Thermal dissolution of solid fossil fuels

Gorlov, E. G.

doi:10.3103/s0361521907050047

Cited by 18 publications

(6 citation statements)

References 2 publications

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“…We prepared the CWSP suspensions using a MPW-324 homogenizer (mixer). At the first stage, we prepared an oil–water emulsion, according to the recommendations of studies. − The components were weighed on a ViBRA HT 84RCE analytical balance to control the relative mass concentration of the components. Then, they were added to a homogenizer glass (capacity of 0.25 L) to be mixed for 3 min.…”

Section: Preparation Of Cwspmentioning

confidence: 99%

Ignition of the Coal–Water Slurry Containing Petrochemicals and Charcoal

2016

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The lack of effective technologies to use coal processing waste and waste flammable liquids is a major research and development problem. To address this problem, we study the ignition characteristics and conditions for coal–water slurries (CWS) based on these wastes. The key challenge posed by the wastes under study is their poor reactivity (they require more power resources for sustainable ignition). Therefore, this paper suggests adding a highly reactive material (charcoal) in a low concentration to coal–water-slurry containing petrochemicals (CWSP) based on wastes. Individual CWSP droplets are studied in a model combustion chamber. The integral characteristics of the processes under study (ignition delay time and minimum oxidizer temperatures sufficient for ignition) are determined for a CWSP droplet of 0.5–2 mm in radius fixed at the junction of a low-inertia thermocouple using a high-speed (up to 105 fps) video camera and Tema Automotive software. We compare the ignition characteristics of CWSP compositions based on charcoal and brown coal as well as filter cakes (processing waste) of coking, low-caking, and non-baking coals in an oxidizer flow (temperature of 600–1000 K and velocity of 0.5–5 m/s). Charcoal is a promising additional component for the CWS and CWSP. In view of ecological, economic, and energy-related aspects, it is advisible to use charcoal as an additive to intensify the CWS and CWSP ignition. Even a small addition (within 10–15% in relative mass concentration) of this component may significantly reduce the limit (minimum) temperature of sustainable ignition and ignition delay time (inertia).

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Section: Preparation Of Cwspmentioning

confidence: 99%

Ignition of the Coal–Water Slurry Containing Petrochemicals and Charcoal

2016

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“…To remove shale oil from oil shales, it is imperative to decompose the insoluble organic matter with heat. This is achieved by thermal dissolution, hydrogenation or pyrolysis [11][12][13]. The three methods require very high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Production from Unconventional Petroleum Reservoirs: Précis of Stimulation Techniques and Fluid Systems

Eshiet¹

2022

Emerging Technologies in Hydraulic Fracturing and Gas Flow Modelling

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An overview of the different categories of unconventional oil and gas reservoirs, and corresponding stimulation techniques appropriate for them is examined. Three main groups of unconventional oil and gas formations are appraised: heavy oil, oil shale and tight reservoirs. The scope of stimulation methods applicable to heavy oil reservoirs is limited. This kind of formation contains characteristic high-viscous hydrocarbons and are produced majorly by cold production and thermal stimulation. On the other hand, a wider range of stimulation methods are successfully used to produce tight and oil shales formations. For oil shales, these include drilling horizontal wells as substitutes to vertical wells, hydraulic fracturing, surfactant treatment, water imbibition, thermal treatment and acidisation; whilst for tight formations, these include hydraulic fracturing, surfactant treatment, water imbibition, acidisation and the application of electro-kinetics. Fracturing fluid systems are integral to the implementation of most stimulation operations and are evaluated herein under the following groups: water-based, oil-based, foam-based and acid-based. The most commonly used fracturing fluids are water based, albeit there are several instances where other types of fluids or combination of fluids are more suitable based on factors such as formation sensitivity, costs, wettability, rock solubility, surface tension, capillarity, viscosity, density, rheology and reactivity.

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“…The technologies of production, transport and combustion of coal-water slurries (CWSs) [1] and coal-water slurries containing petrochemicals (CWSPs) [2][3][4] are urgent and modern direction of development of thermal power industry. CWS is a composite fuel that has two main components -coal (or wastes of coal processing) and water.…”

Section: Introductionmentioning

confidence: 99%

“…These wastes pose a significant environmental risk, and their storage requires considerable expenses. For preparing various compositions of CWSPs [2][3][4] the wastes of oil production and refining, pyrolysis pitches of various industries, waste motor, transformer, turbine oils and other liquid organic wastes can be used. Liquid fuel components are applied in a composition of fuel slurry as for changing the ignition and combustion characteristics, and as a plasticizing and stabilizing additive.…”

Section: Introductionmentioning

confidence: 99%

Integral Characteristics of Stability of Coal-Water Slurries and Coal-Water Slurries Containing Petrochemicals By Evaluation of Separation Into Layers

et al. 2016

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Abstract. For wide use of coal and oil processing wastes in heat power industry we investigated the structural stability of coal-water slurries (CWS) and coal-water slurries containing petrochemicals (CWSP). Three methods of evaluating slurry stability were considered. The method of evaluation of separation (into layers) of the slurry was chosen to determine the stability of fuel compositions based on bituminous and brown coal, filter cakes of bituminous coals, waste motor, turbine, transformer, compressor oils, oil, oiled mixture and mazut. The experiments shown, that the addition of waste oils (with mass fraction of 10 %) to investigated fuel compositions leads to increase of slurry segmental stability is almost by 2 times.

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Thermal dissolution of solid fossil fuels

Cited by 18 publications

References 2 publications

Ignition of the Coal–Water Slurry Containing Petrochemicals and Charcoal

Ignition of the Coal–Water Slurry Containing Petrochemicals and Charcoal

Production from Unconventional Petroleum Reservoirs: Précis of Stimulation Techniques and Fluid Systems

Integral Characteristics of Stability of Coal-Water Slurries and Coal-Water Slurries Containing Petrochemicals By Evaluation of Separation Into Layers

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