稠油的可控氧化热采:MnO2催化剂上的重油低温氧化分解行为

doi:10.1016/S1872-2067(14)60236-9

催化学报 ›› 2015, Vol. 36 ›› Issue (2): 153-159.DOI: 10.1016/S1872-2067(14)60236-9

稠油的可控氧化热采:MnO₂催化剂上的重油低温氧化分解行为

樊铖, 张强, 魏飞

清华大学化学工程系, 绿色反应工程与工艺北京市重点实验室, 北京100084

收稿日期:2014-08-16 修回日期:2014-09-29 出版日期:2015-01-21 发布日期:2015-01-21
通讯作者: 张强
基金资助:
国家自然科学基金(21422604);中石油油气田开发专项(2011A-1006).

Controllable oxidation for oil recovery: Low temperature oxidative decomposition of heavy oil on a MnO₂ catalyst

Cheng Fan, Qiang Zhang, Fei Wei

Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:2014-08-16 Revised:2014-09-29 Online:2015-01-21 Published:2015-01-21
Supported by:
The work was supported by the National Natural Science Foundation of China (21422604) and the PetroChina Technology R&D Project on New Technology and Method for Oil & Gas Development (2011A-1006).

摘要/Abstract

摘要：

采用MnO₂纳米催化剂促进稠油重组分的低温氧化裂解及高温氧化生热, 进而促进火烧油层技术在超稠油油藏开发中的应用, 提高火烧油层技术的采收率. 结果表明, MnO₂促进了稠油的低温裂解, 高温生热量并不随燃料沉积量的减少而降低. MnO₂的加入促进了低温下小分子的生成, 并使高温氧化反应更加温和, 提高了高温产物的氧化度. 相比无催化剂的氧化反应, MnO₂使稠油的低温氧化和高温氧化的表观活化能分别降低了10-30 kJ/mol和20-40 kJ/mol.

关键词: 二氧化锰, 火烧油层, 氧化裂解, 燃料沉积

Abstract:

Heavy oil is a readily available alternative energy resource with a reserve that is more than twice that of conventional light oil. In situ combustion is one of the most promising strategies for heavy oil exploitation, and the modulating of the oxidation behavior of heavy oil is an efficient way to expand the applicability of the in situ combustion method. MnO₂ nanoparticles were employed to facilitate the cracking of heavy compounds, promote heat production, and improve recovery efficiency. The oxidative decomposition rate of heavy oil was doubled in the low temperature interval, and the heat release rate was accelerated in the high temperature interval. The increased weight loss at low temperature was attributed to the decomposition of heavy components. The detection of incomplete oxidation products by mass spectroscopy under excessive oxygen flow at high temperature indicated a diffusion controlled process of oil combustion. The same amount of CO₂ from the combustion of less fuel demonstrated an increased oxidation degree of the products. The apparent activation energies of the oxidation reactions were decreased by 10-30 kJ/mol at low temperature and 20-40 kJ/mol at high temperature by the addition of MnO₂. MnO₂ can render in situ combustion more feasible for various oil reservoirs, and is also promising for other thermal recovery processes for improved oil recovery.

Key words: Manganese dioxide, In situ combustion, Oxidative decomposition, Fuel deposition

樊铖, 张强, 魏飞. 稠油的可控氧化热采:MnO₂催化剂上的重油低温氧化分解行为[J]. 催化学报, 2015, 36(2): 153-159.

Cheng Fan, Qiang Zhang, Fei Wei. Controllable oxidation for oil recovery: Low temperature oxidative decomposition of heavy oil on a MnO₂ catalyst[J]. Chinese Journal of Catalysis, 2015, 36(2): 153-159.

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稠油的可控氧化热采:MnO₂催化剂上的重油低温氧化分解行为

Controllable oxidation for oil recovery: Low temperature oxidative decomposition of heavy oil on a MnO₂ catalyst

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