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cetane
Fischer-Tropsch (F-T) diesel fuel is characterized by a high cetane number, a near-zero sulphur content and a very low aromatic level.
      
Effect of paraffins C10-C13, C14-C17, C18-C23, tert-butyl hydroperoxide, cumyl hydroperoxide, and isopropyl nitrate as cetane number improvers for summer- and winter-grade diesel fuels, added in amount of 0.4-5 wt %, is studied.
      
On the basis of published data, parametric equations relating the basic physicochemical characteristics of off-standard diesel fuels, i.e., the cetane number, the density, and the sulfur content, were derived.
      
Effect of structure formation in a constant electric field on the thermal conductivity of a suspension of aerosil in cetane
      
A tailored interface shock tube and an over-tailored interface shock tube were used to measure the thermal energy radiated during diesel-spray combustion of light oil, α-methylnaphthalene and cetane by changing the injection pressure.
      
8.54, 6.86 and 5.39% solutions of polyisobutylene in cetane were studied using a recently developed electromagnetic transducer over the frequency range 0.3 to 150 c.p.s.
      
Samples of polyisobutylene/cetane and some aqueous solutions of different concentrations were used for measurements using two tubes of different materials and sizes tilted at different angles.
      
Estimation of cetane index for esters of fatty acids
      
Cetane indexes have been calculated for the esters of the individual saturated fatty acids in the C8-C24 range plus palmitoleic, oleic, linoleic, and linolenic acids.
      
Two methods were used for these calculations: ASTM 976 and a method involving simultaneous equations relating the experimentally determined cetane numbers for several transesterified oils and the fatty acid compositions of the oils.
      
Cetane indexes calculated according to ASTM 976 produced values which were too low for ester mixtures high in saturated acids and low in polyunsaturated acids, and were somewhat high for ester mixtures high in polyunsaturated acids.
      
When cetane indexes calculated according to the simultaneous equation method were applied to the fatty acid mixtures, the agreement with those experimentally determined was approximately the error of determination of the cetane number.
      
A simple method for estimation of cetane index of vegetable oil methyl esters
      
This article illustrates a simple method for estimation of cetane indexes of vegetable oil methyl esters from their saponification and iodine numbers.
      
The range of the calculated values covers all the cetane numbers of vegetable oil methyl esters determined experimentally.
      
The pyrolyzates had lower viscosities and higher cetane numbers than the parent vegetable oil.
      
Predicting cetane numbers of n-alcohols and methyl esters from their physical properties
      
Cetane numbers (C#) for the homologous series of straight-chain, saturated n-alcohols, C5-C12 and C14, were determined according to ASTM D 613.
      
Neither the lower cetane number of POD fuel nor its emulsification with water presented obstacles to the operation of the diesel engine during a series of steady-state engine tests and the twenty-hour endurance tests.
      
Fuel properties, such as cetane number, also were investigated.
      
 

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