基于不同组分的海藻热分解机理研究  

RESEARCH OF PYROLYSIS MECHANISM FOR SEAWEED WITH DIFFERENT COMPONENTS

作　　者：王爽[1] 胡亚敏[1] 王谦[1] 曹斌[1] 徐姗楠[2] 吉恒松[1] 

机构地区：[1]江苏大学能源与动力工程学院,镇江212013 [2]中国水产科学研究院南海水产研究所,农业部南海渔业资源开发利用重点实验室,广州510300

出　　处：《太阳能学报》2017年第12期3461-3468,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51676091;51306078);江苏大学“青年骨干教师培养工程”青年学术带头人培育人选资助;国家科技支撑计划(2015BAD21B06)

摘　　要：为了深入探究海藻生物质的热解机理,采用表征分析和热重-质谱分析展开对海藻中多糖、蛋白质、灰分这3种主要组分参与热解规律的研究。结果表明:多糖和蛋白质的热失重范围分别为175~310℃和300~350℃;而灰分使海藻热解过程中最大热失重速率增大,且脱灰使失重峰对应的温度区间向低温段偏移。海藻热解过程中主要气体的释放规律为:由于多糖、蛋白质和灰分在参与热解过程中均产生CO_2,其释放规律曲线与热失重曲线相对应。而SO_2气体的释放主要来自于多糖中硫酸基的热解。由于多糖及脱灰后海藻不含或含有少量蛋白质,所以热解过程中无NO_2释放。In order to further explore the pyrolysis mechanism of seaweed biomass, the characterization analysis and thermogravimetric-mass spectrometry analysis were used to research the pyrolysis rule of the three main components, polysaccharide, protein and ash content in seaweed. The results show that the decomposition of polysaccharide and protein occurred in the temperature range from 175 ℃ to 310 ℃ and from 300 ℃ to 350 ℃, respectively. The ash composition plays certain role in the pyrolysis process, which makes the maximum weight loss rate increase and the temperature range corresponding to weightlessness peak shift to the low temperature section. It is found that CO2 is released in the whole pyrolysis process, because protein, polysaccharide and ash composition all produced carbon dioxide, and the release curve is conformed to the DTG curve. SO2 gas release attributed to the pyrolysis of sulfuric acid base of polysaccharide. NO2 cannot be detected in pyrolysis process because there isn＇ t protein for polysaccharide or deashing seaweed.

关 键 词：海藻生物质 热解 蛋白质 水溶性多糖 灰分 

分 类 号：TK6[动力工程及工程热物理—生物能]