CIESC Journal ›› 2019, Vol. 70 ›› Issue (10): 4012-4020.DOI: 10.11949/0438-1157.20190612

• Energy and environmental engineering • Previous Articles     Next Articles

Effect of asphaltene contents on hydrogen solubility in heavy oils

Xiang BAI1(),Run GUO1,Zhaopeng ZENG2,Zhentao CHEN1(),Linzhou ZHANG1,Zhiming XU1,Chunming XU1,Suoqi ZHAO1()   

  1. 1. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
    2. China Global Engineering Co. Ltd. Beijing Branch, Beijing 100012, China
  • Received:2019-06-02 Revised:2019-09-18 Online:2019-10-05 Published:2019-10-05
  • Contact: Zhentao CHEN,Suoqi ZHAO

沥青质含量对重油中氢气溶解度影响的研究

白翔1(),郭润1,曾招朋2,陈振涛1(),张霖宙1,许志明1,徐春明1,赵锁奇1()   

  1. 1. 中国石油大学化学工程学院重质油国家重点实验室,北京102249
    2. 中国寰球工程有限公司北京分公司,北京100012
  • 通讯作者: 陈振涛,赵锁奇
  • 作者简介:白翔(1981—),女,博士研究生,baixiang911@126.com
  • 基金资助:
    国家自然科学基金项目(21878329)

Abstract:

Hydrogen is an important reaction component in the oil hydrogenation process, and its solubility in petroleum fractions is a key factor affecting the hydrogenation process. Nevertheless, the sets of data for hydrogen solubility in heavy oils are scarce in literatures, and especially no attention has been paid on the influence of asphaltene on the hydrogen solubility in heavy oils. The solubility of hydrogen in four heavy oil feedstocks was systematically studied by high pressure stirred tank. The variation of hydrogen solubility in heavy oil with temperature and pressure was obtained. The effect of asphaltene content on hydrogen solubility was investigated. It was found that hydrogen solubility in certain oil increased with temperature and pressure under the present measurement conditions. The hydrogen solubility was influenced more significantly by temperature under higher pressure and pressure under higher temperature. The Flash module in Aspen Plus is combined with the PR state equation to establish a hydrogen solubility calculation model, and the hydrogen solubility under high temperature conditions is predicted. The results indicate the contradiction between hydrogen solubility and hydrogen consumption in vacuum residue of Canadian oil sand bitumen is much serious under conventional hydrogenation conditions. The hydrogen solubility of the deasphalted oil is greatly improved, and the removal of resin and asphaltene alleviates the contradiction between hydrogen dissolution and hydrogen consumption.

Key words: hydrogen solubility, heavy oil, asphaltene, PR equation of state

摘要:

氢气是油品加氢工艺中重要的反应组分,其在石油馏分中的溶解性能是影响加氢工艺过程的关键因素。重油中氢气溶解度的数据较为匮乏,尤其是重油中沥青质组分对氢气溶解度的影响并未受到关注。采用高压搅拌釜对氢气在四种重油原料中的溶解度进行系统研究,获得了氢气在重油中溶解性能随温度和压力的变化规律,并考察了沥青质含量对氢气溶解性能的影响。结果表明,氢气在相同重油原料中的溶解度随温度和压力的升高而增大,并且在较高温度或压力条件下,压力或温度变化对氢气溶解性能的影响更加显著。利用Aspen Plus中的Flash模块结合PR状态方程建立氢气溶解度计算模型,并进行高温条件氢气溶解度的预测,表明常规加氢条件下加拿大油砂沥青减渣中氢气溶解度与氢耗之间的矛盾极为尖锐,其脱沥青油的氢气溶解性能得到较大改善,胶质和沥青质的脱除缓解了氢气溶解和氢耗之间的矛盾。

关键词: 氢气溶解性, 重油, 沥青质, PR状态方程

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