The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A pilot-scale 25kg/h fluidized bed, oxygen/steam blown gasifier and syngas cleaning system was developed to convert switchgrass into clean syngas. The system is rated for operation at gage pressures up to 1bar. The reactor vessel incorporated a novel guard heating system to simulate near-adiabatic operation of large commercial-scale gasifiers, and was effective for gasification temperatures up to...
In this study, an experimental investigation of particle size distribution emission over performance of transient conditions in a high speed diesel engine fuelled with diesel, biodiesel and Fischer Tropsch fuels have been assessed. Six fuels with different properties have been tested in a 4-cylinder light-duty diesel engine typically used for European passenger cars. The cycle used in this study was...
Syngas from biomass and coal gasification contains ammonia (NH3) and hydrogen cyanide (HCN) that originate from fuel bound nitrogen (FBN). Despite being minor constituents of the syngas, they are of great interest. They represent NOX precursors when the syngas is burned for process heating or IGCC applications and catalyst poison if the syngas is to be converted to fuels or chemicals. Measuring NH...
The rheological characterization of biodiesel at low temperatures is discussed. Gelling typically occurs in this range, and consequently the mechanical behavior becomes viscoplastic. We illustrate that the rheology of the gelled biodiesel is a strong function of the shear and thermal histories, and due to this dependence the testing conditions must be determined prior to the execution of a rheological...
The primitive purpose of the present paper is to address the wall heat flux modeling of n-heptane fueled direct injection (DI) diesel engine with the application of a coupled computational fluid dynamics (CFD) and artificial neural network (ANN) approach. The numerical model was established for a Ford 1.8l DI diesel engine equipped with a prototype Lucas CAV HPCR system, and an Allied Signal VGT....
A novel fuel named the Full Distillation Fuel (FDF) is proposed in this paper to lower the full life-cycle cost of the end use of petroleum-based fuels and reduce emissions. FDF is a liquid fuel and its distillation temperature range covers gasoline, kerosene and diesel fuel. There is no need to employ different distillation and refinery processes to produce gasoline and diesel fuels; instead, a single...
An environmentally friendly and low cost adsorbent, PPC (patent application filed González (2013)), produced from an abundant residue from the food industry, coffee grounds, is presented and evaluated as CO2 adsorbent in postcombustion conditions. PPC is a high bulk density pelletized carbon with adequate properties for its use in fixed-bed adsorption applications. The equilibrium capacity for CO2...
The research focused mainly on kinetics of the side reactions occurring during homogeneous base-catalysed transesterification processes, which were not studied previously. The rates of fatty acid methyl esters (FAME) saponification with sodium and potassium hydroxides were investigated in methanol and ethanol (commonly used in biodiesel production) at temperatures of 40, 50 and 60°C. The effect of...
The polarity of asphaltenes influences production, transportation, and refining of heavy oils. However, the dipole moment of asphaltene molecules is difficult to measure due to their complex composition and electromagnetic opaqueness. In this work, we present a convenient and efficient way to determine the dipole moment of asphaltene in solution by dielectric measurements alone without measurement...
A mineralogical study was undertaken of air heater deposits in a 300MWe pf boiler located in Western Australia in order to understand deposit formation in the air heater sections of the boiler as an aid to implement possible remediation actions. Several air heater deposit samples were collected in the selected regions of the air heater along with samples of the feed coal, bottom ash and fly ash for...
The influx of the liquid phase of drilling fluid, known as filtrate, in oil and gas producing zones can cause a significant decrease in the relative permeability of the fluids in the reservoir, and consequently, the well’s productivity. The growing interest in developing non-aqueous fluids with low toxicity and good performance under extreme temperature and pressure conditions encourages research...
Water-in-oil emulsions constitute a widespread issue for the oilfield industry. Indeed, the phases of water-in-oil emulsions must be separated as soon as possible in the production chain. These emulsions can be fairly stable due to certain intrinsic components in crude oil; therefore, adding chemicals – demulsifiers – to aid this separation is very common. Selecting the ideal demulsifier can save...
Extraction of aromatic sulfur compounds from model oil using a temperature-responsive ionic liquid (IL) N-butyl-N-methylpiperidinium tetrachloroferrate ([C4mpip]FeCl4) as extractant has been investigated. In the extractive desulfurization process, liquid–liquid equilibrium was obtained at 45°C for 10min. After the extraction system was cooled to room temperature, the IL returned to solid due to the...
The diesel/methanol dual fuel (DMDF) combustion mode was conducted on a turbo-charged, inter-cooling diesel engine with 6-cylinder for the heavy duty (HD) vehicle. In DMDF mode, methanol is injected into the intake port to form lean air/methanol premixed mixture, and then ignited by the direct-injected diesel fuel in cylinder. This study is aimed to investigate the effect of diesel injection pressure...
The merit of coconut oil at nutritional, therapeutic, industrial level has provided a distinct status to coconut as an oleaginous crop. The functional property of coconut methyl ester (CME) produced from coconut oil by chemical transesterification was proved in diesel vehicle by test run directly as biofuel without any modifications in the engine and in the fuel lines. The test run showed the technical...
The combustion and emission characteristics of a dual fuel diesel engine with high premixed ratio of methanol (PRm) were investigated. Experiments were performed on a 6-cylinder turbocharged, inter-cooling diesel engine. Methanol was injected through the intake port and ignited by direct injected diesel in the cylinder, the maximum PRm was over 70%. The experimental results showed that with high PR...
To study the possibility of using micro-/mesoporous ZSM-5 additives to reduce phenolic compounds additional deactivation, when co-processing phenolic-rich bio-oils with traditional Fluid Catalytic Cracking (FCC) feedstocks, the transformations of methylcyclohexane, n-heptane and n-octane were carried out in presence of phenol and guaiacol over alkali-treated HZSM-5 samples, at 450°C. The results obtained...
Ignition delay times and CO, H2O, OH and CO2 time-histories were measured behind reflected shock waves for two FACE (Fuels for Advanced Combustion Engines) gasolines and one PRF (Primary Reference Fuel) blend. The FACE gasolines chosen for this work are primarily paraffinic and have the same octane rating (∼RON=84) as the PRF blend, but contain varying amounts of iso- and n-paraffins. Species time-histories...
A premixed propane/air flame stabilized on a triangular bluff body was studied by numerical simulation as a simplified model of many practical propulsion and power generation systems. The sub-grid scale (sgs) probability density function (pdf) approach in conjunction with the stochastic fields solution method is used to account for sgs turbulence–chemistry interactions; a skeleton chemistry mechanism...
Coal still remains the most plentiful and dominant fossil fuel. Coal is an inhomogeneous organic fuel formed mainly from decomposed plant matter consisting of aromatic and hydroaromatic structures joined by short aliphatic chains whereby aromaticity increases with coalification rank. The use of coal, particularly for electricity generation, is expected to continue for the foreseeable future. In this...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.