Mathematical Modeling and Simulation of Fluidized Bed Gasifier: Application to Indian Coal

Document Type : Research Article

Authors

1 Department of Chemical Engineering, Sant Longowal Institute of Engineering & Technology Longowal, Sangrur-148106, Punjab, INDIA

2 Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee – 247667, Uttarakhand, INDIA

Abstract

An Eulerian–Eulerian-based two-dimensional mathematical modeling approach for bubbling fluidized bed gasifier using FLUENT has been proposed to transfer energy, momentum, and mass between two phases namely solid and gas together with the application of the kinetic theory of solid particle flow. The modeling equation involves eight homogeneous and five heterogeneous reactions kinetics. The eddy dissipation model of FLUENT has been used to incorporate homogeneous reaction kinetics and a user-defined code has been developed that describes the kinetics of heterogeneous reactions. The simulation result shows that the exit syngas composition is in line with the experimental one and has a maximum error of around 4.05% for CO and 2.68% for hydrogen. This model has been used to study the variation in hydrogen concentration in the syngas to maximize hydrogen production based on different operating and design parameters.

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References

[1] Web1 http://www.aspousa.org/index.php/peak-oil-reference/peak-oil-data/(2013, April).
[2] Chavan P., Datta S., Saha S., Sahu G., Sharma T., Influence of High Ash Indian Coals in Fluidized Bed Gasification Under Different Operating Conditions, Solid Fuel Chem.,46: 108-113 (2011).
[3] Web2. http://www.fossil.energy.gov/programs/ powersystems/gasification/(2013, April)
[4] Cornejo P., Farias O., Mathematical Modeling of Coal Gasification in a Fluidized Bed Reactor Using a Eulerian Granular Description, Int. J. Chem. React. Eng.,9 Article A2: 1-30 (2011).
[5] Yu L., Lu J., Zhang X., Zhang S., Numerical Simulation of Bubbling Fluidized Bed Coal Gasification by the Kinetic Theory of Granular Flow, Fuel,86: 722-734 (2007).
[6] Chang H., Xiao F., Chu K.H., Li A., Liu Y., Industrial-scale Fixed-bed Coal Gasification: Modeling, Simulation and Thermodynamic Analysis, Chin. J. Chem. Eng.,22: 522-530 (2014).
[7] Chatterjee P.K., Datta A.B., Kundu K.M., Fluidized Bed Gasification of Coal, Can. J. Chem. Eng.,73: 204-221 (1993).
[8] Kim Y.J, Lee, J.M., Kim, S. D., Modeling of Coal Gasification in an Internally Circulating Fluidized Bed Reactor with Draught Tube, Fuel,79: 69-77(2000).
[9] Maurer R., Industrial Fixed-Bed Coal Gasification: An Economic Alternative to Deregulated Natural Gas, SAE Technical Paper, 810995 (1981).
[10] Zhang Y., Zheng Y., Co-Gasification of Coal and Biomass in a Fixed Bed Reactor with Separate and Mixed Bed Configurations, Fuel,183: 132-138 (2016).
[11] Chejne F., Hernandez J.P., Modeling and Simulation of Coal Gasification Process in Fluidized Bed,Fuel,81: 1687-1702 (2002).
[12] Gera D., Gautam M., Tsuji Y., Kawaguchi T., Tanaka T., Computer Simulation of Bubbles in Large Particle Fluidized Beds, Powder Tech.,98: 38-47 (1998).
[13] Hamel S., Krumn W., Mathematical Modeling and Simulation of Bubbling Fluidized Bed Gasifiers, Powder Tech.,120: 105-112 (2001).
[14] Ross D.P., Yan H.M., Zhong Z., Zhang D.K., A Non-Isothermal Model of a Bubbling Fluidized Bed Coal Gasifier, Fuel,84: 1469-1481 (2005).
[15] Xie J., Zhong W., Jin B., Shao Y., Huang Y., Eulerian- Lagrangian method for Three-Dimensional Simulation of Fluidized Bed Coal Gasification, Adv. powder Tech.,24: 382-392 (2013).
[16] Yan H.M., Heidenreich C., Zhang D.K., Mathematical Modeling of a Bubbling Fluidized Bed Coal Gasifier and the Significance of Net Flow, Fuel,77: 1067-1079 (1998).
[17] Robert P.M.A., Richard M.F., James K.F., Modeling of Pilot Scale Fluidized Bed Coal Gasification Reactor, Fuel Proc. Tech.,19: 265-290 (1988).
[18] Wen C.Y., Yu Y.H., Mechanics of Fluidization, Chem. Eng. Prog. Symp. Series,62: 100–11 (1966).  
[19] De Souza-Santos M.L., Comprehensive Modeling and Simulation of fluidized Bed Boilers and Gasifiers,Fuel,68: 1507–21 (1989).
[20] Chen G., Spliethoff H., Andries J., Glazer M., Biomass Gasification in a Circulating Fluidized Bed Part I: Preliminary Experiments and Modeling Developments, Energy Sources,26: 485-498 (2004).
[21] Singh G.K., Mohanty B., Mondal P., Chavan P., Datta S., Modeling and Simulation of a Pilot-Scale Bubbling Fluidized Bed Gasifier for the Gasification of High Ash Indian Coal Using Eulerian-Granular Approach, Int. J. Chem. Reac. Eng.,14: 417–431 (2016).
[22] Gil J., Aznar M.P., Caballero M.A., Frances E., Corella J., Biomass Gasification in Fluidized Bed at Pilot Scale with Steam Oxygen Mixture. Product Distribution for Very Different Operating Conditions, Energy and Fuels,11: 1109-1118 (1996).
[23] Xiao R., Zhang M., Jin B., Huang Y., High Temperature Air/Steam Blown Gasification of Coal in a Pressurized Spout Fluid Bed, Energy Fuels,20: 715-720 (2006).
Iranian Journal of Chemistry and Chemical Engineering
Volume 42, Issue 1 - Serial Number 123
January 2023
Pages 269-285

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