改性花生壳基黏结剂性状试验研究
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摘要
分别用质量分数为1.5%、2.0%、2.5%NaOH改性处理花生壳制备黏结剂,并与粉煤干法冷压成型制备型煤。借助SEM与BET技术手段对改性花生壳结构性状进行表征,研究了Na OH质量分数对花生壳性状改性差异及黏合粉煤的潜质。结果表明,改性后花生壳结构蓬松,纤维素暴露,孔隙与比表面积增加,活性位点增多,以2%NaOH改性花生壳性能最佳,SEM照片中表面光滑、粗细均匀的棒状纤维素完全暴露而不被破坏,且最大限度将半纤维素与木质素溶出,比表面积较大为0.45 m2/g,孔隙较多,氮吸附法测得以中孔为主(约30 nm)。2%NaOH改性花生壳基型煤强度最大,抗压强度为3 238.45 N,跌落强度为77.78%。
Peanut shell was modified with 1.5%, 2.0% and 2.5% NaOH to prepare binder, and briquette was prepared by dry cold pressing with pulverized coal. The properties of modified peanut shell were characterized by SEM and BET. The effects of NaOH concentration on the improvement of peanut shell properties and the potential of bonded pulverized coal were studied. The results showed that structure of modified peanut shell was loose, cellulose was exposed, pore and specific surface area were increased, and active sites were increased. 2% NaOH modified peanut shell had the best performance. The cellulose with smooth surface and uniform thickness was exposed completely without being destroyed in SEM photographs.The hemicellulose and lignin were dissolved to the maximum extent. The specific surface area was 0.45 m2/g, and the pore was more with mesoporous(about 30 nm). 2% NaOH modified peanut shell-based briquette has the highest strength, the compressive strength is 3 238.45 N, and the drop strength is 77.78%.
Peanut shell was modified with 1.5%, 2.0% and 2.5% NaOH to prepare binder, and briquette was prepared by dry cold pressing with pulverized coal. The properties of modified peanut shell were characterized by SEM and BET. The effects of NaOH concentration on the improvement of peanut shell properties and the potential of bonded pulverized coal were studied. The results showed that structure of modified peanut shell was loose, cellulose was exposed, pore and specific surface area were increased, and active sites were increased. 2% NaOH modified peanut shell had the best performance. The cellulose with smooth surface and uniform thickness was exposed completely without being destroyed in SEM photographs.The hemicellulose and lignin were dissolved to the maximum extent. The specific surface area was 0.45 m2/g, and the pore was more with mesoporous(about 30 nm). 2% NaOH modified peanut shell-based briquette has the highest strength, the compressive strength is 3 238.45 N, and the drop strength is 77.78%.
引文
[1]岳青.花生壳综合利用研究进展[J].粮油食品科技,2013,21(5):40-42.
[2]崔泽苹,李志合,李宁,等.水洗预处理对花生壳热解特性及产物的影响[J].可再生能源,2018,36(10):1431-1436.
[3] WALL J D. Bioenergy[M]. Washington DC:ASM Press, 2008:179-191.
[4]陈娟,刘皓,张智芳,等.神木低变质粉煤加入量对型煤型焦性能的影响[J].当代化工,2018,47(1):13-16.
[5]李珊珊.低阶粉煤热解工艺技术的选择[J].山东化工,2018,47(3):75-77.
[6]张秦龙,杨佳.发展中的榆林市兰炭产业[J].产业与科技论坛,2013,12(8):61-62.
[7]付仲毅,于晓娜,张晓帆,等.不同温度花生壳生物炭孔隙特征及其差异[J].土壤通报,2018,49(3):575-581.
[8]刘辉,吴少华,孙锐,等.快速热解褐煤焦的比表面积及孔隙结构[J].中国电机工程学报,2005,25(12):86-90.
[9]何艳峰,李秀金,方文杰,等.氢氧化钠固态预处理对稻草中木素结构特性的影响[J].环境科学学报,2008,28(3):534-539.
[10]欧阳嘉,李鑫,董郑伟,等.碱法—酶法处理玉米秸秆的制糖工艺研究[J].南京林业大学学报(自然科学版),2010,34(3):1-5.
[11]康佳丽,李秀金,朱保宁,等. NaOH固态化学预处理对麦秸沼气发酵效率的影响研究[J].农业环境科学学报,2007,26(5):1973-1976.
[12]刘佳.生物质复合型煤黏结剂的制备与应用研究[D].兰州:兰州大学,2015.
[13]陈娟,刘皓,李健,等.低变质粉煤的玉米秸秆型煤黏结剂的研究[J].中国煤炭,2017,43(4):105-108.
[2]崔泽苹,李志合,李宁,等.水洗预处理对花生壳热解特性及产物的影响[J].可再生能源,2018,36(10):1431-1436.
[3] WALL J D. Bioenergy[M]. Washington DC:ASM Press, 2008:179-191.
[4]陈娟,刘皓,张智芳,等.神木低变质粉煤加入量对型煤型焦性能的影响[J].当代化工,2018,47(1):13-16.
[5]李珊珊.低阶粉煤热解工艺技术的选择[J].山东化工,2018,47(3):75-77.
[6]张秦龙,杨佳.发展中的榆林市兰炭产业[J].产业与科技论坛,2013,12(8):61-62.
[7]付仲毅,于晓娜,张晓帆,等.不同温度花生壳生物炭孔隙特征及其差异[J].土壤通报,2018,49(3):575-581.
[8]刘辉,吴少华,孙锐,等.快速热解褐煤焦的比表面积及孔隙结构[J].中国电机工程学报,2005,25(12):86-90.
[9]何艳峰,李秀金,方文杰,等.氢氧化钠固态预处理对稻草中木素结构特性的影响[J].环境科学学报,2008,28(3):534-539.
[10]欧阳嘉,李鑫,董郑伟,等.碱法—酶法处理玉米秸秆的制糖工艺研究[J].南京林业大学学报(自然科学版),2010,34(3):1-5.
[11]康佳丽,李秀金,朱保宁,等. NaOH固态化学预处理对麦秸沼气发酵效率的影响研究[J].农业环境科学学报,2007,26(5):1973-1976.
[12]刘佳.生物质复合型煤黏结剂的制备与应用研究[D].兰州:兰州大学,2015.
[13]陈娟,刘皓,李健,等.低变质粉煤的玉米秸秆型煤黏结剂的研究[J].中国煤炭,2017,43(4):105-108.