Devolatilization and Attrition Behavior of Fuel Pellets during Fluidized-Bed Gasification

被引：26

作者：

Ammendola, Paola ^{[1
]}

Chirone, Riccardo ^{[1
]}

Miccio, Francesco ^{[1
]}

Ruoppolo, Giovanna ^{[1
]}

Scala, Fabrizio ^{[1
]}

机构：

[1] CNR, Ist Ric Combust, I-80125 Naples, Italy

来源：

ENERGY & FUELS | 2011年 / 25卷 / 03期

关键词：

COMBUSTION; BIOMASS; PARTICLES;

D O I：

10.1021/ef101614j

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：

080707 [能源环境工程]; 082001 [油气井工程];

摘要：

Devolatilization, fragmentation, and attrition phenomena occurring to fuel pellets during fluidized-bed gasification have been studied. Three pelletized fuels, one based on wood and the the other two based on a mixture of wood and coal, were characterized in a lab-scale fluidized-bed reactor under gasification, inert, and combustion Conditions, for comparison. Similar and relatively long devolatilization times were observed for the three types of pellets. Pellet breakage by primary fragmentation upon devolatilization appeared to be rather limited for all fuels, indicating that fuel pelletization gives sufficient Mechanical strength to the particles. On the contrary, secondary fragmentation and attrition by abrasion of char particles during gasification were extensive, suggesting a gasification-assisted attrition enhancement effect. This mechanism,: associated with the low reactivity of the generated fines, made the loss of carbon by fine elutriation during char gasification much more significant than that found under combustion conditions. Larger carbon losses were associated with fuel pellets with a lower reactivity.

引用

页码：1260 / 1266

页数：7

共 15 条

[1]

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