Topic
Aromatic hydrocarbon
About: Aromatic hydrocarbon is a research topic. Over the lifetime, 5814 publications have been published within this topic receiving 55499 citations. The topic is also known as: arene & arenes.
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14 May 1997TL;DR: In this paper, an alkylated aromatic hydrocarbon is produced by isomerizing a normal alpha-olefin having from 20 to 28 carbon atoms in the presence of a first acidic catalyst to produce a partially-branched, isomerized olefin.
Abstract: An alkylated aromatic hydrocarbon is produced having the following properties: (a) less than 40 wt. % of the alkylated aromatic hydrocarbon is 2-aryl; and (b) at least 20 wt. % of the alkylated aromatic hydrocarbon is a monoalkylate. That alkylated aromatic hydrocarbon is produced by isomerizing a normal alpha-olefin having from 20 to 28 carbon atoms in the presence of a first acidic catalyst to produce a partially-branched, isomerized olefin, then either benzene or toluene is alkylated with the partially-branched, isomerized olefin in the presence of a second solid, acidic catalyst. The first acidic catalyst can be a molecular sieve with a one-dimensional pore system. The second acidic catalyst can be a zeolite Y having a silica to alumina ratio of at least 40:1.
54 citations
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TL;DR: Preliminary investigations suggest that the enzyme concerned in the reduction of these epoxides is specific for both 'K-region' and 'non-K- Region' arene oxides.
Abstract: 1. The oxidation of aromatic hydrocarbons to arene oxides and the reduction of these oxides to the parent hydrocarbons are both catalysed by enzymes in the microsomal fraction of rat liver. A suggested name for the enzyme concerned in the reduction of these epoxides is 'epoxide reductase'.2. 'Epoxide reductase' is NADPH-dependent and is inhibited by oxygen.3. Preliminary investigations suggest that the enzyme is specific for both 'K-region' and 'non-K-region' arene oxides.
53 citations
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TL;DR: In this article, the detectabilities and some parameters of electron + aromatic hydrocarbon reactions were investigated in a constant-current, variable-frequency electron-capture detector, and it was found that lower alkylbenzenes give weak signals in the detector, polymethylbenenes, styrene, indene, naphthalenes and biphenyl exhibit medium responses, whereas the response factors of aromatics with three rings and those of diphenylthylene, diphenynylacetalyne and azulene are relativity high.
53 citations
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TL;DR: The results of physical experiments and quantum calculations revealed that the charge density of carbon atoms increases with an increase in the number of methyl groups, which promotes the electrophilic attack of ·OH.
Abstract: Aqueous aromatic hydrocarbons are chemically stable, high toxic refractory pollutants that can only be oxidized to phenols and quinone on either Pt or traditional PbO2 electrodes. In this study, a novel method for the electrochemical incineration of benzene homologues on superhydrophobic PbO2 electrode (hydrophobic-PbO2) was proposed under mild conditions. Hydrophobic-PbO2 can achieve the complete mineralization of aromatic hydrocarbons and exhibit high removal effect, rapid oxidation rate, and low energy consumption. The kinetics of the electrochemical incineration was also investigated, and the results revealed that the cleavage of the benzene ring is a key factor affecting the incineration efficiency. Moreover, on hydrophobic-PbO2, the decay of intermediates was rapid, and low concentrations of aromatics were accumulated during the reaction. The removal of the initial pollutants and the effects of oxidative cleavage were related to the number of methyl groups on the benzene ring. Specifically, the resu...
53 citations
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TL;DR: In this article, the Fischer-Tropsch synthesis (FTS) over a Pd-promoted Fe/HZSM-5 catalyst was studied for the production of aromatic-rich gasoline-range hydrocarbons from wood biomass-derived syngas (biosyngas).
Abstract: The production of aromatic-rich gasoline-range hydrocarbons from wood biomass-derived syngas (biosyngas) was studied by the Fischer–Tropsch synthesis (FTS) over a Pd-promoted Fe/HZSM-5 catalyst. The Pd promoter enhances the catalytic performance of the Fe/HZSM-5 catalyst and promotes the formation of aromatic hydrocarbons. The reaction conditions, i.e., temperature, pressure, and gas hourly space velocity (GHSV), significantly affected the aromatic hydrocarbon selectivity. The higher reaction temperature leads to the higher selectivity toward aromatics in liquid hydrocarbon products. An increase in the reaction pressure also favors the formation of aromatics, but its effect is not as significant as that of the reaction temperature. GHSV has a negative effect on the formation of aromatics because of the short-time contact of the reactant gas with the catalyst. The aromatic hydrocarbon selectivity ranges from 29 to 45%, which is dependent upon the reaction conditions. Aromatic hydrocarbons are mainly compos...
52 citations