| 加拿大油砂沥青减压渣油在CO/H2-H2O作用下的热改质特性研究 |
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| 引用本文： | 刘贺,王宗贤,赵翔鵾,李玉星,陈坤,郭爱军.加拿大油砂沥青减压渣油在CO/H2-H2O作用下的热改质特性研究[J].燃料化学学报,2018,46(1):45-53. |
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| 作者姓名： | 刘贺 王宗贤 赵翔鵾 李玉星 陈坤 郭爱军 |
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| 作者单位： | 1. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum(East China), Qingdao 266580, China;
2. College of Pipeline and Civil Engineering, China University of Petroleum(East China), Qingdao 266580, China |
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| 基金项目： | 国家自然科学基金（21776313），中国博士后科学基金资助项目（2016M602219），山东省自然科学基金博士基金（ZR2017BB021），青岛市博士后应用研究项目（2016224），重质油国家重点实验室资助项目（SLKZZ-2017003，SLKZZ-2017011），山东省重点研发发展计划（2017GGX70108），中央高校基本科研业务费专项资金（科技专项，17CX05016），中国石油科技创新基金（2017D-5007-0506），中国石油天然气股份有限公司攻关项目（PRIKY16066）和山东省博士后创新项目专项资金（201702028）资助 |
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| 摘 要： | 以加拿大油砂沥青大于420℃的减压渣油（BVR）为原料，对比研究其在CO/H2-H2O和N2体系中的热改质特性，通过系统分析BVR在H2-H2O、CO-H2O、N2-H2O等不同氢源下的热改质特性以揭示CO/H2-H2O对渣油热改质的作用机制，最后探讨合成气压力、含水量以及温度对BVR临CO/H2-H2O改质生焦倾向的影响。结果表明，与临氮改质相比，相同反应条件下，合成气和水可使BVR热改质的生焦诱导期延长3.5-6.5 min；相同生焦率（约0.1%）时，合成气和水可显著提升BVR热改质降黏率，410℃时相对临氮改质的降黏率为29.1%，而420℃时可达54.6%。比较不同氢源下BVR热改质的生焦诱导期、改质油黏度和安定性、渣油转化率发现，H2-H2O、CO-H2O、N2-H2O等均对BVR热改质表现出与CO/H2-H2O相同的促进效果，各氢源作用活性的大小顺序为H2-H2O > CO/H2-H2O > CO-H2O > N2-H2O。由此可知，CO/H2-H2O对渣油热改质的促进作用可归因于氢气、CO水热变换新生氢和水热裂解的综合效应，且其中氢气的作用仍最显著。合成气压力、含水量和反应温度可通过影响不同氢源的贡献而调控BVR临CO/H2-H2O改质生焦倾向。低成本易获取的合成气可以提供BVR热降黏改质所需氢源，水能够通过CO水热变换反应供出新生活泼氢而协同合成气实现BVR高效改质。
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| 关 键 词： | 油砂沥青 合成气 水热裂解 活泼氢 降黏改质 |
| 收稿时间： | 2017-09-27 |
Partial upgrading of vacuum residue from Canadian oil sand bitumen under CO/H2-H2O |
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| LIU He,WANG Zong-xian,ZHAO Xiang-kun,LI Yu-xing,CHEN Kun,GUO Ai-jun.Partial upgrading of vacuum residue from Canadian oil sand bitumen under CO/H2-H2O[J].Journal of Fuel Chemistry and Technology,2018,46(1):45-53. |
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| Authors: | LIU He WANG Zong-xian ZHAO Xiang-kun LI Yu-xing CHEN Kun GUO Ai-jun |
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| Abstract: | The upgrading of the vacuum residue from Canadian oil sand bitumen was performed in a batch reactor with the syngas (CO/H2) and H2O. The effect of CO/H2-H2O for residue upgrading was verified. In the presence of CO/H2-H2O, the coke induction period is postponed by 3.5-6.5 min. When the coke yield is about 0.1%, the viscosity reduction efficiency can be raised by 29.1% at 410℃ and even 54.6% at 420℃. The upgrading experiments were also carried out in the presence of N2-H2O, CO-H2O, and H2-H2O, respectively. The results show that the capability to inhibit the coke formation was in the order of H2-H2O > CO/H2-H2O > CO-H2O > N2-H2O. The impetus of CO/H2-H2O to BVR upgrading could be attributed to the active hydrogen mainly from H2, nascent hydrogen by water-gas shift reaction as well as aqua-thermolysis. The thermal conditions such as the pressure of syngas, water content and reaction temperature could influence the coking propensity of BVR under CO/H2-H2O by affecting the three different attributions. These results indicate that the more accessible and low-cost syngas could provide the necessary hydrogen for BVR upgrading. Water presents a synergism with syngas for further promoting the BVR upgrading process. |
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| Keywords: | oil sand bitumen syngas aqua-thermolysis active hydrogen thermal upgrading |
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