Results 1 to 10 of about 195,029 (168)

Oil Characterization, Molecular Modeling and Process Simulation in Petroleum Research and Industry, Opportunities, Challenges and Perspectives [PDF]

open access: yesMolecules
Petroleum is a valuable mineral resource from which base fuels and innumerable materials are produced. Its optimized utilization requires a deeper understanding of its chemistry, that can be obtained by improved characterization and molecular modeling ...
Svetlin Vasilev   +12 more
doaj   +2 more sources

Adsorptive Treatment of Residues on Macroporous Adsorbent for Marine Fuel Production Scheme on Refinery

open access: yesJournal of Marine Science and Engineering, 2023
Adsorptive treatment using granulated macroporous Al2O3-SiO2 adsorbent is proposed as a preliminary stage for residue pretreatment in refineries. The study evaluates the adsorptive treatment of atmospheric and visbreaking residue at 485–510 °C and 1 h−1 ...
Renata Iuzmukhametova   +5 more
doaj   +1 more source

Tailoring NiMo-Based Catalysts for Production of Low-Viscosity Sustainable Hydrocarbon Bases for Drilling Muds from Secondary Gas Oils

open access: yesEnergies, 2023
This article presents the prospect of using the process of deep hydrodesulfurization and hydrodearomatization of secondary gas oils using highly active NiMo catalysts to obtain hydrocarbon bases for drilling fluids.
Aleksei Iusovskii   +6 more
doaj   +1 more source

Efficient CO2 methanation using nickel nanoparticles supported mesoporous carbon nitride catalysts

open access: yesScientific Reports, 2023
The CO2 methanation technique not only gives a solution for mitigating CO2 emissions but can also be used to store and convey low-grade energy. The basic character and large surface area of mesoporous carbon nitride, (MCN), are considered promising ...
Zakaria Refaat   +6 more
doaj   +1 more source

Xylene Isomerization using Hierarchically Mesoporous ZSM-5

open access: yesBulletin of Chemical Reaction Engineering & Catalysis, 2023
The current study described the synthesis of H-ZSM-5 zeolites with hierarchical micro-meso- porosity (HM-ZSM-5-x) via the soft-templating route, employing organosilane surfactant, 3-[(trimethoxysilyl) propyl]octyldimethyl-ammonium chloride, as the ...
Ahmed El Fadaly   +5 more
doaj   +1 more source

HYDROGENOLYSIS OF PALM OIL DERIVED METHYL ESTERS OVER NIOBIUM AND TUNGSTEN BASE CATALYSTS

open access: yesStudia Universitatis Babes-Bolyai Chemia, 2023
Vegetable oils are widely available in nature and are one of the most important sustainable feedstocks for biofuel production. W/Pd/γ-Al2O3-ZnZSM-5 and Nb/Pd/γ-Al2O3-ZnZSM-5 catalysts where prepared, characterized and tested in the hydrogenolysis ...
Mihai MARINESCU   +5 more
doaj   +1 more source

Economical Assessment of Replacing and Refining Methods of Hydraulic Oil of Sugarcane Harvesters in Sugarcane Cultivation Industry of Khuzestan [PDF]

open access: yesJournal of Agricultural Machinery, 2021
Contamination due to hydraulic fluids exerts deleterious effects after a long time, however this factor is often ignored or its consecutive breakdowns and system failures are considered due to other factors.
H Nematpour Malek Abad   +3 more
doaj   +1 more source

Reduction and Refinement [PDF]

open access: yesElectronic Notes in Theoretical Computer Science, 2008
In this paper we explore the relation between refinement and reduction, especially as it is used in the context of cryptography. We show how refinement is a special case of reduction, and more interestingly, how reduction is an instance of a novel generalisation, ''refinement with context''.
Eerke A. Boiten, Dan Grundy
openaire   +1 more source

Optimasi kondisi proses pemurnian (Degumming- netralisasi) minyak nyamplung dengan response surface methodology

open access: yesAgrointek, 2023
Calophyllum seeds produce high-yielding non-edible oils, so Calophyllum plants have great potential as a source of biofuels. To meet biofuel quality standards, crude Calophyllum oil must first be refined.
Ika Amalia Kartika, Muhamad Ryan Pratama
doaj   +1 more source

Testing refinements by refining tests [PDF]

open access: yes, 1998
One of the potential benefits of formal methods is that they offer the possibility of reducing the costs of testing. A specification acts as both the benchmark against which any implementation is tested, and also as the means by which tests are generated.
John Derrick, Eerke A. Boiten
openaire   +1 more source

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