3-2-1 ガス化温度でのスギおよびブナ木粉熱分解におけるチャーの反応性(3-2 熱分解2,Session 3 バイオマス等,研究発表)

概要

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Primary pyrolysis and secondary reactions behaviors were compared between Japanese cedar wood (a softwood) and Japanese beech wood (a hardwood) under the conditions of oven-dried/ N_2/ 600℃/ 40-600 s by using a closed ampoule reactor. Their demineralized samples were also used. As a result, a major difference was observed for the char gasification reactivities in the secondary reaction stage (120-600 s). Only the yield of beech wood char decreased significantly from 〜20% to 3% in this period and gave CO, CO_2, CH_4 and H_2. Although demineralization substantially reduced the beech wood char reactivity, the beech wood char had still higher reactivity than the cedar wood char. In contrast, thermogravimetric (TG) analysis under N_2 flow gave similar DTG curves for both chars. In co-pyrolysis of the chars (obtained by pyrolysis for 40s) with wood samples, char reactivity difference became observable. This also indicates that such a high gasification reactivity of the beech wood char is related to the pyrolysis environment including water, low molecular weight products etc.
一般社団法人日本エネルギー学会の論文
2009-07-30