Kinetic and heat transfer control in the slow and flash pyrolysis of solids

被引:188
作者
DiBlasi, C
机构
[1] Dipartimento di Ingegneria Chimica, Univ. Studi di Napoli Federico II, 80125 Napoli, Piazzale V. Tecchio
关键词
D O I
10.1021/ie950243d
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The coupled effects of particle size and external heating conditions (reactor heating rate and final temperature) on cellulose pyrolysis are investigated by means of a computer model accounting for all main transport phenomena, variable thermophysical properties and primary, and secondary reaction processes. The dynamics of particle conversion are predicted, and final product distributions are favorably compared with experimental measurements. A map is constructed, in terms of particle size as a function of the reactor temperature, to identify the transition from a kinetically controlled conversion to a heat transfer controlled conversion (thermally thin and thermally thick regimes) and from nash to slow-conventional pyrolysis. Conditions for maximizing oil, gas, or char yields are also discussed.
引用
收藏
页码:37 / 46
页数:10
相关论文
共 31 条
[1]  
[Anonymous], 16 S INT COMB COMB I
[2]  
Antal M.J., 1985, Advances in Solar Energy, V2, P175, DOI [10.1007/978-1-4613-9951-3_4, DOI 10.1007/978-1-4613-9951-3_4]
[3]   REVIEW OF METHODS FOR IMPROVING THE YIELD OF CHARCOAL FROM BIOMASS [J].
ANTAL, MJ ;
MOK, WSL ;
VARHEGYI, G ;
SZEKELY, T .
ENERGY & FUELS, 1990, 4 (03) :221-225
[4]   CELLULOSE PYROLYSIS KINETICS - THE CURRENT STATE KNOWLEDGE [J].
ANTAL, MJ ;
VARHEGYI, G .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1995, 34 (03) :703-717
[5]  
Antal MJ, 1982, ADV SOLAR ENERGY, VI, P61
[6]   PYROLYSIS OF LARGE WOOD SAMPLES [J].
BELLEVILLE, P ;
CAPART, R ;
GELUS, M .
APPLIED ENERGY, 1984, 16 (03) :223-237
[7]   TEMPERATURE PROFILES AND WEIGHT-LOSS IN THE THERMAL-DECOMPOSITION OF LARGE SPHERICAL WOOD PARTICLES [J].
BILBAO, R ;
MILLERA, A ;
MURILLO, MB .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1993, 32 (09) :1811-1817
[8]   PRODUCT YIELDS AND KINETICS FROM THE VAPOR-PHASE CRACKING OF WOOD PYROLYSIS TARS [J].
BOROSON, ML ;
HOWARD, JB ;
LONGWELL, JP ;
PETERS, WA .
AICHE JOURNAL, 1989, 35 (01) :120-128
[9]   KINETIC-MODEL FOR PYROLYSIS OF CELLULOSE [J].
BRADBURY, AGW ;
SAKAI, Y ;
SHAFIZADEH, F .
JOURNAL OF APPLIED POLYMER SCIENCE, 1979, 23 (11) :3271-3280
[10]  
BRIDGWATER AV, 1993, ETSU BT100207 REP