1. 西安理工大学印刷与包装学院,西安,710048
2. 西安交通大学热流科学与工程教育部重点实验室,西安,710049
网络首发:2015-05-10,
纸质出版:2015
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王玉珍 1, 2, 王树众 2, 等. 超临界CO2萃取油泥砂中柴油的可行性及经济性分析[J]. 西安交通大学学报, 2015,49(5):128-133. DOI: 10.7652/xjtuxb201505020.
Feasibility and Economic Analysis of Diesel Oil Extraction from Oiled-Sand by Supercritical CO2 Process[J]. 2015, 49(5): 128-133. DOI: 10.7652/xjtuxb201505020.
为了对超临界CO
2
萃取油泥砂中柴油的可行性及经济性进行分析
根据文献数据获得了物质在超临界CO
2
中的溶解度与其萃取率的关系曲线
发现当溶解度大于25 g/(100 g)时
萃取效率高达98%。采用Aspen软件对柴油中的主要化合物C
10
~C
20
的超临界CO
2
萃取过程进行了模拟
分析了操作压力、萃取时间、CO
2
流量对萃取率的影响
优化了反应条件。结果表明
在温度为35 ℃、压力为20 MPa、萃取时间为180 min、CO
2
流量为60 kg/h、甲醇与CO
2
的流量比为0.3的条件下
柴油中C
10
~C
20
的萃取率高达95%。对20 t/d处理量的超临界CO
2
萃取系统的技术经济性分析表明:建设投资为1 500万元
处理含油量(质量分数)21%的油泥砂的收益为2.4万元/d
2年内即可收回投资; 利用超临界CO
2
萃取油泥砂中的柴油不仅可以解决当前的油泥砂污染问题
而且可以有效回收柴油
缓解目前日趋紧张的油气供需关系。
To analyze the feasibility and economy of diesel oil extraction by supercritical CO
2
from oiled-sand
the relationship curve between the solubility in supercritical CO
2
and the extraction efficiency was obtained according to the corresponding references and experimental data. Results show that when the solubility is more than 25 g/(100 g)
the extraction efficiency can reach 98%. Aspen software was used for simulating the extraction efficiency of the main compounds of C
10
~C
20
in diesel
oil
and the operation parameters such as pressure
extraction time and CO
2
flow rate were optimized. It is shown that at the condition of 35 ℃
20 MPa
extraction time of 180 min
CO
2
flow rate of 60 kg/h and methanol to CO
2
ratio of 0.3
the extraction efficiency of the C
10
~C
20
compounds can reach 95%. The technical and economic analyses of a 20 t/d supercritical CO
2
extraction system show that the construction investment is 15 million yuan
and 24 000 yuan can be earned per day when the oiled-sand with an oil mass fraction of 21% is treated by this system. So the initial construction investment can be recovered in two years. The supercritical CO
2
extraction process can not only solve the pollution problem of the existing oiled-sand
but also recover the diesel oil effectively
thus alleviating the increasingly tense supply-demand relationship of oil and fuel gas.
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