共查询到19条相似文献,搜索用时 62 毫秒
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丁斌 《石油学报(石油加工)》1990,6(4):105-108
本文提出一套基团参数,用基团贡献法估算烃类混合物临界温度.所研究的混合物有:甲烷(1)-乙烷(2)-丙烷(3)、甲烷(1)-乙烷(2)-正丁烷(3)、甲烷(1)-乙烷(2)-正戊烷(3)、甲烷(1)-丙烷(2)-正戊烷(3)、甲烷(1)-正丁烷(2)-正癸烷(3).临界温度的绝对偏差平均值为5.131K,相对偏差平均值为1.394%. 相似文献
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通过对 2 5 7种有机物临界体积的回归 ,建立了一种新的基团贡献法。其计算结果与实验值的平均偏差小于文献报道的其它基团贡献法。此法亦能用来预测长碳链的直链烷烃和烷基酮的临界体积。 相似文献
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高聚物的溶度参数概念及其溶剂的精确选配方法 总被引:2,自引:0,他引:2
针对非极性或弱极性聚合物的溶解 ,以溶度参数理论为依据 ,利用电子计算机对 44种溶剂进行了组合和筛选 ,研制出与目标溶剂具有相同溶解能力的混合溶剂。结果表明 ,利用溶度参数理论的精确算法 ,可以快速、准确的选择性能更为理想的混合溶剂。 相似文献
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人工神经网络基团贡献法预测有机物闪点 总被引:1,自引:1,他引:0
建立了一个基于误差反向传播(Back-Propagation,BP)神经网络方法的基团贡献模型,用于预测有机物闪点。以32种分子基团作为神经网络的输入参数,闪点作为输出,研究有机物闪点与分子结构之间的相关性。实验样本由258种有机物构成,并随机划分为训练集(216种)和预测集(42种)。通过试差法确定神经网络最优参数,应用最优BP网络结构(32-4-1)进行模拟,结果表明,闪点预测值与实验值符合良好,绝对平均绝对误差6.22K,绝对平均相对误差2.24%,优于传统基团贡献法所得结果。该方法的提出,不仅揭示了有机物闪点与分子结构之间的定量关系,而且为工程上提供了一种预测有机物闪点的新的有效方法。 相似文献
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选择3种分散剂甲醇(M)、丙酮(A)和四氢呋喃(T),以及3种分散剂分别与离子液体1-丁基-3-甲基咪唑四氟硼酸盐([BMIM]BF4)组成的混合溶剂甲醇/[BMIM]BF4(M-ILs)、丙酮/[BMIM]BF4(A-ILs)和四氢呋喃/[BMIM]BF4(T-ILs)对新疆烟煤(CR)进行溶胀处理,研究了不同溶剂溶胀对煤样溶解度参数及液化效能的影响。扫描电镜分析结果表明,CR经6种溶剂溶胀后微观形貌均呈现不同程度的疏松。溶解度参数测试结果表明:溶剂与CR之间的溶解度参数的差值越小,溶剂对煤样的溶胀效果越好;所得溶胀煤样的溶解度参数越低,溶胀煤样的液化性能越好。同时,分散剂与离子液体[BMIM]BF4共同作用更有利于煤的溶胀,3种混合溶剂M-ILs、A-ILs和T-ILs对CR的溶胀效果比对应的单一分散剂M、A和T对CR的溶胀效果分别高出9.65%、14.28%和11... 相似文献
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Abstract In this research, the density of the components of some crude oil samples, analyzed based on the Saturates, Aromatics, Resins, and Asphaltenes (SARA) method, has been estimated by Peng-Robinson (PR), Soave-Redlikh-Kwong (SRK), and new equations of state (EOS). The obtained results from the New EOS have been compared with those values obtained by PR and SRK, which showed better compatibility with the experimental data available. Then, the density and the solubility parameters of a different crude oil sample were estimated by the New EOS. 相似文献
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The performance of four formulated solvents(labeled as UDS-I, UDS-II, UDS-III, and UDS-IV) for removing methyl mercaptan from liquefied petroleum gas was predicted based on a two-dimensional solubility parameter theory. The calculation results show that UDS-IV has the closest solubility parameter to that of methyl mercaptan as compared with other tested solvents, indicating the strongest affinity and the highest solubility for methyl mercaptan. The industrial tests at a plant for desulfurization of LPG produced from the delayed coker have shown that the UDS solvents have the excellent performance for removal of organosulfur compounds(mainly methyl mercaptan). Although the sulfur loading dramatically increases, the total sulfur content of LPG treated with UDS-IV can be reduced by about 50% in comparison with N-methyl diethanolamine. In addition, UDS-IV has superior regeneration performance and selectivity for sulfur compounds over hydrocarbons. The industrial test and the solubility parameter calculation results are in good agreement with each other. 相似文献
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Ԥ���������ز����ʵķ��� 总被引:1,自引:0,他引:1
本文根据物质平衡原理,对于定容和水驱凝析气藏提出了预测采收率的方法,并提出了凝析气藏的总采收率与干气和凝析油采收率的关系式。 相似文献
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David C. Santos Sofia D. Filipakis Eduardo R. A. Lima 《Petroleum Science and Technology》2019,37(13):1596-1602
In a previous study we obtained reference values of solubility parameter of two Brazilian crude oils based on asphaltene flocculation data. In this work, these reference values were compared to those obtained by nine models available in the literature and oil compatibility data were experimentally obtained to enhance the modeling evaluation. These evaluations allowed to select models to predict asphaltene stability and oil compatibility. As a result, only our method along with three other methods can accurately predict the experimental results of the compatibility between oil mixtures, and the conclusion is that usually recommended models are not the best choice. 相似文献
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采用分子动力学模拟方法,计算了超临界CO2和超临界CO2-乙醇体系的溶解度参数,并分析了体系内粒子间距离的径向分布函数。结果表明,超临界CO2的溶解度参数随温度的升高而减小,随压力的增大而增大,且随体系密度的增大而线性增大;添加乙醇可明显提高超临界CO2的溶解度参数,且随着乙醇浓度的增加,在相同条件下的溶解度参数也增大。乙醇分子可与CO2分子形成分子间氢键而提高CO2的极性,从而提高体系的溶解度参数;超临界CO2-乙醇体系中,分子间,特别是乙醇分子间存在聚集现象。当体系压力较低时,增大压力,可大幅度减弱乙醇分子间的聚集程度,使体系的溶解度参数迅速增大;但继续增大压力到一定程度时,乙醇分子间的聚集程度达到定值,即乙醇已均匀分散在CO2中,溶解度参数随压力的变化趋于平缓。 相似文献