温度对铬革屑热解产物及特性的影响

在热解终温为350～750℃的条件下，对铬革屑的热解产物及其特性进行研究，为其热解资源化利用提供实验支持。结果表明，550℃条件下热解液体产率最高，为46.82%。750℃条件下热解气体产率上升显著，热解气热值随温度的升高而上升。热解液体产物主要为含N类及N/O类物质。随热解温度的升高，液体产物含氧量明显降低。固体产物有机官能团迅速减少，C含量上升，同时六价铬含量迅速下降，绝大部分铬富集于热解焦。

Effects of temperature on pyrolysis products and characteristics of chrome shavings

To provide experimental supports for resource utilization of chrome shavings, a small-scale external heated fixed bed pyrolyer was used to study the effects of temperature on its pyrolysis products and characteristics. The temperature range of experiment was 350℃ to 750℃. The results showed that the maximum liquid yield was 46.82% at 550℃. With rising temperature until to 750℃, gas yield increased significantly, and its calorific became also higher. The main ingredients in liquid product were N-and N/O-containing compounds. The oxygen content in liquid products decreased obviously with temperature increasing, and that of hexavalent chromium did rapidly and the most stayed in pyrolysis char. Organic functional groups in solid products decreased dramatically when the temperature getting higher, while carbon content increased.