煤在H2/Ar等离子体热解过程中脱氮脱硫的研究

对几种中国煤在H₂/Ar等离子体热解过程中的脱氮脱硫进行了实验研究，结果表明:煤中氮在H₂/Ar等离子体热解过程中主要以HCN形式存在，也有少量氮转化为NH₃，脱氮率最高达50%；HCN的产率随煤种和输煤速率的变化而变化，NH₃的产率随输煤速率的增大变化不大，与煤种没有一定的对应关系；HCN的产率大于煤常规加氢热解，而NH₃产率(<1.5%)则相反；煤中氧含量较高时，HCN和NH₃的产率较低；煤中硫转化生成的H₂S产率随输煤速率的变化而变化，脱硫率最高达60%左右，煤等离子体热解反应后得到的焦样n(N)/n(C)和n(S)/n(C)都小于原煤. 

Denitrogenation and desulphurization during hydropyrolysis of coal in H2/Ar plasma jet

The denitrogenation and desulphurization during hydropyrolysis of six Chinese coals were systematically investigated in H2/Ar plasma jet.The results from experiments show that HCN is the main product of coal-N at high temperature.Only low amount of NH3 is formed.Yield of HCN depends on coal types and coal feeding rate,but NH3 doesn't change obviously.Yields of HCN and NH3 decrease with the increase of oxygen contents in coal during hydropyrolysis in H2/Ar plasma jet.The change of feeding rate affects significantly the formation of H2S from the conversion of coal-S.The mole ratios of n(N) / n(C) and n(S) / n(C) in all char samples are less than that of coal.Meanwhile,the results suggest that hydropyrolysis in H2/Ar plasma jet is an efficient method for denitrogenation and desulphurization.In present experimental conditions,the denitrogenation and desulphurization percentages reach up to 50% and 55% for Yanzhou coal,respectively.Yima coal can reach up to 40% and 60%.