Real-Time and Post-reaction Microscopic Structural Analysis of Biomass Undergoing Pyrolysis

被引：79

作者：

Haas, Thomas J. ^{[1
]}

Nimlos, Mark R. ^{[2
]}

Donohoe, Bryon S. ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Chem & Biosci Ctr, Golden, CO 80401 USA

[2] Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA

来源：

ENERGY & FUELS | 2009年 / 23卷 / 07期

关键词：

STEAM GASIFICATION; PARTICLE-SIZE; FLUIDIZED-BED; CHARS; KINETICS; DEVOLATILIZATION; RESIDUES; CHARCOAL; LIGNIN;

D O I：

10.1021/ef900201b

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：

The structural complexity of unprocessed plant tissues used for thermochemical conversion of biomass to fuels and energy impedes heat and mass transfer and may increase the occurrence of tar-forming secondary chemical reactions. At industrial scales, gas and liquid products trapped within large biomass particles may reduce net fuel yields and increase tars, impacting industrial operations and increasing overall costs. Real-time microscopic analysis of poplar (Populus sp.) wood samples undergoing anoxic, pyrolytic heat treatment has revealed a pattern of tissue and macropore expansion and collapse. Post-reaction Structural analyses of biomass char (biochar) by light and transmission electron microscopy have provided direct structural evidence of pyrolysis product mass-transfer issues, including trapped pyrolysis products and cell wall compression, and have demonstrated the impact of heat-transfer problems on biomass particles. Finally, microscopic imaging has revealed that pyrolyzed/gasified biochars recovered from a fluidized bed reactor retain a similar pre-reaction basic plant tissue structure as the samples used in this study, suggesting that the phenomena observed here are representative of those that occur in larger scale reactors.

引用

页码：3810 / 3817

页数：8

共 27 条

[1]

ABAZAJIAN AN, 2005, Patent No. 6939999

[2]

Abbott, 2006, Patent No. [US 7,087,652 B2, 7087652]

[3] INFLUENCE OF PHYSICAL AND CHEMICAL-PARAMETERS ON WOOD PYROLYSIS [J].

BEAUMONT, O ;

SCHWOB, Y .

INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1984, 23 (04) :637-641

[4] Size and structural characterization of lignin-cellulosic fuels after the rapid devolatilization [J].

Biagini, E. ;

Narducci, P. ;

Tognotti, L. .

FUEL, 2008, 87 (02) :177-186

[5] Devolatilization and combustion kinetics of Quercus cerris bark [J].

Branca, Carmen ;

Iannace, Antonella ;

Di Blasi, Colomba .

ENERGY & FUELS, 2007, 21 (02) :1078-1084

[6] An overview of fast pyrolysis of biomass [J].

Bridgwater, AV ;

Meier, D ;

Radlein, D .

ORGANIC GEOCHEMISTRY, 1999, 30 (12) :1479-1493

[7]

Cagnon Benoit, 2009, Bioresour Technol, V100, P292, DOI 10.1016/j.biortech.2008.06.009

[8]

CARPENTER DL, ENERGY FUELS UNPUB

[9] Influence of pyrolysis conditions on the structure and gasification reactivity of biomass chars [J].

Cetin, E ;

Moghtaderi, B ;

Gupta, R ;

Wall, TF .

FUEL, 2004, 83 (16) :2139-2150

[10]

Della Rocca PA, 1999, BIOMASS BIOENERG, V16, P79, DOI 10.1016/S0961-9534(98)00067-1

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