spontaneous combustion and coal petrology
Effect of injection timing on combustion and performance of a direct injection diesel engine running on Jatropha methyl ester
Ngày tải lên :
05/09/2013, 16:11
... independent variables (load and injection timing) and dependent variables are shown in the Figures and the overall effects of injection timing on combustion, engine performance and emissions are discussed ... injection timing plays crucial role in start of combustion and quality of combustion, the effects of varying the timing were studied for both –advancement and –retardation For changing the injection ... measurements, process indicator and engine indicator Provision is also made for online measurement of temperature of -exhaust, -cooling water and -calorimeter water inlet and outlet and load on the engine...
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Tài liệu Age-related changes of the dental aesthetic zone at rest and during spontaneous smiling and speech pptx
Ngày tải lên :
19/02/2014, 17:20
... the spontaneous smiling and speech records, the display of teeth and gingiva was measured In the maxilla and mandible, a central and lateral incisor, a canine, a first and second premolar, and ... Subjects and methods Recording and measurement during spontaneous smiling, speech, and at rest A digital videographic measurement method was used to capture records of a spontaneous smile of joy and ... 35–40 years, and 50–55 years) Selection criteria were full maxillary and mandibular dental arches up to and including the first molar, Caucasian, no excessive facial disharmonies, and no visible...
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AIR POLLUTION AND COAL FIRED POWER PLANTS potx
Ngày tải lên :
06/03/2014, 19:20
... The country has abundant reserves of coal, which are estimated to be 50 billion tonnes, and depends on coal as the cheap source of energy and heat The annual coal consumption has being increased ... Policy documents and legal environment National standards • Air Quality Standard, MNS 4585:1995, 2007 • Exhaust gases emitted from vehicles - Diesel - Gasoline vehicles • Fuel standards - Diesel ... by wt % by wt % by wt % by wt Shariin Col Coal 42 4375 49.2 2.2 8.0 0.9 0.5 18 21.5 Baganuur Coal 42 3550 39.3 2.5 9.8 0.5 0.4 33 14.5 Policy documents and legal environment Policy documents •...
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A White Paper Describing Produced Water from Production of Crude Oil, Natural Gas, and Coal Bed Methane pot
Ngày tải lên :
09/03/2014, 01:20
... constituents and other characteristics of the constituents such as toxicity, bioavailability, and form Actual fate and effects vary with volume and composition of the discharge and the hydrologic and ... depositional environment, depth of burial, and coal type (Jackson and Myers 2002), and it varies significantly across production areas As CBM production increases and more water is produced, concern ... liposolubility and poor water solubility They increase biological oxygen demand, are highly toxic to aquatic organisms, and can be carcinogenic to man and animals All are mutagenic and harmful to...
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Spontaneous growth and luminescence of si siox core shell nanowires
Ngày tải lên :
16/03/2014, 15:08
... annealing and (b) after annealing two emission bands around 550 and 600 nm, as indicated in Fig 5a Each nanowire consists of a crystalline Si core and an amorphous SiOx shell The core and shell ... Si nanoparticle chains and Sample A showing twisted shapes and rough surfaces (b) Magnified TEM image and SAED pattern for the Si nanoparticle chain (c) Magnified TEM image and SAED pattern for Sample ... products) are found to coexist with the nanowires, and some of them self-assemble together and appear in the form of short chain Further magnified TEM images and SAED on individual nanowires provide further...
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Combustion and emission characteristics of a natural gas fueled diesel engine with EGR
Ngày tải lên :
15/06/2014, 09:26
... and heat release rate 4.1.1 In-cylinder pressure and ignition delay Figs and show the pressure–crank angle degree (CAD) diagram for both conventional diesel and plain dual-fuel modes at 52% and ... other side, dual-fuel combustion is characterized by the presence of two combustion configurations; typically, non-premixed combustion of the pilot diesel, and premixed combustion of the gaseous ... and dual-fuel with EGR, at different operating conditions Detailed results are given for combustion characteristics, engine performance, and exhaust emission analysis Experimental apparatus and...
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Báo cáo y học: "Evaluating movement disorders in pediatric patients receiving risperidone: a comparison of spontaneous reports and research criteria for TD" pot
Ngày tải lên :
13/08/2014, 18:21
... with an IQ of ≥ 36 and ≤ 84; and a Vineland Adaptive Behavior Scale score ≤ 84 [25] Subjects had to be healthy, and aged between and 12 years (extension studies) or between and 14 years (separate ... amphetamines, and lithium The identification and classification of MDs generally, and drug-induced movement disorders specifically, is quite complex Although subjective methods (ie spontaneous ... chloral hydrate, and melatonin), and anticholinergic medication for any extrapyramidal symptoms arising during the study Measures Efficacy and safety assessments were completed and have been detailed...
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Combustion and energy transport in the micro scale
Ngày tải lên :
14/09/2015, 14:05
... Summary Summary Micro-scale combustion offers both theoretical and practical challenges in relation to micro power generation systems Therefore, the understanding of combustion and energy transport ... The developed 2D numerical model (Chapters and 4) and 1D theoretical model (Chapter 5) served as the basis for the understanding of the premixed flames and heat transport in micro-combustors With ... source and an emitter For this particular configuration, the effects of combustor dimensions (combustor length, combustor diameter and step height) and flow conditions (flow velocity and fuel-air...
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Thermal combustion and oxygen chemisorption of wood exposed to low temperature long term heating 1
Ngày tải lên :
14/09/2015, 14:14
... through solid and convective heat loss from the surface Walker (1967) introduced the notions of dry combustion and wet combustion in the context of spontaneous combustion of solids Dry combustion ... oxidizable materials such as coal (Wang, Dlugogorski and Kennedy 2002, Wang, Dlugogorski and Kennedy 2003b), charcoal (Yu and Sotirchos 1987), hay (Rothbaum 1963) and wool (Dye and Rothbaum 1964) react ... propensity of coals to combust spontaneously is underscored by their chemical composition such as the rank of coal and the percentage of fixed carbon, and enhanced by high porosity and hygroscopic...
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Thermal combustion and oxygen chemisorption of wood exposed to low temperature long term heating 2
Ngày tải lên :
14/09/2015, 14:14
... approach and the evaporation temperature approach are also discussed 2.1 Reviews of physical and chemical studies in wood combustion Combustion is a complex problem involving solid-phase and gas-phase ... cracks and fissures at the char surface, since high-temperature drying occurs just incipient of or in tandem with flaming combustion The formation of cracks and fissures greatly affects the heat and ... Ross and Sood 1978, Tabatabaie-Raissi, Mok and Antal 1989, Antal, Friedman and Rogers 1980), others have employed fluidized bed reactors (Barooah and Long 1976), a tube furnace (Min 1977) and...
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Thermal combustion and oxygen chemisorption of wood exposed to low temperature long term heating 3
Ngày tải lên :
14/09/2015, 14:14
... formation, are negligible during drying Liquid and gaseous transport is dominant and responsible for internal heat transfer, through diffusion and convection Pyrolysis is negligible at low temperature ... liquid and vapour transport In this work, a combined moisture flow of liquid and vapour is introduced for the second porous model when the internal evaporation is considered Other than simplicity and ... ) ∂t ∂x ∂x ∂x (3.17) The initial and boundary equations for the respective energy and mass balance are the same as that outlined in Equations (3.10) to (3.15), and will not be repeated here 3.1.4...
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Thermal combustion and oxygen chemisorption of wood exposed to low temperature long term heating 4
Ngày tải lên :
14/09/2015, 14:14
... Chapter 4: Spontaneous Heating and Cone Calorimeter Ignition Tests and Experiments The surface temperatures and time to ignition collected for piloted and spontaneous ... definition of z and that of Equation (4.7), correspond to 74 Chapter 4: Spontaneous Heating and Cone Calorimeter Ignition Tests and Experiments = ∇θ = and θs (4.7) ... critical size relating to spontaneous combustion for a given wood slab, and/ or its associated kinetic parameters, the crossing point method (Chen and Chong 1995, Chen and Chong 1998) or simply...
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Thermal combustion and oxygen chemisorption of wood exposed to low temperature long term heating 5
Ngày tải lên :
14/09/2015, 14:14
... characteristic bands measured around 3500 cm-1 and 1630 cm-1 are ascribed to atmospheric water vapors and the bands at 2350 cm-1 and 667 cm-1 are attributed to carbon dioxide (Hshieh and Richards ... chemisorption for carbonized char (Carpenter and Giddings 1964, Carpenter and Sergeant 1966, Harris and Evans 1975, Sevenster 1961, Suuberg, Wojtowicz and Calo 1989, Khan et al 1990) In this study, ... reactive sites per unit surface area, and the area have the same distribution activity (Carpenter and Giddings 1964, Carpenter and Sergeant 1966, Bansal, Vastola and Walker 1970) The fact that the...
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Thermal combustion and oxygen chemisorption of wood exposed to low temperature long term heating 6
Ngày tải lên :
14/09/2015, 14:14
... correlation 158 Chapter 6: Results Analysis and Discussion _ 6.2 Heat and mass transfer in porous slab Self-heating and spontaneous combustion of wood was studied using ... between the simulated and the calculated values, and relatively closer fit of surface temperatures between those calculated and measured data 139 Chapter 6: Results Analysis and Discussion ... analyse spontaneous ignition of green wood, mass transfer such as moisture migration would have to be included (Sahota and Pagni 1979, Plumb, Spolek and Olmstead 1985, Fredlund 1988, Lianbai and...
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Thermal combustion and oxygen chemisorption of wood exposed to low temperature long term heating 7
Ngày tải lên :
14/09/2015, 14:14
... chars and that of the more mature and graphitic carbon chars Different theoretical models are needed to understand chemisorption and combustion behaviours of cellulosic wood chars from coal chars ... self-heating and spontaneous combustion of low-temperature, long-term preheated wood, targeted to minimize unwanted fires arising from the wood structures and construction in historical and modern ... thermal combustion Thermal combustion, introduced by the Russian school (Zeldovich and FrankKamenetskii 1938, Frank-Kamenetskii 1969) which has been systematically adopted in the study of spontaneous...
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Definition of coal and coal mining
Ngày tải lên :
10/06/2016, 15:46
... sulfur and attach themselves to coal Coal acts like a sponge in groundwater and adsorbs like a charcoal filter Much of the world’s coal contains hazardous concentrations of mercury and sulfur Coal- fired ... to over The coalification process from swamp to hundreds of feet thick Over geologic time, sand coal Note how a thick section of peat is compressed by heat and pressure into a thin and clay sediments ... initiated by igneous intrusive activity and deep-seated uplift Tertiary-age uplifts and intrusions into the coal- bearing rocks affected the coal beds Generally, these coal beds were thermally cooked,...
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Báo cáo y học: "Differential gene expression in HIV/SIV-associated and spontaneous lymphomas"
Ngày tải lên :
02/11/2012, 11:08
... levels of the set, ND4, and SMG-1 genes in human spontaneous lymphomas and normal B- and Tlymphocytes (a) 32P-labeled PCR-fragments of the set and a-myb oncogenes, and ND4, pub and capn4 genes were ... normal human T-lymphocytes and the Jurkat T-cell line Expression of set, SMG-1, and ND4 was unchanged, and pub and a-myb were not transcribed in normal human T-lymphocytes and the Jurkat cells (data ... (capn4) and other (in case of lymphoma h1) and SMG-1, the gene of ribosomal protein S8 (in case of lymphoma h2), as well as several genes of unknown function (9 and in the case of lymphoma h1 and...
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Experimental investigations and CFD study of temperature distribution during oscillating combustion in a crucible furnace
Ngày tải lên :
05/09/2013, 14:59
... mode • During the oscillating combustion mode, the combustion process was extended over a larger volume in the furnace with fuel-rich and fuel-lean zones of combustion and subsequent mixing results ... plant, and National Project with participation of BHEL and BARC of DAE For 23 years in BHEL served in different Engineering areas and R&D His main areas of interest are combustion, gasification and ... by Launder and Spalding and J.S.Woo, J Szekey et al [13] Robustness, economy, and reasonable accuracy for a wide range of turbulent flows explain its popularity in industrial flow and heat transfer...
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Effect of unsaturated fatty acid esters of biodiesel fuels on combustion, performance and emission characteristics of a DI diesel engine
Ngày tải lên :
05/09/2013, 15:28
... premixed and diffusion combustion in total combustion duration for different biodiesel fuels are listed in Table Table Percentage contribution of premixed and diffusion combustion in total combustion ... Energy and Environment (IJEE), Volume 1, Issue 3, 2010, pp.411-430 421 % of Premixed combustion % of Diffusion combustion Trend line of % of diffusion combustion Trend line of % of premixed combustion ... and the product was allowed to settle in two layers The upper layer consisted of ester and alcohol and was separated from the bottom layer (glycerin) The upper layer was distilled to remove and...
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