScWS and MaFAR/ScWS showed differences in the wax ester molecular species profiles and overall biosynthetic performance. By expressing MaFAR/ScWS in Arabidopsis or Camelina up to 59% or 21% of the seed oil TAGs were replaced by wax esters, respectively. This combination also yielded wax ester molecular species with highest content of monounsaturated acyl moieties. Expression of the enzyme combinations in the Arabidopsis fae1 fad2 mutant background high in oleic acid resulted in wax ester accumulation enriched in oleyl oleate (18:1/18:1 > 60%), suggesting that similar values may be obtained with a Camelina high oleic acid line.
Chaofu Lu - One of the best experts on this subject based on the ideXlab platform.
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Mapping quantitative trait loci for seed traits in Camelina Sativa
Theoretical and Applied Genetics, 2019Co-Authors: Kevin King, Jinling Kang, Huang Li, Chaofu LuAbstract:Key message Genetic dissection of oil content and seed size in Camelina Sativa was conducted by QTL mapping using a SNP-based linkage map and a recombinant inbred population. Abstract Camelina ( Camelina Sativa L. Crantz) is an oilseed crop that has great potential to provide sustainable feedstock for biofuel production and to improve dryland agriculture. A major breeding objective for Camelina is to increase seed size and oil content. Understanding the genetics behind variations of seed size and associated traits such as oil content would help breeders develop varieties of increased oil yield that are more robust, easier to plant and harvest, and better for oil processing. In this study, we developed a recombinant inbred population derived from the two Camelina accessions, Suneson and Pryzeth, with contrasting traits, especially seed size and oil content. Using 189 lines, a genetic map was constructed containing 2376 single nucleotide polymorphism markers spanning 2034.6 cM of 20 linkage groups with an average density of 1.5 cM per locus. Field trials were conducted for 2 years (2017 and 2018) in two environments (dryland and irrigated) in Bozeman, Montana. The results revealed important correlations of seed size with other associated traits such as oil content, pod size and seed number per pod. Significant QTLs were also discovered for these traits. The results of this study are the first step to isolate genes controlling seed development and oil accumulation and to develop advanced varieties of Camelina better adapted to modern agriculture by marker-assisted breeding.
Prafulla D Patil - One of the best experts on this subject based on the ideXlab platform.
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microwave assisted catalytic transesterification of Camelina Sativa oil
Energy & Fuels, 2010Co-Authors: Prafulla D Patil, Veera Gnaneswar Gude, Lucy Mar Camacho, Shuguang DengAbstract:Catalytic conversion of Camelina Sativa oil to biodiesel through both conventional heating and microwave radiation was investigated. Three different types of catalysts: homogeneous catalysts (NaOH and KOH), heterogeneous metal oxide catalysts (BaO and SrO), and sol−gel derived catalysts (BaCl2/AA and SrCl2/AA) were evaluated for their efficacy in biodiesel production. The following conditions were obtained for the catalysts based on the maximum biodiesel yield: potassium hydroxide/methanol to oil ratio of 1:9, catalyst concentration of 1% (w/w), and reaction time of 60 s; sodium hydroxide/methanol to oil ratio of 1:9, catalyst concentration of 0.5 wt %, and reaction time of 60 s; barium oxide/methanol to oil ratio of 1:9, catalyst concentration of 1.5% (w/w), and reaction time of 4 min; strontium oxide/methanol to oil ratio of 1:9, catalyst concentration of 2 wt %, and reaction time of 4 min. In the case of sol−gel derived catalysts, different catalyst loading rates in the range of 1−10 mmol/g were evalua...
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biodiesel production from jatropha curcas waste cooking and Camelina Sativa oils
Industrial & Engineering Chemistry Research, 2009Co-Authors: Prafulla D Patil, Veera Gnaneswar Gude, Shuguang DengAbstract:Process parameter evaluation and catalyst performance study was conducted for biodiesel production using jatropha curcas, waste cooking, and Camelina Sativa oils. Conversion of triglycerides to methyl esters involves esterification and/or transesterification, depending on the nature of the feedstock. A two-step transesterification process (acid esterification followed by alkali transesterification) was employed to produce biodiesel from high free fatty acids (FFA) in jatropha curcas and waste cooking oils, and a single-step transesterifcation process (alkali transesterifcation) was used for Camelina Sativa oil conversion. Catalyst selection is vital in transesterification process because it determines biodiesel yield and cost. Transesterification of jatropha curcas and waste cooking oil was optimized by using H2SO4 and ferric sulfate catalysts in the acid esterification step and a KOH catalyst in the alkali transesterification, respectively. Heterogeneous metal oxide catalysts including BaO, SrO, MgO, and...
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transesterification of Camelina Sativa oil using heterogeneous metal oxide catalysts
Energy & Fuels, 2009Co-Authors: Prafulla D Patil, Shuguang DengAbstract:Camelina Sativa oil provides a reliable solution for biodiesel production by providing a sustainable, low-input biofuel feedstock option in some climates. In the present study, optimization of the transesterification of Camelina Sativa oil using different heterogeneous metal oxide catalysts, i.e., BaO, SrO, MgO, and CaO, was evaluated. The results of comparative experiments showed that the most effective catalyst was 1 wt % BaO, which showed an >80% yield of Camelina to biodiesel conversion in 3 h at 100 °C. The relative order of the effectiveness of the catalysts was BaO > SrO > CaO > MgO. These catalysts were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer−Emmett−Teller (BET) to obtain their physical and chemical properties. The important variables affecting the methyl ester yield during the transesterification reaction are the molar ratio of alcohol/oil, catalyst amount, and reaction temperature. The fuel properties of biodiesel produced were compared to Ame...
Tim Iven - One of the best experts on this subject based on the ideXlab platform.
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synthesis of oleyl oleate wax esters in arabidopsis thaliana and Camelina Sativa seed oil
Plant Biotechnology Journal, 2016Co-Authors: Tim Iven, Mareike Heilmann, Ellen Hornung, Ivo FeussnerAbstract:Summary Seed oil composed of wax esters with long-chain monoenoic acyl moieties represents a high-value commodity for industry. Such plant-derived sperm oil-like liquid wax esters are biodegradable and can have excellent properties for lubrication. In addition, wax ester oil may represent a superior substrate for biodiesel production. In this study, we demonstrate that the low-input oil seed crop Camelina Sativa can serve as a biotechnological platform for environmentally benign wax ester production. Two biosynthetic steps catalysed by a fatty alcohol-forming acyl-CoA reductase (FAR) and a wax ester synthase (WS) are sufficient to achieve wax ester accumulation from acyl-CoA substrates. To produce plant-derived sperm oil-like liquid wax esters, the WS from Mus musculus (MmWS) or Simmondsia chinensis (ScWS) were expressed in combination with the FAR from Mus musculus (MmFAR1) or Marinobacter aquaeolei (MaFAR) in seeds of Arabidopsis thaliana and Camelina Sativa. The three analysed enzyme combinations Oleo3:mCherry:MmFAR1∆c/Oleo3:EYFP:MmWS, Oleo3:mCherry:MmFAR1∆c/ScWS and MaFAR/ScWS showed differences in the wax ester molecular species profiles and overall biosynthetic performance. By expressing MaFAR/ScWS in Arabidopsis or Camelina up to 59% or 21% of the seed oil TAGs were replaced by wax esters, respectively. This combination also yielded wax ester molecular species with highest content of monounsaturated acyl moieties. Expression of the enzyme combinations in the Arabidopsis fae1 fad2 mutant background high in oleic acid resulted in wax ester accumulation enriched in oleyl oleate (18:1/18:1 > 60%), suggesting that similar values may be obtained with a Camelina high oleic acid line.
