不同馏分及渣油在临氢热改质过程中供氢能力研究

HYDROGEN DONATING ABILITY OF PETROLEUM DISTILLATES AND RESIDUES IN VISBREAKING UNDER HYDROGEN

为了考察重油在临氢热改质过程中的供氢能力,将委内瑞拉原油切割为3个馏分及渣油作为油样,蒽作为夺氢探针,分别研究了氢气、油样以及油样临氢体系的供氢能力,采用反应叠加法分析了临氢热改质过程中油样与氢气之间的协同效应,间接考察了油样组成结构对氢分子活化的影响。结果表明:油样中烷烃、环烷烃以及环烷、芳香结构对油样的供氢能力有积极影响;临氢条件下,整个反应体系的供氢能力较油样和氢气单独供氢能力之和提升一倍左右,可见油样与氢气之间存在着积极的协同效应。另外,从油样性质的差异性角度分析,油样组成,如多环芳烃、硫、金属等,对氢分子的活化有着促进作用。

In order to study the hydrogen donating ability of heavy oils in upgrading process under hydrogen,Venezuela crude oil was cut into three distillates and residue.The hydrogen donating abilities of hydrogen,oil samples,and oil samples under hydrogen atmosphere were determined by using anthracene as a probe.Superposition method was used to analyze the synergic effects between oil sample and hydrogen.The effects of oil composition and structure on activation of hydrogen were studied indirectly.The results showed that the content of alkanes,naphthenes as well as tetrahydro-naphthalene had a positive impact on hydrogen donating ability of oils;the hydrogen donating ability of the whole reaction system under hydrogen was about 100%higher than the sum of hydrogen donating ability of hydrogen and oil respectively,indicating the positive synergism between hydrogen and oil.In addition,the difference of oil composition,such as polycyclic aromatics,sulfur and metals,could promote the activation of hydrogen molecule.