A coupled electromagnetic irradiation, heat and mass transfer model for microwave heating and its numerical simulation on coal

Abstract As hydraulic fracturing as a means to enhance coal bed methane was banned in some countries due to possible negative environmental impacts, the microwave heating was proposed as an alternative approach to enhance coal permeability and thus gas productivity. One of the mechanisms on improving coal permeability using microwave irradiation is that thermal stress caused by microwave heating generates fractures. To study the influence of microwave settings to the heating effect of coal samples, a coupled mathematical model for electromagnetic, heat and mass transfer in the process of microwave heating is proposed and is numerically implemented using a finite element method. This coupled model for microwave heating have considered heat and mass transfer, and is validated by comparison with experimental results. Then it is used to simulate the influence of frequency, power and moisture capacity on microwave heating. The simulation results show that microwave heating of coal is highly sensitive to excitation frequency. Frequencies around 3.45 GHz contribute to significant thermal heterogeneity. With the same energy input, different powers do not influence the overall heating effect, but higher powers cause greater thermal heterogeneity. Moisture capacity also has great effect on microwave heating and thermal distribution pattern. Under 2.45 GHz and 1.0 kW, the coal sample with moisture capacity of 5% has the best microwave heating effect.

[1]  F. Hassani,et al.  The influence of microwave irradiation on thermal properties of main rock-forming minerals , 2017 .

[2]  R. Rezaee,et al.  Preliminary study of improving reservoir quality of tight gas sands in the near wellbore region by microwave heating , 2016 .

[3]  Farid Nasir Ani,et al.  A review on microwave assisted pyrolysis of coal and biomass for fuel production , 2014 .

[4]  F. E. Vermeulen,et al.  Electromagnetic Techniques in the In-Situ Recovery of Heavy Oils , 1983 .

[5]  He Li,et al.  The influence of microwave irradiation on petrophysical characteristics of coal cores — implications from nuclear magnetic resonance , 2016 .

[7]  Cong Lu,et al.  Numerical investigation of hydraulic fracture propagation in a layered reservoir using the cohesive zone method , 2017 .

[8]  B. Marks,et al.  Modeling coupled heat and mass transfer for convection cooking of chicken patties , 1999 .

[9]  Baiquan Lin,et al.  Three-dimensional simulation of microwave heating coal sample with varying parameters , 2016 .

[10]  N. Rowson,et al.  The effect of microwave radiation on coal grindability , 2000 .

[11]  N. J. Miles,et al.  Microwave heating applications in environmental engineering—a review , 2002 .

[12]  R. Bustin,et al.  Geological controls on coalbed methane reservoir capacity and gas content , 1998 .

[13]  Andrew Burnham,et al.  Hydraulic Fracturing and Shale Gas Production: Technology, Impacts, and Policy , 2012 .

[14]  James F. Lea,et al.  COAL BED METHANE , 2008 .

[15]  R. Trexler,et al.  Modified Lipid Extraction Methods for Deep Subsurface Shale , 2017, Front. Microbiol..

[16]  D Creedy,et al.  Coalbed methane extraction and utilization , 2003 .

[17]  P. Ranjith,et al.  Gas Transportation and Enhanced Coalbed Methane Recovery Processes in Deep Coal Seams: A Review , 2016 .

[18]  Liangcai Fang,et al.  Stress relief coalbed methane drainage by surface vertical wells in China , 2010 .

[19]  L. Zhizhong,et al.  Dielectric characterization of Indonesian low-rank coal for microwave processing , 2017 .

[20]  D. Clark,et al.  Microwave Processing of Materials , 1996 .

[21]  Sam Kingman,et al.  Recent developments in microwave processing of minerals , 2006 .

[22]  M. Noaparast,et al.  Evaluation of microwave treatment on coal structure and sulfur species by reductive pyrolysis-mass spectrometry method , 2015 .

[23]  E. Lester,et al.  Factors affecting the microwave coking of coals and the implications on microwave cavity design , 2014 .

[24]  Chunshan Zheng,et al.  Experimental study on the petrophysical variation of different rank coals with microwave treatment , 2016 .

[25]  Arash Tahmasebi,et al.  Experimental study on microwave drying of Chinese and Indonesian low-rank coals , 2011 .

[26]  Jingcheng Zhang.  Numerical simulation of hydraulic fracturing coalbed methane reservoir , 2014 .

[27]  Vladimir Jokovic.  Microwave processing of minerals , 2012 .

[28]  T. Uslu,et al.  Microwave heating of coal for enhanced magnetic removal of pyrite , 2004 .

[29]  R. Mat,et al.  Fuel production from microwave assisted pyrolysis of coal with carbon surfaces , 2016 .

[30]  Jie-Feng Zhu,et al.  Pore structure and fractal analysis of Ximeng lignite under microwave irradiation , 2015 .

[31]  J. Pereira,et al.  Simulation and uncertainty quantification in high temperature microwave heating , 2014 .

[32]  K. E. Haque,et al.  Microwave energy for mineral treatment processes—a brief review , 1999 .

[33]  M. A. Carrizales.  Recovery of stranded heavy oil by electromagnetic heating , 2010 .

[34]  Jianchun Guo,et al.  Composite linear flow model for multi-fractured horizontal wells in heterogeneous shale reservoir , 2017 .

[35]  David Jones,et al.  Modeling microwave heating of frozen mashed potato in a domestic oven incorporating electromagnetic frequency spectrum , 2016 .

[36]  Zhenhua Rui,et al.  A quantitative oil and gas reservoir evaluation system for development , 2017 .

[37]  Arash Tahmasebi,et al.  A kinetic study of microwave and fluidized-bed drying of a Chinese lignite , 2014 .

[38]  Jialin Xu,et al.  Experimental investigation on variation of physical properties of coal samples subjected to microwave irradiation , 2017 .

[39]  E. Lester,et al.  Inducing fractures and increasing cleat apertures in a bituminous coal under isotropic stress via application of microwave energy , 2011 .

[40]  Jeyamkondan Subbiah,et al.  A microwave heat transfer model for a rotating multi-component meal in a domestic oven: Development and validation , 2014 .

[41]  R. J. Davison.  Electromagnetic Stimulation of Lloydminster Heavy Oil Reservoirs: Field Test Results , 1995 .

[42]  Chunshan Zheng,et al.  Sensitivity analysis on the microwave heating of coal: A coupled electromagnetic and heat transfer model , 2017 .

[43]  Guozhong Hu,et al.  Adjacent seam pressure-relief gas drainage technique based on ground movement for initial mining phase of longwall face , 2015 .

[44]  E. Lester,et al.  Increased coal grindability as a result of microwave pretreatment at economic energy inputs , 2005 .

[45]  Neil A. Rowson,et al.  Dielectric properties of coal , 2001 .

[46]  R. S. Kasevich,et al.  Pilot Testing of a Radio Frequency Heating System for Enhanced Oil Recovery From Diatomaceous Earth , 1994 .

[47]  Jian-guo Yang,et al.  Effect of microwave pretreatment on oxidized coal flotation , 2013 .

[48]  Gang Chen,et al.  A realistic and integrated model for evaluating oil sands development with Steam Assisted Gravity Drainage technology in Canada , 2018 .

[49]  He Li,et al.  Effect of microwave irradiation on petrophysical characterization of coals , 2016 .