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低温催化气化工艺可以将禽畜粪便等低品质生物质废物快速地转化为氢或合成气等洁净能源,避免了这些废物的大量积聚对环境造成的危害。使用X射线衍射仪(X-ray diffractometer,XRD)、热重分析(thermogravimetric analyzer,TGA)等分析测试仪器考察禽畜粪便中矿物质组分对其热解半焦特性及其氧化行为的影响。结果表明:选用的禽畜粪便样品中的矿物质组分钙系物质含量较高,特别是鸡粪中含有大量的CaCO3;浓度为5mol/L的HCl及3%HF酸洗处理能够将禽畜粪便中几乎所有的矿物质组分脱除;猪粪半焦氧化行为比较简单,由于CaO的固碳效应,鸡粪半焦的氧化过程较复杂;脱矿物质后禽畜粪便的半焦氧化反应活性明显下降,表明禽畜粪便半焦中的矿物质组分对其氧化过程的催化作用十分显著。
The low-temperature catalytic gasification process can quickly convert low-quality biomass waste such as livestock manure into clean energy such as hydrogen or syngas, and avoid the environmental damage caused by the large accumulation of these wastes. X-ray diffractometer (XRD), thermogravimetric analyzer (TGA) and other analytical instruments were used to investigate the effects of mineral components in livestock excrements on their pyrolysis char characteristics and their oxidation behavior. The results showed that the mineral components of the selected livestock manure samples had high calcium content, especially the chicken manure contained a large amount of CaCO3. The concentration of 5 mol / L HCl and 3% Almost all the mineral components in the excrement were removed. The oxidation behavior of semi-coke in chicken manure was more complicated due to the carbon fixation effect of CaO. The semi-coke oxidation of livestock manure after demineralization Activity significantly decreased, indicating that livestock semi-coke minerals in the catalytic role of its oxidation process is very significant.