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Mathematical Modeling of Coal Bed Methane Generation. B.Nalinikant, B. Gopal Krishna, M. Jagannadha Rao. Coal-Bed Methane reservoirs have a number of unique features compared to porous or fractured gas reservoirs. Here, the paper presents 2-D mathematical model of coal bed methane generation/storage based on the theories of surface physical chemistry such as Langmuir adsorption .

Request PDF | Mathematical Modelling for Coal Fired Supercritical Power Plants and Model Parameter Identification Using Genetic Algorithms | The paper presents the progress of our study of the ...

mathematical model for low-rank coal pyrolysis. This model included the primary and secondary coal pyrolysis reactions and the char gasiﬁcation reaction with the in situ steam which resulted from both coal inherent moisture and pyrolytic water. The results showed that the char yields during pyrolysis decreased with the increase of coal inherent moisture content and the decreases of particle ...

14.06.2019 · In this study, an exploratory mathematical model for the coal conversion process in a lab-scale ISWR originally proposed and built in SKLMF would be firstly established incorporating particle-fluid flow dynamics, species transport and thermal coupling between endothermic gasification and exothermic oxidation reaction.

Cited by: 4Finally nonlinear-programming (NLP) mathematical modeling of coal blend is introduced and utilized in the Hangzhou Coal Blending Center. Predictions based on the new method resulted in different results from the ones based on LP modeling. The authors concludes that it is very important to introduce NLP modeling, instead of NL modeling, into the ...

Mathematical modelling is a predictive technology. Although the coking process is a highly developed technology', mathematical modelling can widen the scope and applicability without resorting to expensive and time consuming experimentation. Three impor tant models are considered in this paper. Model for rate of devolatilization of coal It is well known that as devolatilization takes place ...

The mathematical model of environm ental benefits and cost of coal mining discovered by Juniah (2 013), is an expansion of the extended m athematical model of the benefits and costs of Munasing he ...

mathematical model for low-rank coal pyrolysis. This model included the primary and secondary coal pyrolysis reactions and the char gasiﬁcation reaction with the in situ steam which resulted from both coal inherent moisture and pyrolytic water. The results showed that the char yields during pyrolysis decreased with the increase of coal inherent moisture content and the decreases of particle ...

Mathematical Model of Coal Mine Gas and Coal Dust Control. Article Preview. Abstract: The best is to read these instructions and follow the outline of this text. The coal mine production safety is one of China's current problems to be solved, do a good job monitoring and control of underground gas and coal dust is a key link to achieve safety in production. In this paper, the programming model ...

Mathematical modelling is a predictive technology. Although the coking process is a highly developed technology', mathematical modelling can widen the scope and applicability without resorting to expensive and time consuming experimentation. Three impor tant models are considered in this paper. Model for rate of devolatilization of coal It is well known that as devolatilization takes place ...

A new mathematical model for coal flotation kinetics DYNA, 84(203), pp. 143149, - December, 2017. ning. These efforts have experimental results is sensitive to many factors and depend on the mineral type, the equipment and the operating parameters. For that reason, there is no predominantly acceptable model in the research area [1]. Each model may be applied to the flotation of a material on ...

900 °C. In this research, it get the mathematical modeling of the coal activation process in order to predict the behavior of the gas and coal temperature distributioninside a rotary cylindrical . kiln The proposed model aims for acquiring useful information to select operating conditions and design parameters. The model groups a non-linear differential equations system, the equations to ...

(1997). Mathematical Modeling of a 2.4 MW Swirling Pulverized Coal Flame. Combustion Science and Technology: Vol. 122, No. 1-6, pp. 131-182.

mathematical model of coal pulverizer | Gulin Solutions ... mathematical model of coal pulverizer. Jul 03, 2012 - Gulin supply Mining and construction equipment for mineral handling. The crushing, screening, washing, . mathematical model of coal pulverizer - Crusher South Africa. mathematical model of a coal mill. Mathematic Modeling and Condition Monitoring of Power Station ... [8] L. Corti ...

Mathematical modeling of gasification of high-ash Indian coals in moving bed gasification system. ... Three-stage well-mixed reactor model for a pressurized coal gasifier. The Canadian Journal of Chemical Engineering 2000, 78 (1), 143-155. DOI: 10.1002/cjce.5450780119. Jicheng Bi, Chunhua Luo, Ken-ichi Aoki, Shigeyuki Uemiya, Toshinori Kojima. A numerical simulation of a jetting fluidized bed ...

The existence of the water-driven-methane effect in gassy coal has been verified by field tests and laboratory experiments. However, a water-driven-methane mathematical model that considers methane adsorption and desorption has not yet been established. Based on the water-driven-methane process, a fluid-solid coupling mathematical model of methane driven by water is established.

Mathematical model for coal conversion in supercritical water: reacting phase flow with conjugate heat transfer. International Journal of Hydrogen Energy 2018, DOI: 10.1016/j.ijhydene.2018.09.139. Jiangdong Yu, Chunyan Jiang, Qingqing Guan, Junjie Gu, Ping Ning, Rongrong Miao, Qiuling Chen, Junmin Zhang. Conversion of low-grade coals in sub-and supercritical water: A review. Fuel 2018 ...

01.09.2019 · Based on this concept a mathematical model of a gas flow in the coal where porosity and permeability are changed due to chemical reactions has been developed. Using this model we calculated gas pressure changes in the pores initiated by gas release near the working face till satisfying force and energy criteria of outburst. The simulation results demonstrated forming overpressure zone in the ...

The model considers four reaction zones, including the oxidation zone, the reduction zone, the degasification zone, and the drying zone. The reactions which take place in the various zones are discussed, taking into account the mathematical representation of the process characteristics and suitable model simplifications. Attention is given to a number of specific selected operational cases ...

@article{osti_324643, title = {Mathematical modelling of fluidized bed coal gasifiers}, author = {Yan, H M and Heidenreich, C and Zhang, D K}, abstractNote = {A steady-state isothermal model has been developed to simulate performance of bubbling fluidized-bed coal gasifiers of various scales. Building on the two-phase fluidization theory, the model considers a comprehensive chemical reaction ...

Mathematical Model of Benefits and Costs of Coal Mining Environmental Restu Juniah1, ... void mine, extended mathematical model of benefits and cost of coal mining environmental sustainability 1. Introduction The environment has three functions, as a provider of natural resources, as a carbon sink, and as an aesthetic giver (Juniah, 2018). Activites of forest area function by clearing forest ...

T1 - Mathematical models of the thermal decomposition of coal. 5. Distribution of gas flow in a coke oven charge. AU - Voller, V. R. AU - Cross, M. AU - Merrick, D. PY - 1983/5. Y1 - 1983/5. N2 - One of the main uncertainties in analysing the coking process is the path followed by the volatile gases as they leave the oven. The objective of this study was to make a first attempt at developing a ...

Mathematical modeling of gasification of high-ash Indian coals in moving bed gasification system. ... Three-stage well-mixed reactor model for a pressurized coal gasifier. The Canadian Journal of Chemical Engineering 2000, 78 (1), 143-155. DOI: 10.1002/cjce.5450780119. Jicheng Bi, Chunhua Luo, Ken-ichi Aoki, Shigeyuki Uemiya, Toshinori Kojima. A numerical simulation of a jetting fluidized bed ...

A dynamic mathematical model of an ultra-supercritical coal fired once-through boiler-turbine unit . Article (PDF Available) in Applied Energy 189:654-666 · March 2017 with 163 Reads How we ...

Mathematical model for coal conversion in supercritical water: reacting phase flow with conjugate heat transfer. International Journal of Hydrogen Energy 2018, DOI: 10.1016/j.ijhydene.2018.09.139. Jiangdong Yu, Chunyan Jiang, Qingqing Guan, Junjie Gu, Ping Ning, Rongrong Miao, Qiuling Chen, Junmin Zhang. Conversion of low-grade coals in sub-and supercritical water: A review. Fuel 2018 ...

Mathematical model for coal conversion in supercritical water: reacting phase flow with conjugate heat transfer. International Journal of Hydrogen Energy 2018, DOI: 10.1016/j.ijhydene.2018.09.139. Jiangdong Yu, Chunyan Jiang, Qingqing Guan, Junjie Gu, Ping Ning, Rongrong Miao, Qiuling Chen, Junmin Zhang. Conversion of low-grade coals in sub-and supercritical water: A review. Fuel 2018 ...

01.03.2017 · A dynamic mathematical model of an ultra-supercritical coal fired once-through boiler-turbine unit ... The lumped parameter model of the OTB unit, including the coal-pulverized system and the boiler-turbine system, is developed by means of mass and energy fundamental laws and nonlinear regression analysis in Section 2. During real operation, the parameters in model are varied with time .

The set of equations of the proposed physical & mathematical model, written for the dense, discrete, and semi-diluted phases of the fluidized bed, allows to calculate the main hydrodynamic parameters at any given level of the bed, the material balance as to the fuel and oxidizer, the amount of ...

To assist studies of the coking process, a series of mathematical models of coal carbonization has been developed. Models of the physical properties (e.g. specific heat, density, porosity and thermal conductivity) of coal during decomposition to coke were constructed in terms of the changes in the chemical composition and srructure.

presents 2-D mathematical model of coal bed methane generation/storage based on the theories of surface physical chemistry such as Langmuir adsorption isotherm. In this paper, Gibbs isotherm, Langmuir adsorption isotherm, porosity and surface excess are used to derive a formula which is helpful in simulating the generation of Methane adsorbed by coal beds in a real time scenario by assuming ...