Preparation and properties of biomass char for ironmaking
Preparation and properties of biomass char for ironmaking
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发表时间：
2012
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通讯作者：
Yang Tian-jun
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作者：
Yang Tian-jun
生物质生物质在400、500、600和700℃两种不同的加热方式下炭化30、60和90min，生成生物质焦。利用扫描电子显微镜和热重分析对生物质焦的组成、微观结构和燃烧性能进行了研究。研究了制备条件对生物质焦产量和与二氧化碳反应活性的影响。结果表明，生物质焦具有典型的管状或片状结构，与煤不同。生物质焦中N、S、灰分和碱金属的含量较低，但燃烧性能优于煤样。生物质焦的最佳制备条件为生物质生物质在500℃恒温加热30min。
Raw biomass was carbonized by two different heating patterns to produce biomass char at 400,500,600 and 700 ℃ for 30,60 and 90 min.The composition,microstructure,and combustibility of the derived biomass char were investigated by scanning electron microscopy(SEM) and thermogravimetric analysis(TG-DTG).The effects of preparing conditions on the biomass char's yield and reactivity for reacting with CO2 were studied.It is shown that the biomass char has typical duct structure or sheet structure,which is different from coal.The contents of N,S,ash and alkali metals in the biomass char are much lower,but its combustibility is better than coal samples,suitable for using as a reducing agent and a heating agent in ironmaking to partially replace coal and coke.The optimum preparing condition of biomass char for ironmaking is to carbonize raw biomass by a constant temperature heating pattern at 500 ℃ for 30 min.