naphthenes sentence in Hindi
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- However, both the dehydrogenation of naphthenes and the dehydrocyclization of paraffins produce hydrogen.
- It can be seen that they differ significantly in their content of paraffins, naphthenes and aromatics:
- The product stream is high in naphthenes and aromatics, low in paraffins and very low in olefins.
- The products of this process are hydrocarbon chains as well as adding hydrogen to aromatics and olefins to produce naphthenes and alkanes.
- Paraffin waxes are mixtures of saturated n-and iso-alkanes, naphthenes, and alkyl-and naphthene-substituted aromatic compounds.
- The different fractions can be passed to further processing ( Platforming, most of the naphthenes are converted to aromatics and the recovered hydrogen recycled to the process.
- JP-5 is a complex mixture of hydrocarbons, containing alkanes, naphthenes, and aromatic hydrocarbons that weighs and has a high flash point ( min . ).
- More advanced processes, such as cyclicization of paraffins and dehydrogenation of naphthenes forming aromatic hydrocarbons in a catalytic reformer, have also been developed to increase the octane rating of gasoline.
- :1 : The dehydrogenation of naphthenes to convert them into aromatics as exemplified in the conversion methylcyclohexane ( a naphthene ) to toluene ( an aromatic ), as shown below:
- If the raw material stream contains much non-aromatic components ( paraffins or naphthenes ), those are likely decomposed to lower hydrocarbons such as methane, which increases the consumption of hydrogen.
- Regardless of crude oil source or processing history, kerosene's major components are branched and straight chain alkanes and naphthenes ( cycloalkanes ), which normally account for at least 70 % by volume.
- Petroleum is a mixture of a very large number of different hydrocarbons; the most commonly found molecules are alkanes ( paraffins ), cycloalkanes ( naphthenes ), aromatic hydrocarbons, or more complicated chemicals like asphaltenes.
- The pyrolysis gasoline typically consists of C 6 to C 8 aromatics, heavier aromatics containing 9 to 11 or 12 carbon atoms, and non-aromatic cyclic hydrocarbons ( naphthenes ) containing 6 or more carbon atoms.
- The " cycloalkanes ", also known as " naphthenes ", are saturated hydrocarbons which have one or more carbon rings to which hydrogen atoms are attached according to the formula C n H 2n.
- Figure 2 is a very simplified schematic diagram that exemplifies how the process breaks high boiling, straight-chain alkane ( paraffin ) hydrocarbons into smaller straight-chain alkanes as well as branched-chain alkanes, branched alkenes ( olefins ) and cycloalkanes ( naphthenes ).
- As the vaporized reactants flow through the fixed bed of catalyst in the reactor, the major reaction is the dehydrogenation of naphthenes to aromatics ( as described earlier herein ) which is highly endothermic and results in a large temperature decrease between the inlet and outlet of the reactor.
- As also depicted in Figure 2, the cycloalkanes ( naphthenes ) formed by the initial breakup of the large molecules are further converted to aromatics such as benzene, toluene, and xylenes, which boil in the gasoline boiling range and have much higher octane ratings than alkanes.
- In terms of product types, Fischer-Tropsch production has been limited to linear paraffins, such as synthetic crude oil, whereas methanol to gasoline processes can produce aromatics, such as xylene and toluene, and naphthenes and iso-paraffins, such as drop-in gasoline and jet fuel.
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