Experimental studies on two dimensional particle swarm gasification of different coal chars and petroleum coke at high temperature

Abstract In this study, the effects of particle concentration on particle temperature and gasifying agent concentration was analyzed based on the gasification experiments. The gasification processes of different coal chars and petcoke were divided into fast reaction process (gasification of lignite and bituminous char) and slow reaction process (gasification of anthracite char and petcoke). The reactivity index of fast reactions was extremely higher than that of slow reactions. The reaction rate of sparse particle swarms also differed from that of dense particle swarms for the same sample. For fast reactions, the effects of particle concentration on gasification reactivity was limited. It was illustrated that the evident increase of particle temperature and the decrease of gasifying agent played a contrary effect on reactivity for fast-reaction samples. Nevertheless, the slight decrease of particle temperature and evident decrease of gasifying agent concentration led to the decrease of reaction rate with particle concentration for slow-reaction samples.

[1]  C. M. van der Meijden,et al.  Conversion of high-ash coal under steam and CO2 gasification conditions , 2016 .

[2]  Zhiping Zhu,et al.  Effect of temperature on gasification performance and sodium transformation of Zhundong coal , 2017 .

[3]  N. Mahinpey,et al.  Kinetic study of coal steam and CO2 gasification: A new method to reduce interparticle diffusion , 2015 .

[4]  J. Giddings,et al.  NEW METHOD FOR PREDICTION OF BINARY GAS-PHASE DIFFUSION COEFFICIENTS , 1966 .

[5]  Xinyan Huang,et al.  Experimental study on the diffusion–kinetics interaction in heterogeneous reaction of coal , 2017, Journal of Thermal Analysis and Calorimetry.

[6]  H. Spliethoff,et al.  Gasification kinetics of a bituminous coal at elevated pressures: Entrained flow experiments and numerical simulations , 2017 .

[7]  Christopher Higman,et al.  Advances in coal gasification, hydrogenation, and gas treating for the production of chemicals and fuels. , 2014, Chemical reviews.

[8]  Hiromi Yamashita,et al.  Combustion and CO2 gasification of coals in a wide temperature range , 1993 .

[9]  Massoud Massoudi Farid,et al.  The effect of CO on coal–biomass co-gasification with CO2 , 2017 .

[10]  A. Jess,et al.  Influence of mass transfer on thermogravimetric analysis of combustion and gasification reactivity of coke , 2010 .

[11]  A. Gómez-Barea,et al.  Reaction-diffusion model of TGA gasification experiments for estimating diffusional effects , 2005 .

[12]  Zhenghua Dai,et al.  Study on CO2 gasification reactivity and physical characteristics of biomass, petroleum coke and coal chars. , 2014, Bioresource technology.

[13]  M. Liu,et al.  Morphological Evolution of a Single Char Particle with a Low Ash Fusion Temperature during the Whole Gasification Process , 2018 .

[14]  S. Bhattacharya,et al.  High‐temperature pyrolysis and CO2 gasification of Victorian brown coal and Rhenish lignite in an entrained flow reactor , 2016 .

[15]  P. Ollero,et al.  Diffusional effects in TGA gasification experiments for kinetic determination , 2002 .

[16]  M. Liu,et al.  Experimental studies on CO2 gasification of petcoke particle swarm at high temperatures , 2018, AIChE Journal.

[17]  D. G. Roberts,et al.  Char Gasification with O2, CO2, and H2O: Effects of Pressure on Intrinsic Reaction Kinetics , 2000 .

[18]  Hai‐feng Liu,et al.  Modeling study for the effect of particle size on char gasification with CO2 , 2017 .

[19]  Ren Liwei,et al.  Co-gasification reactivity of petcoke and coal at high temperature , 2017 .

[20]  F. Gao,et al.  Laboratory Study on Gasification Reactivity of Coals and Petcokes in CO2/Steam at High Temperatures , 2013 .

[21]  M. V. Gil,et al.  Biomass devolatilization at high temperature under N2 and CO2: char morphology and reactivity. , 2015 .

[22]  Chung-Hwan Jeon,et al.  Kinetics of coal char gasification with CO2: Impact of internal/external diffusion at high temperature and elevated pressure , 2014 .

[23]  D. G. Roberts,et al.  Kinetics of Char Gasification with CO2 under Regime II Conditions: Effects of Temperature, Reactant, and Total Pressure , 2010 .

[24]  M. H. Chakrabarti,et al.  The effect of temperature on various parameters in coal, biomass and CO-gasification: A review , 2012 .

[25]  M. Ściążko,et al.  Experimental study on kinetics of coal char–CO2 reaction by means of pressurized thermogravimetric analysis , 2017, Journal of Thermal Analysis and Calorimetry.

[26]  Hai‐feng Liu,et al.  In situ experimental study on the combustion characteristics of captured chars on the molten slag surface , 2016 .

[27]  A. Hoadley,et al.  Characteristics of high temperature C-CO2 gasification reactivity of Victorian brown coal char and its blends with high ash fusion temperature bituminous coal , 2017 .

[28]  D. G. Roberts,et al.  Gasification behaviour of Australian coals at high temperature and pressure , 2006 .

[29]  A. Ünlü,et al.  Pilot scale entrained flow gasification of Turkish lignites , 2017 .

[30]  T. Kojima,et al.  Mineral reaction and morphology change during gasification of coal in CO2 at elevated temperatures , 2003 .

[31]  Qinghua Wang,et al.  A general relationship between the kinetic parameters for the gasification of coal chars with CO2 and coal type , 2001 .

[32]  S. Voglsam,et al.  Mass transfer limitation in thermogravimetry of biomass gasification , 2012, Journal of Thermal Analysis and Calorimetry.

[33]  Hai‐feng Liu,et al.  Pilot-scale comparison investigation of different entrained-flow gasification technologies and prediction on industrial-scale gasification performance , 2014 .

[34]  Yang Wang,et al.  An experimental investigation into the gasification reactivity of chars prepared at high temperatures , 2008 .

[35]  S. Bhattacharya,et al.  Kinetics of CO2 and steam gasification of Victorian brown coal chars , 2016 .

[36]  Hai‐feng Liu,et al.  In-situ experimental study of CO2 gasification of char particles on molten slag surface , 2015 .

[37]  S. Schulze,et al.  Heat and mass transfer within thermogravimetric analyser: From simulation to improved estimation of kinetic data for char gasification , 2017 .