scholarly journals Effect of the Dewaxol 7801 depressant-dispersant additive on summer diesel fuel

2021 ◽  
Vol 83 (2) ◽  
pp. 180-183
Author(s):  
E. L. Iovleva
Keyword(s):  
Low Temperature ◽  
Diesel Fuel ◽  
Hydrocarbon Composition ◽  
Dicarboxylic Acids ◽  
Ethylene Vinyl Acetate ◽  
Physicochemical Characteristics ◽  
Long Term Storage ◽  
Depressant Additive ◽  
Dispersant Additive ◽  
Filterability Temperature

Obtaining winter diesel fuel is an expensive and complex process, in which paraffinic hydrocarbons are removed from the fuel. Today, the consumption of winter diesel fuel in Russia has reached its maximum, and the volume produced is not enough to meet the needs of the Russian market. Therefore, obtaining winter diesel fuel from summer grades, by adding a depressant additive, remains relevant. The most common depressants are ethylene vinyl acetate copolymers. The effectiveness of depressant-dispersant additives depends on the fractional and group hydrocarbon composition of diesel fuel. Also, the physicochemical characteristics of the paraffins contained in the fuel play an important roleDuring long-term storage of fuel, depressants do not prevent fuel stratification. Therefore, together with a depressant additive, a paraffin dispersant is used, the composition of such additives includes mainly amides and imides of mono- and dicarboxylic acids. Dewaxol 7801 depressant and dispersant additive is a specially selected composition based on surfactants and copolymers in a hydrocarbon solvent. The use of this additive makes it possible to improve the low-temperature performance of diesel fuel without affecting other properties. From the low-temperature properties of diesel fuel, we have chosen the limiting filterability temperature, since it is this temperature that characterizes the real working conditions. When the maximum filterability temperature is reached, the n-paraffin crystals reach sizes exceeding the pore diameters of the filters, the fuel is not pumped through the fine filters of the high-pressure fuel pump, and the fluidity of the fuel deteriorates. The article shows the effect of Dewaxol 7801, a depressant-dispersant additive, on summer diesel fuel, in various concentrations and when the fuel is heated from 40 to 60 degrees in steps of 10 degrees.

scholarly journals Improving the cold flow properties of marine diesel fuel using centrifugation

2020 ◽  
Vol 11 (29) ◽  
pp. 24-33
Author(s):  
Nikolay Yakovlev ◽  
Vyacheslav Agaev ◽  
Evgeniy Zemlyansky
Keyword(s):  
Low Temperature ◽  
Diesel Fuel ◽  
Freezing Point ◽  
Optimal Parameters ◽  
Flow Properties ◽  
Cold Flow ◽  
Cold Flow Properties ◽  
Depressant Additive ◽  
Marine Diesel ◽  
Centrifuge Rotor

The possibility of improving the low-temperature properties of marine diesel fuel of the Antipinsky Refinery by dewaxing was studied. Paraffin was isolated from the fuel in a centrifuge in the presence of a depressant additive. The depressant additive is selected from a series of synthesized additives for depressant effectiveness. The influence of the centrifuge rotor speed, the additive content and the initial cooling temperature of the sample on the dewaxing parameters of the fuel was studied. The possibility of isolating the additive from the obtained paraffin concentrates is shown. The dewaxing products obtained under optimal conditions were studied. A paraffin concentrate product containing 40.03% solid paraffins was isolated from fuel. Paraffin was isolated from paraffin concentrate by dewaxing with a selective solvent. The cloud point and freezing point of paraffin were 30 and 29 ° C, respectively. When converted to the original fuel, the amount of released paraffins was 7.3% of the 21% by weight contained in the original fuel. The fuel obtained at optimal parameters for low temperature properties corresponds to grade D of diesel fuel according to EN 590: 2009.

Influence of low-molecular-weight copolymers of ethylene with vinyl acetate on the low-temperature properties of diesel fuel

1974 ◽  
Vol 10 (8) ◽  
pp. 615-618 ◽  
Author(s):  
G. G. Krasnyanskaya ◽  
B. V. Gryaznov ◽  
V. A. Kryunina ◽  
S. L. Lyubimova ◽  
V. N. Monastyrskii ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Low Temperature ◽  
Vinyl Acetate ◽  
Diesel Fuel ◽  
Low Molecular Weight

Preparation of n-Alkylacrylate and Vinyl Acetate Copolymer and Its Influence on Low-Temperature Fluidity of Diesel Fuel

2011 ◽  
Vol 236-238 ◽  
pp. 708-714 ◽  
Author(s):  
Hong An ◽  
Shu Gang Gao ◽  
Shuang Li ◽  
Yan Xin Xie
Keyword(s):  
Molecular Weight ◽  
Low Temperature ◽  
Vinyl Acetate ◽  
Diesel Fuel ◽  
Mass Fraction ◽  
Raw Materials ◽  
Cold Filter Plugging Point ◽  
Point Depressant ◽  
Petrochemical Company ◽  
Acetate Copolymer

The n-tetradecylacrylate-vinyl acetate copolymer (PPV) was prepared from n-tetradecylacrylate and vinyl acetate. The PPV was employed as pour point depressant to improve the low-temperature fluidity of the -20# diesel from Daqing Petrochemical Company. The result indicated that the solidification (SP) and the cold filter plugging point (CFPP) were affected largely by PPV. And when mass fraction of PPV -14(copolymerization conditions: 80 °C,w（benzoyl peroxide）1％（total weight of raw materials）, n（vinyl acetate）∶n（n- tetradecanolacrylate） = 4∶1 ) in diesel fuel was 0.1%wt, the SP reduced by 15.0 °C, the CFPP reduced by 6.0 °C simultaneously; We analysise the different molecular weight of PPV-14, and discover that the molecular weight of PPV-14 is ralated to the the low-temperature fluidity of the -20# diesel from Daqing Petrochemical Company. When mass fraction of PPV -14(molecular weight is 15000, distribution coefficient is 3.11) in diesel fuel was 0.1% wt, the SP reduced by 18.0 °C, the CFPP reduced by 7.0 °C, simultaneously.

Response of diesel fuels to pour-depressant additive V�S-238 in relation to fuel hydrocarbon composition

1978 ◽  
Vol 14 (11) ◽  
pp. 804-808 ◽  
Author(s):  
T. N. Veretennikova ◽  
B. A. �nglin ◽  
V. G. Nikolaeva ◽  
T. N. Mitusova ◽  
E. I. Elenskaya
Keyword(s):  
Hydrocarbon Composition ◽  
Diesel Fuels ◽  
Depressant Additive

scholarly journals Simultaneous particulate matter and nitrogen oxide emission reduction through enhanced charge homogenization in diesel engines

2018 ◽  
Vol 22 (5) ◽  
pp. 2039-2052 ◽  
Author(s):  
Urban Zvar-Baskovic ◽  
Rok Vihar ◽  
Samuel Rodman-Opresnik ◽  
Tomaz Katrasnik
Keyword(s):  
Particulate Matter ◽  
Low Temperature ◽  
Diesel Fuel ◽  
Minor Effect ◽  
Exhaust Gas ◽  
Low Temperature Combustion ◽  
Engine Control ◽  
Pyrolysis Oil ◽  
Trade Off ◽  
Temperature Combustion

In the presented study, low temperature combustion was established with a direct injection of diesel fuel being a representative of high reactivity fuels and tire pyrolysis oil being a representative of low reactivity fuels. Tire pyrolysis oil was tested as a potential waste derived fuel for low temperature combustion, as it features diesel-like physical properties and lower cetane number compared to diesel fuel. The goal of this study was determination of suitable injection strategies and exhaust gas re-circulation rates to explore potentials of both fuels in reducing emissions in low temperature combustion modes. It was demonstrated that relatively small changes in the engine control strategy possess the potential to significantly improve NOx/particulate matter trade-off with minor effect on engine efficiency. In addition, low temperature combustion was for the first time successfully demonstrated with tire pyrolysis oil fuel, however, it was shown that lower re-activity of the fuel is by itself not sufficient to improve NOx /soot trade-off compared to the diesel fuel as entire spectra of fuel properties play an important role in improving NOx /soot trade-off. This study thus establishes relations between different engine control strategies, intake manifold pressure and exhaust gas recirculation rate on engine thermodynamic parameters and engine-out emissions while utilizing innovative waste derived fuel that have not yet been analysed in similar combustion concepts.

Influence of poly (methacrylate-co-maleic anhydride) pour point depressant with various pendants on low-temperature flowability of diesel fuel

Fuel ◽  
2018 ◽  
Vol 216 ◽  
pp. 898-907 ◽  
Author(s):  
Guangwen Xu ◽  
Yuan Xue ◽  
Zhicheng Zhao ◽  
Xiang Lian ◽  
Hualin Lin ◽  
...  
Keyword(s):  
Low Temperature ◽  
Maleic Anhydride ◽  
Diesel Fuel ◽  
Pour Point ◽  
Pour Point Depressant ◽  
Point Depressant

Bifunctional cobalt catalyst for the Fischer – Tropsch synthesis of low-freezing diesel fuel – from development to implementation: Part 1. Selection of a commercial sample of the HZSM-5 zeolite component

2021 ◽  
Vol 1 (1-2) ◽  
pp. 30-40
Author(s):  
R. E. Yakovenko ◽  
I. N. Zubkov ◽  
V. G. Bakun ◽  
M. R. Agliullin ◽  
A. N. Saliev ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Cobalt Catalyst ◽  
Hydrocarbon Composition ◽  
Tropsch Synthesis ◽  
Practical Implementation ◽  
Fischer Tropsch ◽  
Commercial Sample ◽  
Zeolite Sample ◽  
Fischer Tropsch Synthesis ◽  
Composite Mixture

The effect of the quality of various domestic commercial HZSM-5 zeolites on the properties of bifunctional cobalt catalyst represented by a composite mixture was studied in the Fischer – Tropsch synthesis. Activities and selectivities of the catalyst samples were compared. The fractional and hydrocarbon composition of the synthesis products was investigated; viscosity-temperature characteristics of the diesel fuel fraction were estimated. A promising HZSM-5 zeolite sample was selected for practical implementation of the catalytic technology.

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