The energy technological background of involving salty coals into energy balance of Ukraine. 2. Natural minerals as catalysts of thermochemical conversion of salty coals in various conditions
Year: 2019
Type: article
Abstract: The eNerGy TechNoloGicAl bAcKGrouND of iNVolViNG SAlTy coAlS iNTo eNerGy bAlANce of uKrAiNe. 2. NATurAl miNerAlS AS cATAlySTS of ThermochemicAl coNVerSioN of SAlTy coAlS iN VAriouS coNDiTioNSSalt coal (SC) of the Northern Donbas in the list of nonproject fuels is a perspective source of energy in Ukraine under the conditions of occurrence and reserves.This is due to its relatively high energy (fuel) characteristics and the presence in its compo sition of the natural catalytic complex the increased content of salts of alkali and alkaline earth metals and trace elements.These impurities, on the one hand, can lead to some burning problems, but can also have a positive effect when such coal in mixtures with other less reactional fuels is used.Purpose.Determination of the influence of watersoluble compounds (chlorides and sulphates of sodium, calcium, magne sium, etc.) on the thermolysis (combustion) processes of salt coal of Bohdanivsk deposit (the Northern Donbas) at different tem peratures.methodology.Samples of desalted coal were obtained using previously optimized parameters of the process aqueous extraction (time, temperature, and solid to liquid phase ratio).The elemental composition and technical characteristics of coal are deter mined by appropriate standard methods.The dynamics of gas emission and combustion of coke residues of salty and desalted coal was determined using the "Pyrolysis M" installation.The MX1215 mass spectrometer was used as a gas analyzer.The kinetic parameters of the process were calculated based on the Arrhenius law.findings.The changes in the elemental composition of the organic mass of coal (OMC) occurring during the purification of salty coal by water extraction are determined.Experimental studies have been conducted on the combustion of salty and desalted coal of the Bohdanivsk deposit in the temperature range of 550-850 o С.It has been determined that native watersoluble minerals of salty coal lead to intensification of ignition processes, accelerated yield of gaseous products (H 2 , CO, CO 2 ) and changes in the gas content ratio.The activation energy of combustion coke residual salty and desalted coal has been determined.originality.Some characteristics of combustion of salty and desalted coal are compared.It is shown that aqueous extraction of salty coal leads to improvement of the fuel and energy characteristics.It is established that salts of alkali and alkaline earth metals, which are a part of salty coal, are natural catalysts for the processes of thermolysis and burning of organic mass of coal.It is deter mined that in the temperature range of 550-850 о С, depending on the fractional composition of the sample, the watersoluble salt complex accelerates the emission (elimination) of hydrogen by 3-4 times, carbon monoxide by 2-3.5 times, carbon dioxide by 2.5 to 3 times. Practical value.The study shows the prospect of involving salt coal to the fuel base of Ukraine, not only as a separate fuel, while reducing the concentration of harmful impurities (by water extraction), and as a component of blended fuels to increase the reac tivity of composite fuel raw materials.
Authors: A.I. Fateyev, T.G. Shendrik, N.I. Dunayevska
Institution: National Academy of Sciences of Ukraine
Language: English
Subfield: Fuel Technology
Field: Energy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2997743369