THE INFLUENCE OF ALKALI COMPOUNDS ON BIOMASS PYROLYSIS
This paper aims the influence of alkali matters on the pyrolysis property of biomass. Firstly, typical biomass sample - peanut shell, was washed with 5 wt％ acid (H2SO4, HCl) and distilled water, respectively. The concentrations of inorganic compounds in original and washed biomass were characterized with ICP-AES. The pyrolysis characteristics was investigated using thermal balance at heating rate of 10 ℃ min-1 and N2 flow rate of 100ml min-1. It can be observed that the DTG curves of deashed peanut shell obviously were shifted to higher temperature and the char yield increased greatly. Then, K2CO3 and dolomite were added into acid washed and original biomass samples with the concentration of 1 wt％ and 10 wt％. With inorganic addition, the DTG curves of original peanut shell was shifted to low temperature, while that of acid-washed biomass was moved to even higher temperature. In comparison with dolomite, K2CO3 displayed much higher effect on biomass pyrolysis behavior. The kinetic analysis showed that n = 1 as the reaction order is fit for biomass pyrolysis. The activation energy increased greatly with demineralization. It is great for the understanding of the influence of mineral matters on biomass pyrolysis; it is favorable for the development of biomass pyrolysis technology.
pyrolysis alkaline cation demineralization catalyst addition
Xianhua WANG Hanping CHEN Jing WANG Fen XIN Haiping YANG
State Key Lavoratory of Coal Combustion, Huazhong University of Science & Technology, Wuhan 430074, China
国际会议
第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)
武汉
英文
196-201
2007-12-01（万方平台首次上网日期，不代表论文的发表时间）