论文部分内容阅读
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CO2,其释放规律曲线与热失重曲线相对应.而SO2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NO2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 CO 2 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.