摘要
针对典型的无烟煤(阳泉煤)和褐煤(凤水沟煤),采用层流床反应器进行了800～1,200,℃高温热解研究,得到了主要气体产物的动态析出特性及碳、氢和氮元素析出规律.NH3、HCN、CH4、CO、C2H4和C2H2等成分在热解前期和中期析出,而H2析出主要发生在热解中后期.凤水沟煤HCN析出得早且快,析出浓度大于阳泉煤.热解气中水含量、氧元素和氢元素含量远高于原煤.在热解气主要可燃成分中,阳泉煤析出的H2多,凤水沟煤析出的则以CO居多.随热解温度升高,热解气中碳氢元素质量比减少,氢氮元素质量比增加;凤水沟煤的碳氧元素质量比减小;阳泉煤的碳氧元素质量比先增大后减小.
Experiments are carried out on Yangquan coal （a kind of arthracite）and Fengshuigou coal （a kind of lignite） in a layer-flow bed reactor to study the characteristics of the main pyrolysis gases and the elements releasing performance in the pyrolysis process at 800-1 200℃. The gases, such as NH3、HCN、CH4、CO、C2H4and C2H2, release in the prophase and metaphase of the pyrolysis process, while Hz is released in the metaphase and anaphase. Compared with Yangquan coal, HCN is released earlier and faster with greater concentration from Fengshuigou coal than from Yangquan coal. The contents of vapor, oxygen element and hydrogen element in the pyrolysis gases are higher than those in the primary coal. Of the pyrolysis gases, the majority of combustible component is hydrogen gas in the case of Yangquan coal, while that is carbon oxygen in the case of Fengshuigou coal. As pryrolysis temperature increases, the ratio of carbon to hydrogen decreases, the ratio of hydrogen to nitrogen increases, and the ratio of carbon to oxygen decreases in the case of Fengshuigou coal but increases then decreases in the case of Yangquan coal.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2011年第1期24-28,共5页
Journal of Combustion Science and Technology
基金
国家高技术研究发展计划(863计划)资助项目(2009AA05Z301)
关键词
煤粉
热解
氮析出
无烟煤
pulverized coal
pyrolysis
N-releasing
anthracite
