馏分燃料油氧化安定性测定法应用初探

主要针对馏分燃料油氧化安定性测定法，实际操作中遇到的种种疑难问题，分别进行了分析，探讨，进一步推测，并通过对比试验加以验证，找出了影响测定馏分燃料油氧化安定总不溶物精确度的主要因素，提出了该项目测定中减小分析误差的建议。     

催化柴油氧化安定性的研究

讨论了炼油厂三套催化装置分别在汽油和柴油方案加工时催化柴油的氧化安定性,得出用不同工艺生产的催化柴油的氧化安定的差别较大,通过调整催化装置的操作条件、催化柴油的调和比例及加稳定剂的方法可有效地改变总不溶物大小,用适当的加工方法,可使催化柴油与直馏柴油直接调和,在存储三个月之内都符合新标准要求。     

柴油氧化安定性测定影响因素考察

氧化安定性是柴油的重要质量指标之一,针对实际操作中遇到的问题,考察柴油氧化安定性总不溶物测定法(SH/T0175—2004)的影响因素,提出减小误差的建议,确保测定结果准确。     

燃料清净剂对柴油氧化安定性能的影响研究

详细考察了柴油清净剂对柴油氧化安定性的影响。方差分析表明,加剂柴油实际胶质主要影响因素为柴油,氧化安定性不溶物主要影响因素为柴油,其次为柴油清净剂。加剂柴油实际胶质与空白柴油实际胶质呈线性关系。军用柴油氧化安定性好,加入清净剂对氧化安定性影响较小。轻柴油氧化安定性差,实际胶质高,氧化安定性不溶物多。清净剂对其氧化安定性性能影响很大;实际胶质变化率范围为-38．2％～16．4％;氧化安定性总不溶物均下降,下降率范围为32％～68％。通常选用能够显著降低胶质和氧化安定性不溶物的清净剂。     

加油站柴油氧化安定性影响因素的探讨

探讨了销售环节加油站柴油在运输、储存、销售、抽检等过程中,氧化安定性变化的影响因素,尤其对加油枪中铜材质的油路管线、自吸泵铜管和电磁阀等组件,对柴油氧化安定性的影响进行了较多的实验,指出掌握加油站柴油氧化安定性的变化规律及其储存、抽检中的注意事项,从而更好地科学管理、经营柴油。     

加稳定剂提高柴油氧化安定性

进行了柴油加入稳定剂，以提高其氧化安定性的试验。结果表明：加入150μg/g的适宜的稳定剂，储存28d后，柴油安定性仍能达到新的国家柴油标准要求，加稳定剂对柴油其它性质无不良影响，也不影响柴油低温流动性改进剂的作用。     

柴油储存安定性添加剂的研制及其安定性改善效果评价

利用复配优化技术研制了一种柴油储存安定性添加剂,对其理化性能指标进行分析,并考察其对柴油安定性指标的影响。结果表明:该添加剂的综合性能优于美军同类添加剂产品;可抑制富含胶质柴油的实际胶质生成,且呈现柴油安定性越差,抑制作用越明显的规律;可有效降低柴油中总不溶物含量,且总不溶物含量下降率与柴油质量衰变的严重程度成正比;对酸度、色度没有明显影响。经研究,确定将总不溶物含量作为柴油储存寿命的表征指标,预计该添加剂可使柴油储存寿命延长1.6倍以上。     

柴油氧化安定性的快速测定分析方法

柴油氧化安定性是柴油出厂分析的关键性指标,由于原有的分析方法时间过长(需要18h),导致分析时间滞后,无法起到及时监控的作用。文中阐述了快速分析柴油氧化安定性的方法,该方法可以使柴油氧化安定性分析数据快速、准确、及时地报出,保证出厂产品的质量要求。     

柴油氧化安定性快速评定方法研究

为建立一种简便、快速评定柴油氧化安定性的方法,研制了一种新型柴油氧化安定性评定仪并确定了以氧化诱导期和氧化拐点作为氧化安定性的表征量。通过单因素分析和正交试验研究了影响柴油氧化安定性的因素,确定了最佳实验条件为温度140 °C,试样量70 mL,氧压700 kPa;建立了表征量与140 °C可滤出不溶物之间的相关性模型。结果表明,氧化拐点对140 °C可滤出不溶物的预测效果良好,该方法具有良好的重复性与区分性,能够较好地评定柴油氧化安定性。     

加速氧化法精制焦化柴油的研究

采用加速氧化法对辽河炼油厂焦化柴油进行精制,考察了影响精制柴油色度的各种因素,确定最佳精制工艺条件为:氧化剂用量1.5%～2.5%,反应温度40～70℃,反应时间15～30min,沉降时间不低于30min,搅拌速度不低于600r/min,洗脱剂用量不低于1.0%.在此最佳条件下,产品收率为97.6%,各项指标均符合国家柴油质量标准.     

汽轮机油氧化安定性能的影响因素

探讨了影响汽轮机油氧化安定性能的因素，指出基础油中的芳烃、胶质、碱性氮、硫化物等对汽轮机油的氧化安定性有不良的影响。为提高汽轮机油基础油对抗氧剂的感受性，应提高精制深度，深度脱除芳烃、胶质及氮化物，降低硫化物的含量。用加氢法生产的基础油，具有非常优异的抗氧化安定性，抗氧剂、金属减活剂的复合使用能够明显改善汽轮机油的氧化安定性能。     

汽轮机油氧化安定性的影响因素

探讨了基础油对汽轮机油氧化安定性的影响,芳烃对氧化安定性有不良的影响,加氢异构的基础油有良好的抗氧化性能。抗氧剂和金属减活剂可以提高汽轮机油的氧化安定性。     

PDSC法测定汽轮机油的氧化安定性

用PDSC热分析方法研究汽轮机油的氧化性能,发现测试结果与ASTM D943《加抑制剂矿物油的氧化特性标准试验方法这》关联性好,且具有用量少、测试时间短、测试方法简单、结果重复性好的优点。     

汽轮机油氧化安定性能的影响因素及评定方法

针对影响汽轮机油氧化安定性的几个因素进行了探讨,包括基础油中烃类及非烃类化合物的影响以及抗氧剂、金属减活剂的复合使用对汽轮机油氧化安定性能的提高,介绍了国内外利用DSC或PDSC法测定汽轮机油氧化性能的情况。     

Effect of Biodiesel on Oxidation Stability, Detergency and Antiwear Ability of Diesel Oil

Different contents of biodiesel and petrodiesel were incorporated into diesel engine oils. The oxidative stability, detergency and antiwear performance of the formulated diesel oils were evaluated. The results indicated that, compared with petrodiesel, biodiesel was more liable to promote oxidation degradation of diesel oils, leading to worse oxidative stability, detergency and antiwear ability of the oils.     

汽轮机油氧化安定性测试方法研究

对6种不同类型汽轮机油进行了高温氧化试验。在实验过程中采用旋转氧弹、FTIR法、RULER以及酸值等试验方法对汽轮机油氧化过程中的氧弹保持性、抗氧剂消耗、油泥析出、酸值增加等进行了考察。分析了汽轮机油配方组成对其氧化安定性的影响,各种测试方法在分析油品氧化情况时具有的特点,提出了监测汽轮机油氧化衰减是比较科学的方法。     

An Accelerated Method for Determining Asphalt Oxidation Kinetics Parameters for Use in Pavement Oxidation and Performance Modeling

A new and innovative strategy has been developed for using the pressure aging vessel (PAV) at 90°C and 100°C and elevated pressure (2.1 MPa) for predicting asphalt oxidative embrittlement and its consequent loss of durability over years of pavement service. At elevated pressure and temperature, the method requires significantly less time, days not months, to determine atmospheric oxidation kinetics parameters than tests at 1 atm. Nevertheless, it allows fundamentals-based durability predictions specific to each material and pavement climate. One atmosphere kinetics parameters predicted from PAV data using a new correlation, together with a pavement oxidation and performance model, form the new performance prediction strategy.     

Study on Improving Oxidation Stability of Catalytically-Cracked Diesel Oil

Abstract

In this article, oxidation stabilities of catalytically-cracked diesel oil extracted with several solvents were studied respectively. The experimental results showed that double-solvent extraction was the better method than others, in which furfural containing transition metal ion was used as the first extraction solvent and the 95% ethanol solution was the second extraction solvent. During the course of accelerated storage test, the amount of sediment was reduced from 27.56 mg/100 mL to 0.43 mg/100 mL, and met the requirement of premium grade diesel oil. Under the experimental condition: shaking time of 3 min, the volume ratio of solvent to oil of one and operating temperature 30°C, the extraction result is most satisfied. The color and existent gum reached the standard of premium grade diesel oil. The removal rate of sulfur was up to 74.5%, the removal rate of nitrogen 93.8%. The cetane number of catalytically-cracked diesel oil was enhanced from 37.3 to 51.2. The oxidation stability was improved greatly after being treated.     

Study on Improving Oxidation Stability of Catalytically-Cracked Diesel Oil

In this article, oxidation stabilities of catalytically-cracked diesel oil extracted with several solvents were studied respectively. The experimental results showed that double-solvent extraction was the better method than others, in which furfural containing transition metal ion was used as the first extraction solvent and the 95% ethanol solution was the second extraction solvent. During the course of accelerated storage test, the amount of sediment was reduced from 27.56 mg/100 mL to 0.43 mg/100 mL, and met the requirement of premium grade diesel oil. Under the experimental condition: shaking time of 3 min, the volume ratio of solvent to oil of one and operating temperature 30°C, the extraction result is most satisfied. The color and existent gum reached the standard of premium grade diesel oil. The removal rate of sulfur was up to 74.5%, the removal rate of nitrogen 93.8%. The cetane number of catalytically-cracked diesel oil was enhanced from 37.3 to 51.2. The oxidation stability was improved greatly after being treated.