碱金属离子对生物质的催化热解及气化实验研究

EXPERIMENT STUDY OF ALKALI METAL IONS ON BIOMASS CATALYTIC PYROLYSIS AND GASIFICATION

以传统生物质(稻壳)与潜在生物质(毛竹)为实验原料,通过热重法对生物质热解特性进行研究,利用单元体气化炉研究催化剂对生物质气化特性的影响。结果显示:脱灰除去矿物质后,热解曲线向高温区移动,反应活性降低;加入碱金属离子后,半焦产率提高,热解向低温区移动,反应活性增强。加入碱金属离子后,气化合成气中Cx Hy浓度大幅增大,并随催化剂含量的增大而增大。气化过程中,CO浓度曲线出现两个明显峰区,加入催化剂使前峰区面积显著增大、前移。在催化剂作用下,毛竹、稻壳的热解、气化特性明显改善。

In this paper, traditional biomass （rice husk） and potential biomass （Phyllostachys pubescens ） as experimental material. The properties of biomass catalytic pyrolysis were investigated using thermogravimetric method, and the properties of biomass catalytic gasification was researched by the unit gasifier. After removal of the mineral ash, the curve to move high temperature pyrolysis zone, the reaction activity decrease; the alkali metal ions to improve the yield of char, pyrolysis shifts to lower temperature, the reaction activity increases. After addition of the alkali metal ions, the concentration of the gasification syngas CxHy significantly increased, and increased as the content of the catalyst, CxHy concentrations rise. In gasification process, CO concentration curve appears two distinct peak zones. After addition of the alkali metal ions, the first peak zone appears a significant increase and move forward. In the catalyst, the pyrolysis and gasification properties of Phyllostachys pubescens, rice husk was significantly improved.