Co-firing combustion characteristics of different ages of Bambusa balcooa relative to a high ash coal

RENEWABLE ENERGY

卷:105

Article

Makwarela, M. O.^1,2,3  Bada, S. O.^1,2,3  Falcon, R. M. S.¹ 

[1] Univ Witwatersrand, Fac Engn & Built Environm, Sch Chem & Met Engn, P Bag X3, ZA-2050 Johannesburg, South Africa

[2] MINTEK, Dept Mineral Proc, ZA-2125 Johannesburg, South Africa

[3] MINTEK, Phyromet Div, ZA-2125 Johannesburg, South Africa

关键词: Bamboo;    Carbonization;    Combustion;    Torrefaction;    Reactivity;   

DOI  :  10.1016/j.renene.2016.12.059

来源: Elsevier

【 摘 要 】

Bambusa balcooa samples of 1, 3 and 4 years old were subjected to torrefaction at 250 degrees C and 280 degrees C, and low temperature carbonization at 350 degrees C and 400 degrees C to establish their combustion, co-combustion and physicochemical properties. The combustibility of these raw and thermally treated bamboo materials was studied using thermogravimetric analysis (TGA). The nitrogen content of the raw bamboo samples decreased with the plant's age and there was no correlation between the volatile matter content of the bamboo and the age of the samples. The calorific values (CV) for the raw bamboo samples ranging from 17 MJ/kg to 18 MJ/kg, while the torrefied and carbonized samples exhibited CVs ranging from 25 MJ/kg to 28 MJ/kg and 28 MJ/kg to 30 MJ/kg, respectively. The torrefied 4 year old sample has the highest mass and energy yield, whereas the carbonized 3 year old had the highest values. Both the raw and thermally treated bamboo had higher reactivities and lower ignition temperatures than the coal. The carbonized 4 year old bamboo is found to be more compatible to coal in terms of its combustion characteristic. Therefore, it's likely to be the preferred alternative source of fuel for co-firing with coal. (C) 2016 Elsevier Ltd. All rights reserved.

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