神木煤显微组分热解和加氢热解的焦油组成

利用色谱-质谱联用技术测定了神木煤镜质组和惰质组在不同热解条件下焦油的组成，考察了显微组分类型和反应气氛对苯类、酚类、萘类、含氧杂环和多环芳烃类化合物产率的影响。结果表明，惰质组和镜质组焦油在组成和长链烃类、芳烃、含氧杂环和多环芳烃的相对质量分数方面存在很大差异。镜质组焦油中长链烃类的种类和相对质量分数较高，惰质组焦油中芳烃、含氧杂环和多环芳烃的种类和相对质量分数较高，反映了镜质组显微组分芳香度较低以及烷基侧链长和多以及惰质组稠环芳烃结构多和芳环缩聚程度高的特点。加氢热解比热解有较高的焦油收率，随氢气压力的增加，焦油的收率大幅度增加。镜质组和惰质组热解和加氢热解焦油组成和相对质量分数的差异反映了热解过程中氢气的加氢稳定化作用和加氢裂解作用。

Compositions of coal tar from pyrolysis and hydropyrolysis of Shenmu coal macerals

To understand the relationship of the tar compositions and the coal macerals, the tars obtained from the pyroloysis and hydropyrolysis of Shenmu coal macerals in a fixed-bed reactor were analyzed using GC-MS.And the effects of petrographic component, atmosphere and pressure on the yield of aromatic hydrocarbon, phenols, hydrocarbons, oxygen-containing heterocycle and PAHs were systematically investigated. The results show that there is great difference in the composition and the relative content of long chain hydrocarbon, aromatic hydrocarbon, phenols, oxygen-containing heterocycle and PAHs in tars from vitrinite and inertinite pyrolysis. Vitfinite tar contains high content of hydrocarbon with long chain, and inertinite tar contains high content of aromatic hydrocarbon, phenols, oxygen-containing heterocycle and PAHs. It suggests that vitrinite has lower aromaticity and longer chain in its structure than inertinite, which is in well agreement with the result from ^13C NMR and FT-IR test. The tar yield of hydropyrolysis is higher than that of pyrolysis. With increasing the hydrogen pressure, the yield of tar increases greatly. The content of phenols and naphthalenes in vitrinite tar from hydropyrolysis under 0.1 MPa is much lower than that from pyrolysis, while that of internite tar changes a little. The difference of tar composition and relative content during pyrolysis and hydropyrolysis reflets the effect of hydrogeneration and hydrocarcking reactions and the structure characteristics of the macerals.