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钾和一氧化碳对松木屑快速热解半焦特性的影响
  • ISSN号:0253-2409
  • 期刊名称:《燃料化学学报》
  • 时间:0
  • 分类:TK6[动力工程及工程热物理—生物能]
  • 作者机构:[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001, [2]中国科学院大学,北京100049
  • 相关基金:国家自然科学基金(21676289);中国科学院国家外国专家局创新团队国际合作伙伴计划和中国科学院青年创新促进会(2014156)资助
中文摘要:

利用固定床反应器、红外光谱仪、吸附仪、X射线衍射仪、电感耦合等离子原子发射光谱仪、偏光显微镜等对比研究了原生生物质(原生物质)及水洗脱钾生物质(脱钾生物质)在N2及富一氧化碳(CO)气氛下所得半焦的产率、官能团及其他物化结构的变化规律。研究表明,与脱钾生物质相比,热解温度低于750℃时,原生物质的半焦产率降低、比表面积增大、芳环结构减少而烷基、脂肪族结构等增加;与N2相比,富CO气氛下所得半焦产率降低、比表面积增大,芳香结构、脂肪族结构、烷基减小。而热解温度高于750℃时,生物质中的钾和热解气氛中的CO均使生物质半焦产率增加、官能团数量和比表面积减少。利用偏光显微镜对生物质半焦表面矿物质的研究表明,热解温度低于750℃时,所得半焦表面矿物组分较少且高度分散;热解温度高于750℃时,所得半焦表面矿物组分较多,分布密集且熔融团聚现象随温度升高而增多。而对于半焦石墨化程度的研究表明,半焦石墨化程度随温度升高而增加,但低热解温度所得半焦的石墨化程度较差。温度高于750℃时,CO气氛使石墨化程度增加,而钾使石墨化程度降低。

英文摘要:

Raw biomass and its de-potassium sample washed by water were pyrolyzed in a fixed bed reactor under pure N2 and CO-rich atmosphere at different temperatures. The obtained biomass chars were characterized by Fourier transform infrared spectroscopy( FT-IR),surface area analyzer,inductively coupled plasma emission spectroscopy and polarizing microscope. The yields of char,functional groups and other physicochemical structure were also studied and their evolution behaviors were examined. The results show that below 750 ℃,the BET surface areas and the amounts of alkyl and aliphatic functional groups in the chars derived from raw biomass are higher than those of de-potassium ones,but the char yields and the amounts of aromatic functional groups in the chars of raw biomass are lower than that of de-potassium samples. As to the effect of CO atmosphere,the yields of char and the amounts of all functional group in the chars derived from CO-rich atmosphere are less than that of N2 atmosphere,But the surface areas is higher than that of N2 atmosphere. Above 750 ℃,both potassium and CO can help to increase the char yields but decrease the amount of functional group and BET surface areas.In addition,the minerals are highly scattered and theirs amount on the surface of chars( raw biomass char,N2atmosphere) is less when the pyrolysis temperature is lower than 750 ℃; while above 750 ℃,those are higher and the clusters of fusion mineral components increases with increasing pyrolysis temperature. As for the graphitization degree of biomass chars,it increases with increasing pyrolysis temperature but poor graphitization was obtained when the pyrolysis temperature is lower than 750 ℃. Moreover,CO can help to increase while K decreases the graphitization degree above 750 ℃.

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期刊信息
  • 《燃料化学学报》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国化学会 中国科学院山西煤炭化学研究所
  • 主编:王建国
  • 地址:太原市桃园南路27号中国科学院山西煤炭化学研究所
  • 邮编:030001
  • 邮箱:rlhx@sxicc.ac.cn
  • 电话:0351-2025214
  • 国际标准刊号:ISSN:0253-2409
  • 国内统一刊号:ISSN:14-1140/TQ
  • 邮发代号:22-50
  • 获奖情况:
  • 获国家优秀期刊三等奖,中科院优秀期刊二等奖,华北优秀期刊奖和山西省一级期刊,《中国学术期刊(光盘版)检索与评价资料规范》优秀奖,2001年获新闻出版总署授予的“中国期刊方阵“双效...,连续十五年获山东省一级期刊
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘(网络版),波兰哥白尼索引,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版),中国北大核心期刊(2000版)
  • 被引量:14785