摘要
以椰壳为代表原料进行热解研究 ,用热重分析法分析了椰壳热分解的机理。与一般木质原料一样 ,椰壳也是由半纤维素、纤维素和木质素构成 ,椰壳中的半纤维素的分解温度在 2 0 0～ 2 6 0℃ ,纤维素的分解温度在 2 6 0～ 2 95℃ ,木质素的分解温度在 2 95～ 32 0℃。本研究还探讨了椰壳炭的孔结构参数 ,炭化温度 4 2 5～ 72 0℃ ,其微孔容积为 0 .12 4～ 0 .2 2 2mL / g ,并用扫描电子显微镜观察了椰壳炭的表面形貌 ,椰壳在热分解时 ,细胞壁分解形成了微米级的大孔 ,并保留了椰壳的纤维状结构。采用离子发射光谱 ,分析了椰壳炭的微量元素组成 ,主要有铝、钡、铁、镁、钙。
Pyrolysis of coconut shell was carried out in this study.Mechanism of coconut shell pyrolysis was studied (using) thermogravimetric analysis method.Similar to common wooden materials,coconut shell is also composed of semi-cellulose,cellulose and lignin.In coconut shell,semi-cellulose decomposes at 200-260 ℃,cellulose at 260-295 ℃ and lignin at 295-320 ℃.The pore structure parameters of coconut shell activated carbon are studied.At carbonizing temperature between 425 ℃ and 720 ℃,the micropore volume is between 0.124-0.222 mL/g.Surface of the (activated) carbon is also observed by scanning electron microscopy(SEM).During thermogravimetric analysis,the cell wall of coconut shell disassembles to form macropore at μm level while its cellulose structure was retained.The main trace (elements) in coconut shell carbon,such as Al,Ba,Fe,Mg,Ca,Si were measured by ICP.
出处
《林产化学与工业》
EI
CAS
CSCD
2004年第3期61-64,共4页
Chemistry and Industry of Forest Products
基金
中国林业科学研究院科学技术发展基金资助项目 (无编号 )
关键词
椰壳
热解
活性炭
coconut shell
pyrolysis
activated carbon
