Ignition mechanism and characteristics of gel fuels based on oil-free and oil-filled cryogels with fine coal particles

Glushkov, Dmitrii O.; Кузнецов, Г. В.; Nigay, A.G.; Yanovsky, Vyacheslav; Yashutina, Olga S.

doi:10.1016/j.powtec.2019.09.081

Cited by 16 publications

(5 citation statements)

References 30 publications

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“…The process of the mixture ignition can be divided into several stages. 62 The first stage is the time of essentially inert heating of the fuel droplet. In the second stage, the process of intensive evaporation of isopropyl alcohol, formation of volatile substances of coal pyrolysis products, and formation of a mixture of combustible gases occur.…”

Section: Results Of Ignition Experimentsmentioning

confidence: 99%

“…The reason for a significant decrease (by 43%‐46%) in the ignition delay time, in the studied temperature range of the oxidizer, is the dominant role of alcohol in the process of starting gas‐phase combustion. The process of the mixture ignition can be divided into several stages 62 . The first stage is the time of essentially inert heating of the fuel droplet.…”

Section: Methodsmentioning

confidence: 99%

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Ignition of coal‐water fuel droplets with addition of isopropyl alcohol

2020

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Coal-water fuels have been actively studied in the last decade due to the fact that when they are burned in the furnaces of steam and hot-water boilers, much less anthropogenic oxides of sulfur, nitrogen, and carbon are formed in comparison with coal. The main problem that hinders the widespread introduction of such fuels in the energy sector is long (up to 30 seconds) ignition delay times. Significant (10%-50%) reduction in the ignition delay time is possi

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Section: Results Of Ignition Experimentsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Ignition of coal‐water fuel droplets with addition of isopropyl alcohol

2020

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“…Figure 5 shows the results (video frames) of experimental studies on ignition and combustion of single liquid hydrocarbon droplets at 700 °C. The process of ignition and combustion of the studied hydrocarbons could be divided into several stages as it was done in [40]. The first stage was the inert heating of a single droplet.…”

Section: Droplet Ignition and Combustion Of Liquid Hydrocarbonsmentioning

confidence: 99%

“…Thus, the intense heating of sample with the characteristic initial size (D=1.5 mm) begins after its introduction to the thermoregulated furnace. Then the components of hydrocarbons [40] start to evaporate from the near-surface layers of the droplet. The transformation of the droplet surface, change in its size along the longitudinal and transverse coordinates as well as change of its appearance (transition from "glossy" to "matte") identify this stage.…”

Section: Droplet Ignition and Combustion Of Liquid Hydrocarbonsmentioning

confidence: 99%

Liquid Hydrocarbons Production by the Steam Gasification of Used Tires: Energy Characteristics and Environmental Sustainability

Ларионов¹,

Slyusarskiy²,

Kirgina³

et al. 2021

Preprint

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The technical characteristics of liquid hydrocarbons obtained by steam gasification of the recycled automobile tires were studied as well as the features of their combustion process. Steam gasification of grinded tires was carried out in a tubular reactor using superheated steam with 500°C temperature and 5 kg/h mass flow rate. The obtained characteristics were compared with a traditional liquid fuel oil. The technical characteristics were determined via the standard analytical methods. An ignition and a combustion of liquid hydrocarbon samples were carried out in the combustion chamber at different temperatures of heating medium Tg = 450–700°C. Gas-phase combustion products were analyzed using a flow-through gas analyzer. It was found that liquid hydrocarbons were characterized by a low pour point (-43°C – (-52) °C) and comparable to calorific value of traditional fuel oil (40.56–43.3 MJ/kg). In addition, the studied samples of liquid hydrocarbons were characterized by a lower ignition delay time (by 56 %, on average) and flame burning time (by 30 %, on average). Combustion process of the studied samples (including traditional fuel oil) was accompanied by the formation of micro-explosions.

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“…Of course, these areas do not at all embrace the exhaustive list of the examples that are reported in the experimental papers and patents dealing with the successful implementation of the various cryogenically-structured polymeric matrices. For instance, such interesting cryogel-based items as the materials for cleaning and restoration of old and modern artworks [ 151 , 152 , 153 ] or such exotic uses of the cryostructuring technique as the fabrication of fuel briquettes and gel fuels [ 154 , 155 , 156 , 157 ] can be mentioned.…”

Section: Introductionmentioning

confidence: 99%

Cryostructuring of Polymeric Systems. 55. Retrospective View on the More than 40 Years of Studies Performed in the A.N.Nesmeyanov Institute of Organoelement Compounds with Respect of the Cryostructuring Processes in Polymeric Systems

Lozinsky

2020

Gels

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The processes of cryostructuring in polymeric systems, the techniques of the preparation of diverse cryogels and cryostructurates, the physico-chemical mechanisms of their formation, and the applied potential of these advanced polymer materials are all of high scientific and practical interest in many countries. This review article describes and discusses the results of more than 40 years of studies in this field performed by the researchers from the A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences—one of the key centers, where such investigations are carried out. The review includes brief historical information, the description of the main effects and trends characteristic of the cryostructuring processes, the data on the morphological specifics inherent in the polymeric cryogels and cryostructurates, and examples of their implementation for solving certain applied tasks.

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Ignition mechanism and characteristics of gel fuels based on oil-free and oil-filled cryogels with fine coal particles

Cited by 16 publications

References 30 publications

Ignition of coal‐water fuel droplets with addition of isopropyl alcohol

Ignition of coal‐water fuel droplets with addition of isopropyl alcohol

Liquid Hydrocarbons Production by the Steam Gasification of Used Tires: Energy Characteristics and Environmental Sustainability

Cryostructuring of Polymeric Systems. 55. Retrospective View on the More than 40 Years of Studies Performed in the A.N.Nesmeyanov Institute of Organoelement Compounds with Respect of the Cryostructuring Processes in Polymeric Systems

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