scholarly journals The jet fuels anti-wear properties indicator

2021 ◽  
Vol 24 (6) ◽  
pp. 8-16
Author(s):  
K. I. Gryadunov ◽  
A. N. Timoshenko ◽  
K. E. Balishin ◽  
U. V. Ermolaeva
Keyword(s):  
Oil Refining ◽  
Civil Aviation ◽  
Jet Fuels ◽  
Jet Engines ◽  
Wear Properties ◽  
Composite Propellant ◽  
Oil Refineries ◽  
Political Interests ◽  
Testing Fuel

There are three main fuel brands for jet engines of civil aviation used: domestic TS-1 and RT and foreign, produced in relatively small volumes in Russia, JET A-1 (JET A-1). Since the end of the 2000s, foreign manufacturers have made claims to the quality of the mass-used domestic fuel brand TS-1, and these claims have not been specified. However, the service life of a number of foreign engines operating on TS-1 fuel has been reduced by 50%. This circumstance can be caused by both subjective reasons – commercial and political interests of equipment manufacturers, and the objective ones. The main objective reason may be that recently several Russian plants producing TS-1 fuel have begun to produce composite propellant under the same name, where products of secondary oil refining processes are added to the straight-run fractions. These fuels meet the requirements of the standard (GOST 10227-86), which does not contain an indicator that characterizes the anti-wear properties of jet fuels. In the standard for JET A-1 fuel, anti-wear properties are normalized, and they are also normalized in the standard for domestic fuels for supersonic aviation. The article presents comparative tests of anti-wear properties of samples of jet fuels used in the civil aviation. The article substantiates the relevance of the anti-wear properties indicator in the standard for domestic brands of jet fuels for subsonic aircraft introduction, as well as the comparative analysis of the anti-wear properties of fuels produced by various Russian oil refineries. Indicators and methods for assessing the anti-wear properties of aviation fuels can be different. As such an indicator, it is proposed to use the anti-wear properties indicator calculated after testing fuel samples on a four-ball friction machine.

scholarly journals COMPARATIVE ANALYSIS OF OIL PROCESSING DEPTH BY NELSON INDEX IN DIFFERENT COUNTRIES

2019 ◽  
pp. 77-81
Author(s):  
E. A. Mishukov ◽  
Yu. N. Linnik
Keyword(s):  
Comparative Analysis ◽  
Oil Refinery ◽  
Refining Industry ◽  
Oil Refining ◽  
Oil Refineries ◽  
Oil Processing ◽  
The Past ◽  
Processing Depth ◽  
Petrochemical Products

The current challenges of the domestic oil refining industry have been identified. The significance of the latest requirements for the quality of petrochemical products has been highlighted, as well as the need for technical and technological updating of oil refineries has been described. The use of the Nelson index as an assessment of the quality of petrochemical products at refineries has been considered. The formulas of the complexity factor and the Nelson index have been described. The principles and mechanisms of calculating the Nelson index for a conditional oil refinery have been disclosed. The statistics on the most modern oil refineries in Russia, using the Nelson index, has been presented. An analysis and comparison of changes by country within the framework of this indicator over the past years have been compiled.

Application of the Electrometric Method for Determining the Free Water Content in Jet Fuels

2021 ◽  
pp. 42-45
Author(s):  
D. U. Dumbolov ◽  
◽  
E. N. Lyapich ◽  
М. А. Suslin ◽  
А. А. Zaitseva ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Free Water ◽  
Cavity Resonator ◽  
Jet Fuels ◽  
Microwave Resonator ◽  
Jet Engines ◽  
Electrometric Method ◽  
Free Water Content ◽  
Cylindrical Cavity Resonator

The article provides an analysis of the deficiencies of fuel purity control tools for jet engines currently in use. It presents theoretical and experimental studies of the dependence of the loaded quality of a cylindrical cavity resonator on the volume of water placed in it, on the basis of which a method of determining the concentration of free water in jet fuels by the direct electrometric method using a microwave resonator is proposed.

scholarly journals The relevance of lubricating properties indicator into the Russian standard for civil aviation jet fuels introduction

2021 ◽  
Vol 1942 (1) ◽  
pp. 012063
Author(s):  
K I Gryadunov ◽  
A N Kozlov ◽  
I S Melnikova ◽  
A N Timoschenko ◽  
K E Balishin
Keyword(s):  
Civil Aviation ◽  
Jet Fuels ◽  
Lubricating Properties

scholarly journals Analysis of the Influence of Local Politics on Implementation SDGs 4 Policy for Quality Education

2021 ◽  
pp. 196-204
Author(s):  
Wilda Rasaili ◽  
Dafik Dafik ◽  
Rachmat Hidayat ◽  
Hadi Prayitno
Keyword(s):  
Policy Implementation ◽  
Local Politics ◽  
Local Level ◽  
Quality Education ◽  
Local Democracy ◽  
Public Meetings ◽  
A Value ◽  
Political Interests

SDGs-4, the quality education is one of the factors in achieving the goals of the SDGs. The problem is that the SDGs look ambitious in integrating local level policies that are responsive to political interests. The research used a mixed method of exploration, searching for interview data and questionnaires. The results showed that the implementation of the SDGs was strongly influenced by local democracy. The implementation of the promotion of SDGs requires strengthening local politics and democracy, including; the quality of the Pilkada, the role of the community, political parties, media control, and public meetings. The influence of local democracy on policy implementation is 51.5%. Policy implementation has a positive effect on the implementation of the SDGs with a value of 0.187. The influence of local democracy and policy implementation on the promotion of SDGs-4 is 64.2% and the remaining 35.8% is influenced by other factors.

A technology for multifunctional hydroprocessing of oil residues (vacuum residue and atmospheric residue) on the catalysts with hierarchical porosity

2021 ◽  
Vol 21 (5) ◽  
pp. 331-360
Author(s):  
E. V. Parkhomchuk ◽  
K. V. Fedotov ◽  
A. I. Lysikov ◽  
A. V. Polykhin ◽  
E. E. Vorobyeva ◽  
...  
Keyword(s):  
Economic Efficiency ◽  
Material Balance ◽  
Value Added ◽  
Oil Refining ◽  
Vacuum Residue ◽  
Process Data ◽  
Marine Fuel ◽  
Delayed Coking ◽  
Oil Refineries ◽  
Atmospheric Residue

A technology for catalytic hydroprocessing of oil residues – atmospheric residue and vacuum residue – aimed to obtain high value added petrochemicals, particularly marine fuel complying with modern technical and environmental requirements, is reported. The technologyis based on the use of catalysts supported on alumina with a hierarchical structure of meso- and macropores, which are highly active and stable under severe conditions of the process. Data obtained by physicochemical analysis of the chemical composition, textural and phase properties of fresh and spent catalysts for the three-step hydroprocessing of atmospheric residue and vacuum residue are presented. A material balance for each step of the processes and a comprehensive analysis of the properties of produced petrochemicals were used to propose variants of implementing and integrating the technology at Russian oil refineries in order to increase the profit from oil refining. The introduction of the hydroprocessing of atmospheric residue at oil refineries without secondary processes will improve the economic efficiency due to selling the atmospheric residue by 84–170 % depending on a chosen scheme of the process and a required set of products. It is reasonable to integrate the catalytic hydroprocessing of vacuum residue with the delayed coking, catalytic cracking and hydrocracking processes in order to increase the depth of refining to 95 % and extend the production of marketable oil refining products: gasoline, diesel fuel, marine fuel with the sulfur content below 0.5 %, and low-sulfur refinery coke for the electrode industry. The integration of the hydroprocessing of vacuum residue with the secondary processes will increase the economic efficiency from selling the vacuum residue by a factor of 2–2.5 in comparison with its production in delayed coking units.

تقييم واقع صناعة تصفية النفط في العراق

2021 ◽  
Vol 2020 (67) ◽  
pp. 154-184
Author(s):  
دانية اياد جاسم ◽  
أ. د . فلاح خلف علي
Keyword(s):  
Crude Oil ◽  
Electrical Current ◽  
Oil Products ◽  
Refining Industry ◽  
Oil Refining ◽  
High Quality ◽  
Investment Projects ◽  
Oil Refineries ◽  
Self Sufficiency ◽  
Strong Sector

The oil refining industry in Iraq is one of the industries of strategic importance, and what these industries have been subjected to destruction, obsolescence and neglect in a way that led to the deterioration of oil products in quantity and quality, and in a manner that is not commensurate with Iraq's capabilities in the field of daily crude oil production, as well as its incompatibility with laws and standards. In addition to the inability of these industries to achieve self-sufficiency and resort to closing the gap through imports. The study assumes that rebuilding the oil refineries in Iraq on modern foundations commensurate with international environmental laws and standards, will contribute to achieving self-sufficiency in high-quality oil products and open new horizons for the refining industry. The study reached several conclusions, the most important of which are the most important reasons for the decline in the production of refineries in Iraq, failure to implement investment projects for the oil refineries sector, reliance on old methods of liquidation, obsolescence of treatment units, neglect of maintenance and maintenance operations, and continuous stops due to the interruption of electrical current, and sabotage of some pipelines that transport crude oil to the refineries. The researcher recommended that the existence of a strong sector of refineries in Iraq capable of securing energy sources and achieving self-sufficiency, in addition to its ability to compete, that achieving this goal requires working on building new and modern refineries and rehabilitating old refineries to increase production capacities and obtain high-quality oil products to Iraq can compete in the global

Oligarchizacja mediów w Czechach na przykładzie koncernu Mafra Andreja Babiša

2021 ◽  
Vol 24 (324) ◽  
pp. 183-200
Author(s):  
Katarzyna Giereło-Klimaszewska
Keyword(s):  
Public Debate ◽  
The Public ◽  
Media Companies ◽  
Political Interests ◽  
The World ◽  
The Media ◽  
Political Decisions

The contemporary functioning of the media is inextricably linked with what is happening in the world ofpolitics. The case of the Mafra corporation and the behaviour of its owner Andrej Babiš shows how throughthe interrelations of these two spheres the media can influence the shaping of political decisions, opinionsor preferences in the elections. The penetration of business and political interests, related informal layoutsand dependencies as well as high media instrumentation allow us to claim that today the process ofoligarchisation of the Czech media is highly advanced. This is connected with the increasing concentrationof ownership of media companies and intervention of the owners into the published content, but also withchanges in journalism itself. The media cease to be a “watch dog” controlling the authorities and caringabout the quality of public debate. Instead, they are creating reality, more and more openly, attemptingto manipulate the public, which results in less and less trust on their part and poses a serious threat todemocracy.

Ecological aspects of storage and transportation of diesel fuels

2021 ◽  
pp. 49-54
Author(s):  
V.Kh. Nurullayev ◽  
◽  
Kh.G. Ismayilova ◽  
L.M. Shikhiyeva ◽  
◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Fractional Composition ◽  
Freezing Temperature ◽  
Environmental Safety ◽  
Petroleum Products ◽  
Oil Products ◽  
Jet Fuels ◽  
Diesel Fuels ◽  
Ecological Aspects

The paper presents up-to-date and perspective requirements for the quality of diesel fuels. The effect of chemical, as well as fractional composition on the quality of diesel fuels is marked. The capability of obtaining prospective ecologically friendly diesel fuel based on the mixture of Azerbaijani oils via hydro-treatment in the presence of the catalyst of alumonickelmolibdene is noted. Ecologically friendly diesel fuels with ASTMD 4294 by sulfur - 0.039 % mass, ASTMD 3227 by sour sulfur - 0.006 % mass, ASTMD 5708 by metals: V ˃ 2 mg/kg, Ni ˃ 1 mg/kg, Fe ˃ 3 mg/kg, Na ˃ 8 mg/kg, as well as with the freezing temperature of ASTMD 97 – 50 оС have been obtained. Such kinds of diesel fuel meet EN standards and provide environmental safety in storage and transportation to the European countries. The prospect of obtaining and using buffer plug (mixture of petroleum products) during consistent pumping of various sorts of oil products without ecologic-economic risks of jet fuels is shown as well.

scholarly journals A Phenomenological Study on the Synergistic Role of Precious Metals in the Steam Reforming of Logistic Fuels on Trimetal-Supported Catalysts

2010 ◽  
Vol 2010 ◽  
pp. 1-12 ◽  
Author(s):  
Abdul-Majeed Azad ◽  
Desikan Sundararajan
Keyword(s):  
Steam Reforming ◽  
Precious Metal ◽  
Noble Metals ◽  
Phenomenological Study ◽  
Supported Catalysts ◽  
Precious Metals ◽  
Jet Fuels ◽  
Metal Loading

Fuel processors are required to convert sulfur-laden logistic fuels (jet fuels, diesel, and coal) into fuel cell quality hydrogen-rich reformate with little or no sulfur for extended periods. Sulfur poisons and deactivates the reforming catalyst, therefore, sulfur-tolerant catalysts ought to be developed. In this paper, the development, characterization, and evaluation of a series of nanoscale ceria-supported reforming catalysts containing three noble metals in low concentration (1 wt% ≤ total metal loading ≤ 1.33 wt%) for the steam-reforming of kerosene (a JP-8 surrogate) are reported. Their performance is quantified in terms of H2yield, tolerance towards sulfur in the fuel, and the on-stream stability and compared with that of monometal and bimetal analogs under identical conditions. Due to the inherent cooperative synergy, a trimetal catalyst was found far superior to its mono- and bimetallic analog containing same amount of the precious metal loading in terms of quality of the reformate (measured by H2level in steady-state) as well as the catalyst longevity on-stream prior to deactivation. At the same time a mechanistic correlation between the distinct role of a given precious metal and the extent of its loading in each of the formulations and quality of the corresponding desulfurized H2-rich reformate was discovered.

System Level Performance and Emissions Evaluation of Renewable Fuels for Jet Engines

2014 ◽  
Author(s):  
Kadambari Lokesh ◽  
Vishal Sethi ◽  
Theoklis Nikolaidis ◽  
Devaiah Karumbaiah
Keyword(s):  
Engine Performance ◽  
Operating Conditions ◽  
System Level ◽  
Civil Aviation ◽  
Jet Engines ◽  
Stirred Reactor ◽  
Fuel Burn ◽  
Performance And Emissions ◽  
Aircraft Performance ◽  
Level Performance

Incessant demand for fossil derived energy and the resulting environmental impact has urged the renewable energy sector to conceive one of the most anticipated sustainable, alternative “drop-in” fuels for jet engines, called as, Bio-Synthetic Paraffinic Kerosene (Bio-SPKs). Second (Camelina SPK & Jatropha SPK and third generation (Microalgae SPK) advanced biofuels have been chosen to analyse their influence on the behaviour of a jet engine through numerical modelling and simulation procedures. The thermodynamic influence of each of the biofuels on the gas turbine performance extended to aircraft performance over a user-defined trajectory (with chosen engine/airframe configuration) have been reported in this paper. Initially, the behaviour of twin-shaft turbofan engine operated with 100% Bio-SPKs at varying operating conditions. This evaluation is conducted from the underpinning phase of adopting the chemical composition of Bio-SPKs towards an elaborate and careful prediction of fluid thermodynamics properties (FTPs). The engine performance was primarily estimated in terms of fuel consumption which steers the fiscal and environmental scenarios in civil aviation. Alternative fuel combustion was virtually simulated through stirred-reactor approach using a validated combustor model. The system-level emissions (CO2 and NOx) have been numerically quantified and reported as follows: the modelled aircraft operating with Bio-SPKs exhibited fuel economy (mission fuel burn) by an avg. of 2.4% relative to that of baseline (Jet Kerosene). LTO-NOx for the user-defined trajectory decreased by 7–7.8% and by 15–18% considering the entire mission. Additionally, this study reasonably qualitatively explores the benefits and issues associated with Bio-SPKs.

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