Taryield increases with the increase of volatile matter yield of brown coal in different ages.
焦油产率系随着不同时代褐煤挥发分产率的增多而增加。
2
Using catalyst is an available and economic method to improve the quality of small-molecule combustible gas, increase the biomass utilization efficiency and decrease the taryield.
使用催化剂是一种可以提高小分子可燃气体品位、提高生物质利用效率、减少焦油产生的经济可行的办法。
3
Smoking cigarettes that have a lower yield of tar does not substantially reduce the risk for lung cancer.