Study on the pyrolysis products of tobacco stalk and its influencing factors.

The effects of temperature and time on the characteristic of pyrolysis products from tobacco stalk,and the characteristics(proximate analysis and heating values) of its products after pyrolysis under different experimental conditions were studied.The pyrolysis time was controlled in 30 min and 60 min with the same temperature from 300 ℃ to 600 ℃.The results showed that higher temperature increased the fixed carbon(FC) content and heating values at first,and get a maximum after 550 ℃.The highest heating value was 28.04 MJ/kg in the test run within 30 min pyrolysis time,and decrease to 27.64 MJ/kg with 60 min pyrolysis time.As the pyrolysis reaction proceeded,volatile content in samples was separated out and the products reduced,the ash content in the products increased accordingly,which led to a decrease in heating value after pyrolysis.The experimental results of pyrolysis within 30 min and 60 min showed that pyrolysis temperature has a more significant effects on the characteristics of products than the pyrolysis time did.