对麦草碱法制浆黑液固形物(BLS)400～800 ℃热解产物组成特性进行了研究。采用气相色谱(GC)和气相色谱-质谱(GC-MS)对热解气相产物和液相产物组成进行了全面分析; 利用扫描电镜能谱仪(SEM-EDS)对固相产物的表面形貌及元素分布进行了表征。借助热重红外联用技术(TG-FTIR)探讨了热解过程中主要产物的释放规律。结果表明,BLS热解产物中,气相产物主要成分为H2、CO、CO2以及CxHy(CH4、C2H2、C2H4、C2H6)等,液相产物中主要是酚类、酮类、醇类、醚类、酸类、呋喃以及芳香化合物。TG-FTIR结果显示,BLS热解产物释放时间主要集中在1 000～2 000 s(300～600 ℃),此时BLS释放的产物主要为H2O、CO2、CH4、CO,以及烷烃类、芳烃类、酚醇类和酮类化合物。
Abstract
Pyrolysis characteristics of black liquor solid(BLS)was studied on a tubular reactor furnace at 400-800 ℃. The composition of the liquid products and the distribution characteristics of gas products were analyzed by GC-MS and GC. The surface morphology of chars from BLS pyrolysis was characterized by SEM-EDS analysis. The release rule of important volatile matters in BLS pyrolysis process was discussed with the TG-FTIR. The results showed that the main components of the gas products were H2,CO,CO2 and CxHy(CH4,C2H2,C2H4,C2H6), and phenols, ketones, alcohols, acids, furans, and aromatic compounds in liquid products. TG-FTIR results revealed that the release time of BLS pyrolysis products mainly concentrated in 1 000-2 000 s(300-600 ℃), at this time, the released products mainly include H2O, CO2, CH4, CO and alkanes, aromatics, phenols, alcohols and ketone compounds.
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基金
收稿日期:2012-05-14 修回日期:2013-04-02
基金项目:国家自然科学基金项目(21176095,31270635); 国家重点基础研究发展计划(2013CB228101); 国家高技术研究发展计划(2012AA101806)
第一作者:戴涛,硕士生。*通信作者:武书彬,教授。 E-mail: shubinwu@scut.edu.cn。
引文格式:戴涛,武书彬,郭大亮,等. 麦草碱法黑液热解的产物特性及释放规律[J]. 南京林业大学学报:自然科学版,2013,37(4):121-126.
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