摘要
采用中试回转窑热解装置对废轮胎进行了热解研究.在450～650℃热解试验温度范围内,热解炭产率约为39%～44%.热解炭的工业及元素分析显示,热解炭中灰分含量高达10%以上;含量最多的金属元素是Zn和Fe;热解炭S含量2.2%～2.6%左右,轮胎原料中S元素约75%残留在热解炭中,因此热解过程中排放出的气体硫化物很少.此外,探讨了热解炭孔容积分布和温度对比表面积的影响.在450～550℃,热解炭比表面积随热解温度升高而增大;温度继续升高,比表面积变化不大.在孔半径约为25nm处,热解炭比孔容积有最大值.
Pyrolysis of scrap tire was studied in a pilotscale rotary kiln. In all runs of temperature between 450 ℃ and 650 ℃, the mass yield of pyrolytic char was about 39%～44%. The proximate and ultimate analyses of char were given. Ash content in char is more than 10%, and Zn and Fe are the most abundant metal element. S element is about 2.2%～2.6%, which amounts about 75% of that of tire feedstock. The pore volume distribution and surface area of char were investigated. The surface area of pyrolytic char increases as temperature arises from 450 ℃ to 550 ℃, while surface area is relatively stable at higher temperature. The maximum pore volume of char occurs at 25 nm pore diameter.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2003年第2期186-189,共4页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(50076037).
关键词
废轮胎
热解
回转窑
热解炭
中试
scrap tire
pyrolysis
rotary kiln
pyrolytic char
pilot-scale
