Rapid Pyrolysis of Pulverized Biomass at a High Temperature: The Effect of Particle Size on Char Yield, Retentions of Alkali and Alkaline Earth Metallic Species, and Char Particle Shape

被引:19
作者
Shen, Qiqing [1 ,2 ]
Liaw, Sui Boon [1 ,2 ]
Costa, Mario [3 ]
Wu, Hongwei [1 ,2 ]
机构
[1] Curtin Univ, Discipline Chem Engn, Australian Sch Mines, Perth, WA 6845, Australia
[2] Curtin Univ, Minerals Energy & Chem Engn, Perth, WA 6845, Australia
[3] Univ Lisbon, Inst Super Tecn, Mech Engn Dept, IDMEC, P-1049001 Lisbon, Portugal
基金
澳大利亚研究理事会;
关键词
DROP-TUBE FURNACE; WOODY BIOMASS; DEVOLATILIZATION KINETICS; HEATING RATE; BROWN-COAL; COMBUSTION; FLOW; REACTOR; FUELS; DISTRIBUTIONS;
D O I
10.1021/acs.energyfuels.0c00898
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Fast pyrolysis of two biomass materials (mallee wood and pine wood) at 1300 degrees C was conducted in a novel drop tube furnace (DTF) with a double-tube configuration, which enables the direct determination of char yields. Three particle sizes (90-106, 150-250, and 250-355 mu m) were considered for investigating the effect of particle size on char yield, retention of alkali and alkaline earth metallic (AAEM) species, and shape of derived char particles from pyrolysis at such a high temperature. The experimental results show that the char yield increases with the biomass particle size and that the use of the ash tracer method with total ash, Mg, and Ca as a tracer can substantially overestimate the char yield by as high as 4.0% (absolute error) at actual char yields of mere similar to 1.0-3.4%. Additionally, a decrease in particle size significantly enhances the release of AAEM species during biomass pyrolysis. Such observations can at least be attributed to the considerably higher heating rate experienced by small particles during rapid pyrolysis, which is estimated to be 5.4 times of that experienced by large particles. For mallee wood, rapid pyrolysis of small biomass particles (90-106 mu m) forms nearly spherical char particles, while that of large biomass particles (250-355 mu m) tends to retain their elongated shape. This is due to extensive melting of small particles during rapid pyrolysis at 1300 degrees C, while large biomass particles only experience partial melting. For pine wood, particle size has no obvious effect on particle shape of pine chars that are mainly cenospheres with smooth surfaces, demonstrating severe melting of the cell structure.
引用
收藏
页码:7140 / 7148
页数:9
相关论文
共 63 条
  • [1] Evaluation of structural features of chars from pyrolysis of biomass of different particle sizes
    Asadullah, Mohammad
    Zhang, Shu
    Li, Chun-Zhu
    [J]. FUEL PROCESSING TECHNOLOGY, 2010, 91 (08) : 877 - 881
  • [2] Importance of Biomass Particle Size in Structural Evolution and Reactivity of Char in Steam Gasification
    Asadullah, Mohammad
    Zhang, Shu
    Min, Zhenhua
    Yimsiri, Piyachat
    Li, Chun-Zhu
    [J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2009, 48 (22) : 9858 - 9863
  • [3] Size and structural characterization of lignin-cellulosic fuels after the rapid devolatilization
    Biagini, E.
    Narducci, P.
    Tognotti, L.
    [J]. FUEL, 2008, 87 (02) : 177 - 186
  • [4] Biagini E., 2003, CHARACTERISATION BIO
  • [5] FAST PYROLYSIS OF SAWDUST IN AN ENTRAINED FLOW REACTOR
    BITOWFT, B
    ANDERSSON, LA
    BJERLE, I
    [J]. FUEL, 1989, 68 (05) : 561 - 566
  • [6] Comparison of Primary Volatiles from Coal and Biomass Pyrolysis in N2 and CO2
    Cerciello, Francesca
    Senneca, Osvalda
    Russo, Carmela
    Apicella, Barbara
    [J]. ENERGY & FUELS, 2019, 33 (12) : 12822 - 12829
  • [7] THERMAL-CONDUCTIVITY OF ARGON IN TEMPERATURE-RANGE 350 TO 2500 K
    CHEN, SHP
    SAXENA, SC
    [J]. MOLECULAR PHYSICS, 1975, 29 (02) : 455 - 466
  • [8] Effect of water vapour on particulate matter emission during oxyfuel combustion of char and in situ volatiles generated from rapid pyrolysis of chromated-copper-arsenate-treated wood
    Chen, Xujun
    Liaw, Sui Boon
    Wu, Hongwei
    [J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2019, 37 (04) : 4319 - 4327
  • [9] Suspension combustion of wood: Influence of pyrolysis conditions on char yield, morphology, and reactivity
    Dall'Ora, Michelangelo
    Jensen, Peter Arendt
    Jensen, Anker Degn
    [J]. ENERGY & FUELS, 2008, 22 (05) : 2955 - 2962
  • [10] Characterization of Size-Segregated Soot from Pine Wood Pyrolysis in a Drop Tube Furnace at 1300 °C
    Deng, Changya
    Liaw, Sui Boon
    Wu, Hongwei
    [J]. ENERGY & FUELS, 2019, 33 (03) : 2293 - 2300