共查询到20条相似文献,搜索用时 203 毫秒
1.
原油减压渣油馏分的油-水界面性质I. 伊朗重质减渣馏分的油-水界面张力 总被引:7,自引:6,他引:1
采用超临界萃取分离技术对伊朗重质减压渣油按相对分子质量进行了分割。所得伊朗重质减渣馏分按馏分的先后,其平均相对分子质量逐渐增大,H/C原子比逐渐下降,芳香共轭成分含量逐渐升高。对各减渣馏分的油-水界面张力研究表明,伊朗重质减渣馏分具有高的界面活性,随着减渣馏分在油相中质量分数的增大,油-水界面张力显著下降。通过改变减渣馏分的界面吸附状态和吸附量,油相组成、水相中盐的含量及pH值的变化会影响油-水界面张力。 相似文献
2.
我国石油比较短缺,对数量可观的劣质重油和低阶煤进行共加氢生产燃料油和精细化学品具有重要意义。以煤衍生油和催化裂化油浆为原料,与低阶煤进行共处理试验,考察了试验条件对共处理反应性能的影响。综合分析共处理条件对原料油转化率、油产率、气产率和沥青质产率的影响规律,得到较合适的试验条件为:催化剂添加量1%,重质油和长焰煤质量比2:1,反应温度450℃,反应压力10MPa,反应时间120min。对煤油共处理产物进行蒸馏特性分析,煤衍生油共处理产物主要集中在<230℃馏分,收率为35.14%,催化裂化油浆共处理产物主要集中在170~370℃和370~500℃馏分。 相似文献
3.
对煤焦油重质馏分油进行预加氢处理,利用红外光谱、核磁共振和元素分析等方法,从分子结构角度深入探讨煤焦油重质馏分油的理化性质和供氢性能的变化规律。结果表明,通过预加氢处理,煤焦油重质馏分油的芳碳率(fa)由加氢前的0.89下降到加氢后的0.80,芳环取代度(σ)由加氢前的0.12提高到0.20,供氢指数(PDQI)由3.21 mg/g提高到4.02 mg/g;预处理后的煤焦油重质馏分油在煤油共炼中的氢耗由4.03%下降到3.74%,转化率和油产率均得到提高,产物油中的沥青质含量明显下降,油品质量有明显改善。 相似文献
4.
通过运用色谱模拟蒸馏法分析不同汽油样品,从色谱谱图中可发现汽油样品中的重质组分的存在,确定重质组分的馏程分布,从而确定故障的部位。 相似文献
5.
聚α-烯烃是一种性能优良的润滑油基础油,其相对分子质量及分布直接影响宏观性能。本研究建立了一种用于表征1-癸烯齐聚物相对分子质量及分布的方法。采用带示差折光检测器的凝胶渗透色谱系统,综合考虑分离效果和测试可操作性,优化了流动相流速和凝胶色谱柱的组合方式。以四氢呋喃为流动相,流速为0.8 mL/min,色谱柱组合方式为Styragel HR 0.5,Styragel HR 1,PLGEL 3μm MIXED-E三柱串联,以聚苯乙烯作为标准样品,采用普适校正方法处理色谱流出曲线。此方法测得样品的质均相对分子质量与凝胶渗透色谱-光散射法所测定结果相比较,相对误差相对偏差在3%以内。 相似文献
6.
重质油宏观尺寸表征的初步研究 总被引:8,自引:1,他引:7
列举了几种表征重质油宏观尺寸的方法,阐述了特性粘度法确定重质油宏观尺寸的基本原理。利用超临界流体萃取精密分馏技术(SCFE)从沙特轻质原油的减渣中切取了14个窄馏分,实验测定了编号为双数的SCFE窄馏分的平均相对分子质量(VPO法)和特性粘度,得到的平均相对分子质量为659 ̄863的7个窄馏分的平均等效球体,分子直径为1.3 ̄1.5nm。 相似文献
7.
煤与FCC油浆共处理重质产物对道路沥青改性作用的评价 总被引:3,自引:0,他引:3
依据美国ASTMD5710—95和英国BSIBS3690对Trinidad湖沥青(TLA)的评价标准,以及中华人民共和国行业标准JTGF40—2004((公路改性沥青路面施工技术规范》对改性沥青混合料和SBS类(Ⅰ类)改性沥青储存稳定性的技术要求,对比同样试验条件下TLA改性沥青的特性,评价了煤与FCC油浆共处理所得重质产物对道路石油沥青的改性作用。结果表明,在400℃、10MPa H2压力条件下所得的重质产物(CSA)对试验用90^#基质沥青的改性作用与TLA的改性作用相似,满足上述各标准的指标要求;CSA改性沥青的混合料具有较高的极限拉伸应变值,即具有较好的弯曲性能,显示了更加优良的低温抗裂性能。 相似文献
8.
加氢处理润滑油基础油各组分对光安定性的影响 总被引:2,自引:1,他引:1
将经紫外光照前后的加氢处理润滑油基础油分离为饱和烃、轻质芳烃、中质芳烃、重质芳烃和极性组分,分别采用薄层色谱、质谱和紫外吸收光谱分析了各组分的烃组成、硫和氮含量的变化,并通过将从原料油中分离出的各组分反加到光安定性好的饱和烃中,试验验证了加氢处理润滑油基础油中的重质芳烃和极性组分是光不安定组分,其中含有硫、氮的芳香杂环化合物光安定性差。 相似文献
9.
10.
11.
Feng Yan 《Petroleum Science and Technology》2006,24(7):779-788
The changes of n-pentane asphaltene content, penetration, softening point, and ductility of two Saudi Arabian paving asphalts have been studied during aging. Further, aging kinetics of asphalt, based on the change of n-pentane asphaltene content, has been studied. Some correlative kinetic parameters were calculated and the aging kinetics equation of asphalt was gained. The value calculated depending on the equation was in accordance with the experimental data. And the relationship between the composition of the high grade paving asphalt and its aging resistant performances was revealed. It showed that the aging of high grade paving asphalt was a first-order reaction. AH-70 paving asphalt has the following characteristics: higher reaction active energy, less reaction velocity constant, lower aging velocity, and better aging resistance performance compared with AH-90 paving asphalt. The changes of penetration, softening point, and ductility of asphalt during aging further proved that the kinetic model is reliable. 相似文献
12.
《Petroleum Science and Technology》2013,31(7):779-788
Abstract The changes of n-pentane asphaltene content, penetration, softening point, and ductility of two Saudi Arabian paving asphalts have been studied during aging. Further, aging kinetics of asphalt, based on the change of n-pentane asphaltene content, has been studied. Some correlative kinetic parameters were calculated and the aging kinetics equation of asphalt was gained. The value calculated depending on the equation was in accordance with the experimental data. And the relationship between the composition of the high grade paving asphalt and its aging resistant performances was revealed. It showed that the aging of high grade paving asphalt was a first-order reaction. AH-70 paving asphalt has the following characteristics: higher reaction active energy, less reaction velocity constant, lower aging velocity, and better aging resistance performance compared with AH-90 paving asphalt. The changes of penetration, softening point, and ductility of asphalt during aging further proved that the kinetic model is reliable. 相似文献
13.
Feng Yan 《Petroleum Science and Technology》2005,23(3):273-283
In this paper, the changes of n-pentane asphaltene content, penetration, softening point, and ductility of two Panjin paving asphalts have been studied during aging. Further, based on the change of n-pentane asphaltene content, a study on aging kinetics of asphalt has been conducted. Some correlative kinetic parameters were calculated, and the aging kinetic equation of asphalt was gained. The value calculated, depending on the equation, was in accordance with the experimental data. In addition, the relationship between the composition of the high grade paving asphalt and its aging resistant performances was revealed. It showed that the aging of high grade paving asphalt was a first order reaction. Moreover, the kinetic model was proved to be reliable by investigating the changes of penetration, softening point, and ductility of asphalt during aging. 相似文献
14.
15.
简要介绍了中石化股份公司抚顺石油化工研究院近几年来在石油沥青类产品的生产和应用技术开发方面所取得的主要成果,包括高等级道路沥青、改性沥青、水工沥青、乳化沥青、彩铺胶结料及其它特种沥青等产品的开发与应用情况。在近几年的研究开发工作中.该院密切注意石油沥青技术的发展动向与市场应用情况,并结合国内外原油情况,开发了包括高等级道路沥青在内的系列沥青产品生产技术。这些沥青类产品已经应用于各类工程建设中。 相似文献
16.
17.
用SBR对呼炼的100号道路石油沥青进行了改性试验研究。100号道路石油沥青中加入适量的SBR改性剂后,沥青的质量有了明显改善,主要指标达到了日本橡胶沥青的规格要求和GB/T15180高等级道路沥青的技术要求。 相似文献
18.
19.
Ming Gao Bin Xiao Kejian Liao YuFeng Cong Yuelin Dai 《Petroleum Science and Technology》2006,24(6):689-698
In this paper, the aging processes of colored paving asphalt conforming to GB/15180-94 standard were studied by rotate thin film oven (RTFO) test. The results show that the established two dynamics models can be use to describe the aging velocity of the two kinds of colored paving asphalt perfectly. After aging, asphaltene content increased, resins and aromatics content, as well as saturate content decreased. As a result, the original colloidal structure of colored paving asphalt is destroyed, which deteriorates performance of the colored paving asphalt. During aging, the Gastel index (Ic), which is sensitive to aging conditions, decreased with increase of aging temperature and extension of aging time. Therefore, the Gastel index can be used to evaluate the aging resistance of the colored paving asphalt. 相似文献