共查询到19条相似文献,搜索用时 61 毫秒
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灵活多效催化裂化工艺技术汽油提升管反应器的操作条件对改质汽油的产品性质有重要影响。提升管中试验表明:灵活多效催化裂化工艺汽油提升管反应器在400~600℃温度、剂油比大于3.8、油气停留时间在2s左右的操作条件下,改质汽油烯烃含量降低25~45个百分点,辛烷值增加0.5~2.0个单位,脱硫率达15%~40%。 相似文献
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在XTL-5小型提升管催化裂化试验装置上,考察了操作条件对汽油烯烃度的影响。在此基础上,分别构造了两个表示烯烃含量大小和氢转移反应强弱的参数——烯烃度和氢转移指数。还探讨了反应温度和剂油比等操作条件对FCC汽油烯烃度的影响规律及机理。 相似文献
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介绍降低催化汽油烯烃含量的机理和途径,结合蜡油催化裂化装置的实际情况,从优化操作参数着手,采取降低反应温度、增加催化剂活性和拓宽汽油馏程等方法,使催化汽油烯烃的平均含量降低了6个百分点,初步达到了目的,并提出进一步改进的建议。 相似文献
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针对重催精制汽油硫醇含量超标(≯10ppm),博士试验难通过的质量问题,通过分析原料和产品中硫醇分布情况,找出现有江艺存在的不足之处,并且采取一系列改进措施,使精制后汽油质量明显改善,全部达到90^#车用汽油质量标准,其中有80%以上的精制汽油达到90^#车用汽油质量双重标准,并且,指出了要彻底解决精制汽油硫醇超标问题,还必须改进现有工艺,优化原料配给。 相似文献
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在多产柴油的生产方案下,通过调整操作参数,降低重催汽油烯烃的含量,取得了明显的效果,最低可降至39%,同时以装置的实际生产数据说明了反应温度、剂油比和催化剂活性等因素对重催化汽油烯烃含量的影响程度。 相似文献
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降低FCC汽油硫含量是降低车用成品汽油硫含量、减少汽车尾气污染的关键。FDFCC工艺采用双提升管反应器并采用和分别适宜于重油裂化和汽油改质的工艺条件 ,可使FCC汽油硫含量下降 2 0 %~4 0 % ,烯烃含量降低 2 0 %~ 30 % ,汽油诱导期和辛烷值增加 ,苯含量基本维持不变 ,是降低FCC汽油硫含量的有效措施。 相似文献
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分析了洛阳石化工程公司开发的灵活多效催化裂化 (FDFCC)工艺技术用于降低催化裂化汽油烯烃的三种工艺方案 ,三种方案均可生产烯烃体积含量低于 35 %的清洁汽油产品。改质汽油烯烃含量可降低 30个体积百分点以上 ,硫含量降低 15 %~ 2 5 %,辛烷值 (RON)提高 1~ 2个单位 ,丙烯产率也可提高 3~ 6个百分点。 相似文献
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分析了原料的烃组成、掺炼直馏柴油和减压渣油(VR)以及原料加氢预处理对FCC装置性能的影响,认为原料中的氢含量越高对生产装置越有利,掺炼直馏柴油只有在柴油过剩或者价格很低时才有利润,掺炼石蜡基VR效益较好,FCC原料加氢预处理比产品加氢精制利润高。 相似文献
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References: 《中国炼油与石油化工》2007,(4):43-47
The novel FDFCC grid packing stripper is used to raise the stripping efficiency of the equipment. This technology aims to increase the gas-solid contact area and improve the gas-solid contact efficiency. This technology has been applied in the revamped 1.05 Mt/a No. 1 FCC unit at the SINOPEC Changling Branch Company. The outcome on application of this equipment has revealed that the fluidization of the stripper was stable coupled with smooth operation. At a steam stripping load of less than 50% of the design value the spent catalyst had a lower H/C ratio, and the hydrogen content in the coke after revamp of the FCC unit decreased by 8.1% compared to the case before the equipment revamp. The spent catalyst had higher activity with the dry gas and coke yields reduced by over 0.5%, resulting in goodeconomic benefits. 相似文献
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Abstract The purpose of this study is to develop a lumped kinetic model for a typical flexible dual-riser fluid catalytic cracking (FDFCC) process, which is dissected into two reaction subsystems, and two related models are put forward, respectively. Afterward, the mathematical association is detailed and analyzed for the models. Then, one combined kinetic model for the overall process is presented. Finally, the combined model is verified with two sets of various industrial data under different operating conditions, and the results show that the model-predicted values were closely associated with the industrial data. The presented model could be instructive to optimize the operating conditions for the commercial process. 相似文献
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According to the process features and the reaction mechanism of FDFCC technology, its two reaction subsystems, one for heavy oil riser reactor, the other for gasoline riser reactor, were respectively studied. Correspondingly, a 12-lump kinetic model for heavy oil FCC and a 9-lump kinetic model for gasoline catalytic upgrading were presented. Based on this work, mathematical correlation of the lumps in the feeds and products involved in the reaction subsystems and those of the overall reaction system were analyzed in detail. Then, a combined kinetic model for FDFCC, which was based on the data recovered from a commercial unit, was put forward. The reaction performance embodied by the kinetic constants for the combined model of FDFCC was in accordance with catalytic cracking reaction mechanism. The model-calculated values were close to the data obtained in commercial scale. The model was easy to be applied in practice and could also provide some theoretical groundwork for further research on kinetic model for FDFCC. 相似文献
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在J型铺管时,焊接质量对于钢悬链线立管能否安全服役有着很大的影响。在系统研究焊接残余应力分布规律的基础上,运用整体模型和局部模型相结合的方法,研究了立管焊接残余应力对深水立管力学性能的影响。建模时使用ABAQUS软件模拟焊接过程,利用DFLUX子程序进行二次开发来编译双椭球热源模型,将焊缝及附近区域的网格进行加密细划。分析结果表明,焊接残余应力对深水钢悬链线立管焊缝中心线附近的强度影响很大,对于立管整体来说,焊接塑性区存在的范围很小,即使应力过大也不会造成承载面的全屈服而发生立管的塑性断裂;在焊接残余应力影响下,各水深立管管段所受的平均应力幅值均有所增大,疲劳损伤增加;J型铺管时建议采取一定的应力释放措施,以保证钢悬链线立管在使用年限内能够安全服役。 相似文献
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FCC汽油选择加氢脱硫催化剂的研制及其性能评价 总被引:1,自引:0,他引:1
以模拟汽油为原料油,在传统的CoMo/γ-Al_2O_3催化剂上添加Fe,K,Mg金属助剂,制备了相应的改性催化剂;研究了金属助剂种类及其负载量对催化剂物化性质及其加氢脱硫选择性的影响;并用XRD,BET,H_2-TPR等技术对催化剂的物化性质进行了表征。实验结果表明,负载0.5%(基于Fe的氧化物质量)Fe的CoMo/γ-Al_2O_3催化剂对FCC汽油具有较好的加氢脱硫选择性,并用于处理大港FCC汽油时可将汽油中的硫含量降至50μg/g以下,辛烷值只损失1~2个单位,达到了欧Ⅳ汽油标准,且Fe改性的CoMo/γ~Al_2O_3催化剂具有较好的稳定性。 相似文献