The rare earth metal-organic frameworks （Ln-MOFs） materials, Ln（BTC）（H2O）-（DMF）, were synthesized using the rare earth metal （Ln=Sm, Eu, Tb, Y） and 1,3,5-trirnesic acid （BTC） as a metal ion center and liga...The rare earth metal-organic frameworks （Ln-MOFs） materials, Ln（BTC）（H2O）-（DMF）, were synthesized using the rare earth metal （Ln=Sm, Eu, Tb, Y） and 1,3,5-trirnesic acid （BTC） as a metal ion center and ligand, respectively. X-ray diffraction （XRD） and infrared spectroscopy （FT-IR） were employed to characterize the Ln-MOFs structural features. The property of adsorption desul- furization of Ln-MOFs materials was evaluated with thiophene/n-octane as model oil. The results showed that Ln-MOFs with rare earth metals Sm, Eu, Tb and Y had perfect crystalline and good adsorption desulfurization ability. Y（BTC）（H2O）-（DMF） material had a comparatively better activity for the adsorption desulfurization with desulfurization rate up to 80.7% and the sulfur adsorption ca- pacity was found 30.7 mgS/g（Y-MOFs）. The Ln-MOFs materials had excellent reusability.展开更多
中国石化长岭分公司1.2 Mt/a S Zorb装置已连续运行40个月,对该装置长周期运行中在反应器过滤器的优化运行、提高原料换热器效率、处理再生吸附剂结块、减少临时转剂线磨损、闭锁料斗系统的维护等方面所采取的措施进行了总结分析。优化...中国石化长岭分公司1.2 Mt/a S Zorb装置已连续运行40个月,对该装置长周期运行中在反应器过滤器的优化运行、提高原料换热器效率、处理再生吸附剂结块、减少临时转剂线磨损、闭锁料斗系统的维护等方面所采取的措施进行了总结分析。优化反应器过滤器运行的关键是加强反吹系统的维护、反应压力的平稳控制、大法兰密封的保护监测和间歇性将系统内细粉排出;保持原料的清洁度、减少原料换热器结垢可提高换热效率;利用原有卸粉尘流程可减少吸附剂结块对吸附剂循环的影响;在横管下料不畅的情况下,采取少而大的弯头配管形式取代多而小的弯头配管形式,有效地减少了临时转剂线的磨损;采取一系列措施保护闭锁料斗程控阀的磨损以及缩短闭锁料斗故障处理时间,为S Zorb装置与催化裂化装置同步连续运行提供了保证。展开更多
中国石油化工股份有限公司洛阳分公司150 kt/a S Zorb装置首次开工运行后,因加工负荷及进料硫含量低,装置出现汽油脱硫率过高、产品硫含量过低、汽油辛烷值损失大的问题.经过不断探讨,摸索出吸附剂“大硫差、小循环量”的操作方法.采用...中国石油化工股份有限公司洛阳分公司150 kt/a S Zorb装置首次开工运行后,因加工负荷及进料硫含量低,装置出现汽油脱硫率过高、产品硫含量过低、汽油辛烷值损失大的问题.经过不断探讨,摸索出吸附剂“大硫差、小循环量”的操作方法.采用吸附剂低活性、高空速、降低氢油比、提高反应温度等操作条件,不仅可将汽油脱硫的辛烷值（RON）损失由0.9～1.3降至0.5个单位以下,同时也减少吸附剂细粉生成,降低剂耗,减小程控阀、膨胀节、过滤器等关键设备的磨损,延长设备运行周期,降本增效.展开更多
Zeolites NaY and Ce（IV）Y were employed as adsorbents to remove organic sulfur compounds from model gasoline （MG） solutions with and without toluene in static adsorption experiments at room temperature （RT） and a...Zeolites NaY and Ce（IV）Y were employed as adsorbents to remove organic sulfur compounds from model gasoline （MG） solutions with and without toluene in static adsorption experiments at room temperature （RT） and atmospheric pressure. The adsorbents were characterized by XRD, XRF and pyridine infrared spectrum （IR）. The adsorption experiments show that the desulfurization performance of Ce（IV）Y is much better than that of NaY. The sulfur removal over both NaY and Ce（IV）Y decreases with the increase of toluene concentration in MG, however, the decline tendency on Ce（IV）Y is smooth, and it is steep on NaY. FT-IR spectra of thiophene adsorption indicate that thiophene molecules are mainly adsorbed on NaY via π electron interaction, but on Ce（IV）Y, in addition to the π electron interaction, both Ce^4＋-S direct interaction and protonation of thiophene also play important roles. Toluene molecules are adsorbed on NaY also via π electron interaction. Although the amount of Bronsted acid sites is increased due to the introduction of Ce^4＋ ions into NaY zeolite, it is not found to influence the adsorption mode of toluene over Ce（IV）Y. Compared with NaY zeolite, the improved desulfurization performance over Ce（IV）Y for removing organic sulfur compounds from MG solution, especially those containing large amount of aromatics, may be ascribed to the direct Ce（IV）-S interaction, which is much resistant to the influence resulted from toluene adsorption.展开更多
基金supported by the National Natural Science Foundation of China(21136001,21173018)
文摘The rare earth metal-organic frameworks （Ln-MOFs） materials, Ln（BTC）（H2O）-（DMF）, were synthesized using the rare earth metal （Ln=Sm, Eu, Tb, Y） and 1,3,5-trirnesic acid （BTC） as a metal ion center and ligand, respectively. X-ray diffraction （XRD） and infrared spectroscopy （FT-IR） were employed to characterize the Ln-MOFs structural features. The property of adsorption desul- furization of Ln-MOFs materials was evaluated with thiophene/n-octane as model oil. The results showed that Ln-MOFs with rare earth metals Sm, Eu, Tb and Y had perfect crystalline and good adsorption desulfurization ability. Y（BTC）（H2O）-（DMF） material had a comparatively better activity for the adsorption desulfurization with desulfurization rate up to 80.7% and the sulfur adsorption ca- pacity was found 30.7 mgS/g（Y-MOFs）. The Ln-MOFs materials had excellent reusability.
文摘中国石化长岭分公司1.2 Mt/a S Zorb装置已连续运行40个月,对该装置长周期运行中在反应器过滤器的优化运行、提高原料换热器效率、处理再生吸附剂结块、减少临时转剂线磨损、闭锁料斗系统的维护等方面所采取的措施进行了总结分析。优化反应器过滤器运行的关键是加强反吹系统的维护、反应压力的平稳控制、大法兰密封的保护监测和间歇性将系统内细粉排出;保持原料的清洁度、减少原料换热器结垢可提高换热效率;利用原有卸粉尘流程可减少吸附剂结块对吸附剂循环的影响;在横管下料不畅的情况下,采取少而大的弯头配管形式取代多而小的弯头配管形式,有效地减少了临时转剂线的磨损;采取一系列措施保护闭锁料斗程控阀的磨损以及缩短闭锁料斗故障处理时间,为S Zorb装置与催化裂化装置同步连续运行提供了保证。
基金upported by the National Natural Science Foundation of China(20976077,21076100)National Key Basic Research Program of China(973)(2007CB216403)+1 种基金China National Petroleum Corporation(10-01A-01-01-01)Innovation Team of Liaoning Province Colleges,China~~
文摘中国石油化工股份有限公司洛阳分公司150 kt/a S Zorb装置首次开工运行后,因加工负荷及进料硫含量低,装置出现汽油脱硫率过高、产品硫含量过低、汽油辛烷值损失大的问题.经过不断探讨,摸索出吸附剂“大硫差、小循环量”的操作方法.采用吸附剂低活性、高空速、降低氢油比、提高反应温度等操作条件,不仅可将汽油脱硫的辛烷值（RON）损失由0.9～1.3降至0.5个单位以下,同时也减少吸附剂细粉生成,降低剂耗,减小程控阀、膨胀节、过滤器等关键设备的磨损,延长设备运行周期,降本增效.
基金supported by the Fundamental Research Funds for the Key Universities (Grant No. DUT10LK25)the National Natural Science Foundation of China (Grant No. 21106014)
文摘Zeolites NaY and Ce（IV）Y were employed as adsorbents to remove organic sulfur compounds from model gasoline （MG） solutions with and without toluene in static adsorption experiments at room temperature （RT） and atmospheric pressure. The adsorbents were characterized by XRD, XRF and pyridine infrared spectrum （IR）. The adsorption experiments show that the desulfurization performance of Ce（IV）Y is much better than that of NaY. The sulfur removal over both NaY and Ce（IV）Y decreases with the increase of toluene concentration in MG, however, the decline tendency on Ce（IV）Y is smooth, and it is steep on NaY. FT-IR spectra of thiophene adsorption indicate that thiophene molecules are mainly adsorbed on NaY via π electron interaction, but on Ce（IV）Y, in addition to the π electron interaction, both Ce^4＋-S direct interaction and protonation of thiophene also play important roles. Toluene molecules are adsorbed on NaY also via π electron interaction. Although the amount of Bronsted acid sites is increased due to the introduction of Ce^4＋ ions into NaY zeolite, it is not found to influence the adsorption mode of toluene over Ce（IV）Y. Compared with NaY zeolite, the improved desulfurization performance over Ce（IV）Y for removing organic sulfur compounds from MG solution, especially those containing large amount of aromatics, may be ascribed to the direct Ce（IV）-S interaction, which is much resistant to the influence resulted from toluene adsorption.
