摘要
用内蒙扎赉诺尔褐煤在气流床反应器中进行快速加氢热解的研究.在6.OMPa、700℃、氢气载气在反应器内的停留时间为7～71s范围内,总生成物产率随停留时间增加而提高,停留时间达42s时,液态轻质芳烃(三苯+三酚)出现最大值达13.5%,比短停留时间的产率增加了1.6倍;71s时,气态和气、液态生成物总产率分别为31.6%和42.1%.随气体停留时间的增加,气态和液态轻质芳烃产率的提高与焦油量的减少和半焦中残留挥发分的降低有密切关系.在快速热解过程中,加氢二次反应不可避免,且对气、液生成物的产率和产物分布有重要影响.载气停留时间是控制二次反应的重要手段.
The flash hydropyrolysis (FHP) of Zalannoer brown coal of Inner Mongolia is carried out in an experimental entrained reactor. The total yield of products increase with the gas residence time (GRT) at 6. OMPa of hydrogen pressure and 700℃ of temperature and a range of 7-71 s GRT. When GRT is 42 s, the yield of hydrocarbon liquid (HCL) is a maximum of 13. 5% which is 1. 5 times more than that at a short GRT(2 s). The yield of gaseous products and total yield (gaseous products+HCL) are 31. 6% and 42. 1% respectively when GRT is 71 s. It is found that the increase of yields of gaseous products and HCL is closely related to the decrease of tar and volatile matter of char. During the process of FHP, secondary reaction of gaseous is unavoidable and it has an important effect on yields and distribution of gaseous and liquid products. The GRT plays an important role in controlling the secondary reaction.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1995年第6期710-716,共7页
CIESC Journal
基金
国家自然科学基金资助项目
关键词
褐煤
热解
气体停留时间
液态烃
气态烃
煤
brown coal, flash hydropyrolysis, gas residence time, secondary hydrogenation
