本文選題：脫金屬 + 自組裝��； 參考：《華東理工大學》2017年碩士論文

【摘要】：在溫度653和663K、水密度0.10～.30g/cm~3、和水油比2:1～6:1(vol.)的超臨界水(supercritical water,SCW)環(huán)境中實驗研究了重質(zhì)油的熱裂化,對于反應產(chǎn)物進行表征和集總反應動力學分析。實驗結果表明在較高的水密度和水油比條件下,重質(zhì)油的熱裂化從傳統(tǒng)的油相轉(zhuǎn)移到SCW水相過程中。相較于在油相中的裂化,重質(zhì)油在SCW環(huán)境中裂化速率顯著提高,并且這種加速效應受到水熱力學條件的影響。受芳香片層之間π-π相互作用和SCW良好的分散作用的影響,富含金屬的重芳烴能夠快速在SCW環(huán)境中發(fā)生不同規(guī)模的聚集和自組裝。芳烴在SCW中的自組裝行為不僅取決于SCW的熱力學狀態(tài),也受到芳烴分子規(guī)模的影響。重質(zhì)油各組分中重芳烴具有較大的分子規(guī)模和較高的稠環(huán)度,同時耦合重質(zhì)油中含有的絕大部分金屬,得益于在SCW環(huán)境中較強的自組裝趨勢,富含Ni和V的最重芳烴在SCW中優(yōu)先發(fā)生團聚及縮合。在重芳烴發(fā)生優(yōu)先縮合的同時將含Ni和V的組分優(yōu)先從液相產(chǎn)物中分離出去。由于芳烴差異化的類焦自組裝趨勢,在SCW中進行的重質(zhì)油裂化能夠獲得良好的金屬脫除率和高液收率。
[Abstract]:At temperatures of 653 and 663K, the density of water is 0.10g / cm ~ (-3), and the ratio of water to oil is 2: 1: 6: 1 (vol.). The thermal cracking of heavy oil was studied experimentally in supercritical water environment. The reaction products were characterized and the lumped reaction kinetics was analyzed. The experimental results show that the thermal cracking of heavy oil is transferred from traditional oil phase to SCW water phase at high water density and water-oil ratio. The cracking rate of heavy oil in SCW environment was significantly higher than that in oil phase, and the acceleration effect was affected by the thermodynamic conditions of water. Under the influence of 蟺-蟺 interaction between aromatic lamellae and good dispersion of SCW, metal-rich heavy aromatics can rapidly aggregate and self-assemble in SCW environment on different scales. The self-assembly behavior of aromatics in SCW depends not only on the thermodynamic state of SCW, but also on the molecular scale of aromatics. The heavy aromatics in each component of heavy oil have larger molecular scale and higher dense ring degree, and coupled with most of the metals contained in heavy oil, because of the strong self-assembly trend in SCW environment, The heaviest aromatics rich in Ni and V are preferentially agglomerated and condensed in SCW. At the same time, the components containing Ni and V were separated from the liquid products prior to the condensation of heavy aromatics. Due to the tendency of aromatics differential coke-like self-assembly the heavy oil cracking in SCW can obtain good metal removal rate and high liquid yield.
【學位授予單位】：華東理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE624.5

【參考文獻】

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本文編號：2113610