Increasing the residence time of the volatile matter, the yield of tar is decreased and that of gas is increased.
随着挥发物停留时间的增加，其焦油收率均下降，而气体收率则上升。
The experimental results proved that with the input of the limestone the yield of tar decreased and the yield of gas increased and the quality of the gas was also improved.
结果表明，石灰石的加入降低了焦油产率，提高了煤气产率，改善了煤气质量。
Calcium oxide in circulating ash is favorable to decrease the yield of tar and increase the yield of gas in partial coal gasification process with the circulating fluidized bed technology.
在以循环床锅炉循环灰为热载体、部分气化产生的半焦为锅炉燃料的煤的部分气化技术中，循环灰中的氧化钙对降低焦油产率、提高煤气产率是有利的。
Smoking cigarettes that have a lower yield of tar does not substantially reduce the risk for lung cancer.
吸那些焦油含量较低的香烟本质上不能降低癌症风险。
The yield of both tar and gas is decreased with the decrease of exhausting temperature of liberated matter.
降低挥发物的出口温度，可以降低焦油和气体收率。
Tar yield 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。
Yield of wood-vinegar prepared from the treated wood tended to increase, and yield of charcoal indicated opposite tendency, but yield of wood-tar was almost constant.
与没有处理相比，虽然处理过边材的木焦油的收率几乎不变，木醋液的收率显示增加倾向，但是木炭的收率有减少迹象。
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 tar yield.
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。
The coke yield of pitches from different tar sources is expressed as a linear function of the BI content.
从不同焦油中得到的沥青结焦率与BI含量呈线性关系。
It is shown in the experimental results that the yield of pyrolysis gas increases as the pyrogenation temperature and the rate of heat increase, while those of tar and char decrease.
升温速率增加，热解气得率增加，且气体中的可有效可燃成分在增加。
It is shown in the experimental results that the yield of pyrolysis gas increases as the pyrogenation temperature and the rate of heat increase, while those of tar and char decrease.
升温速率增加，热解气得率增加，且气体中的可有效可燃成分在增加。
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