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Fraction (chemistry)

About: Fraction (chemistry) is a research topic. Over the lifetime, 10574 publications have been published within this topic receiving 91584 citations. The topic is also known as: part of a whole & distillation fraction.


Papers
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Journal ArticleDOI
04 Apr 1997-Science
TL;DR: The urban atmospheric, anthropogenic hydrocarbon profile is approximated well by evaporated whole gasoline, and thus these results suggest that it is possible to model atmospheric secondary organic aerosol formation.
Abstract: A series of sunlight-irradiated, smog-chamber experiments confirmed that the atmospheric organic aerosol formation potential of whole gasoline vapor can be accounted for solely in terms of the aromatic fraction of the fuel The total amount of secondary organic aerosol produced from the atmospheric oxidation of whole gasoline vapor can be represented as the sum of the contributions of the individual aromatic molecular constituents of the fuel The urban atmospheric, anthropogenic hydrocarbon profile is approximated well by evaporated whole gasoline, and thus these results suggest that it is possible to model atmospheric secondary organic aerosol formation

520 citations

Journal ArticleDOI
TL;DR: In this article, turmeric oleoresin was extracted from the mother liquor using hexane at 60 degrees C, and the hexane extract was separated into three fractions using silica gel column chromatography.
Abstract: Curcumin, the yellow color pigment of turmeric, is produced industrially from turmeric oleoresin. The mother liquor after isolation of curcumin from oleoresin contains approximately 40% oil. The oil was extracted from the mother liquor using hexane at 60 degrees C, and the hexane extract was separated into three fractions using silica gel column chromatography. These fractions were tested for antibacterial activity by pour plate method against Bacillus cereus, Bacillus coagulans, Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. Fraction II eluted with 5% ethyl acetate in hexane was found to be most active fraction. The turmeric oil, fraction I, and fraction II were analyzed by GC and GC-MS. ar-Turmerone, turmerone, and curlone were found to be the major compounds present in these fractions along with other oxygenated compounds.

509 citations

Journal ArticleDOI
TL;DR: In this paper, a two-stage process is proposed to generate bio-oil, followed by catalytic steam reforming of the biooil, or a fraction thereof, to produce hydrogen.
Abstract: Biomass, a product of photosynthesis, is a renewable resource that can be used for sustainable production of hydrogen. We propose an approach that combines production of hydrogen with valuable coproducts and shows promising economics. The concept is based on a two-stage process: fast pyrolysis of biomass to generate bio-oil, followed by catalytic steam reforming of the bio-oil, or a fraction thereof, to produce hydrogen. The preferred option is separation of the bio-oil into a lignin-derived fraction, which could be used for producing phenolic resins or fuel-blending components, and a carbohydrate-derived material, which would be reformed to produce hydrogen. The coproduct strategy can also be applied to residual fractions derived from pulping operations or ethanol production and to effluents from other biomass conversion technologies such as transesterification of vegetable oils or food processing residues. In addition, all of the biomass-derived liquids can be coprocessed with natural gas to produce hy...

478 citations

Journal ArticleDOI
TL;DR: In this article, a new desulfurization process by selective adsorption for removing sulfur (SARS) was developed and used for adaption desurization of diesel fuel, gasoline and jet fuel at room temperature.

414 citations

Journal ArticleDOI
TL;DR: In this article, a car tyre was pyrolysed under nitrogen in a 3.5 dm3 autoclave at 300°C, 400°C and 600°C. No significant influence of temperature on the amount and characteristics of pyrolysis products over 500°C was observed.

382 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023652
20221,485
2021199
2020296
2019326
2018359