共查询到19条相似文献,搜索用时 31 毫秒
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In the past several decades,SINOPEC has devoted continuously great efforts to the development of DCC technology,the only commercial process using heavy feeds aiming at propylene production.Recently,a series of research breakthroughs have been achieved in molecular refining.Based on the detailed analysis on the complex DCC reaction network,an innovative catalyst technology has been developed to Optimize Catalysis Kinetics (OCK in brief).The deep-cracking process can be improved with optimizing the availability of the active sites.The updated MFI and beta zeolites are used to boost the propylene selectivity.The latest generation catalyst DMMC-1 has been applied commercially.Compared with the best historical records in the past,the propylene yield upon application of the catalyst DMMC-1 increases by 2.4 m% coupled with an improved distribution of products.The DCC technology continues to assume a leading position for manufacturing propylene from heavy feedstocks. 相似文献
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以高活性高稳定性的高稀土含量超稳改性分子筛为活性组元开发了新型重油催化裂化催化剂HSC-1,并利用XRF、BET、孔体积、磨损指数、粒度测定等对其化学组成及物化性能进行了分析,利用轻油微反及ACE对催化裂化性能进行了考察。结果表明,制备的催化剂HSC-1具有物化性能好、重油裂化能力及抗金属污染能力强、产物分布好、焦炭选择性及汽油选择性好,以及优异的降低汽油烯烃含量的特性。 相似文献
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催化裂化烟机结垢成因分析及对策 总被引:1,自引:0,他引:1
侯典国 《中国炼油与石油化工》2011,13(2):65-74
Causes of scale deposition in flue gas turbine expander of FCCU were analyzed based on some aspects,including the types and operating conditions of flue gas turbines,properties and composition of feedstocks and catalysts,and operating conditions of the reactor and regenerator.Some countermeasures were proposed for preventing scale deposition in flue gas turbine of FCCU. 相似文献
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Single-event microkinetic(SEMK) model of the catalytic cracking of methylcyclohexane admixed with 1-octene over REUSY zeolites at 693 K—753 K in the absence of coke formation is enhanced. To keep consistency with the wellknown carbenium ion chemistry, hydride transfer forming and consuming allylic carbenium ions in the aromatization of cycloparaffins are further investigated and differentiated. The reversibility of endocyclic β-scission and cyclization reactions is refined by accounting explicitly for the reacting olefins and resulting cycloparaffins in the corresponding thermodynamics. 24 activation energies for the reactions involved in the cracking of cycloparaffins are obtained by the regression of 15 sets of experimental data upon taking the resulting 37 main cracking products, i. e., responses into account. The enhanced SEMK model can adequately describe the catalytic behavior of 37 main products with conversion and temperature. 相似文献
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Effects of metal oxide in ZSM-5 zeolite on its catalytic performance in fluid catalytic cracking reaction were studied via characterization by XRD and FT-IR spectroscopy using pyridine and collidine as molecular probes,and the modified ZSM-5 zeolite was evaluated in a micro reactor using standard light diesel fraction as the feedstock.Test results indicate that the metal species introduced into the ZSM-5 zeolite had led to the formation of Lewis acid centers.When the modified ZSM-5 zeolite with the metal species on its surface was used as the catalyst in FCC reaction,both the propylene yield and the propylene concentration in the liquefied petroleum gas increased,but in the meantime,more hydrogen and coke were formed at high conversion rate under the joint action of nonselective cracking of Lewis acid centers and dehydrogenation at metal centers on its outside surface. 相似文献
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张志民 《中国炼油与石油化工》2017,19(1):11-18
介绍了新型重油催化裂化催化剂HSC在A炼厂140万吨/年重油催化装置上的工业标定试验及工业应用情况。工业标定试验结果表明: 与基础剂相比,干气产率和油浆产率下降, 总液收增加了1.34个百分点,汽油产率增加了5.05个百分点,液化气产率增加了1.43个百分点。产品性质没有明显变化,催化剂抗磨损强度较高。通过中间标定、总结标定及后续的长期工业应用日常统计数据结果表明催化剂HSC具有较强的重油转化能力、较高的汽油产率、较好的产物分布和产品选择性。 相似文献
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重油催化裂化催化剂RCH的开发与工业应用 总被引:2,自引:0,他引:2
RCH催化剂是继我国第一代超稳Y型催化裂化催化剂之后,开发研制的新型渣油裂化催化剂。该剂沸石含量低,而在裂化性能、产品收率、焦炭选择性等方面均与国内外同类型催化剂相当,可替代进口催化剂在重油催化裂化(RFCC)装置上使用;该剂更具有平衡活性和轻质油收率高、稳定性好、裂化重质油能力和抗重金属污染能力强等特点,同时制备工艺先进,流程简单,属国际先进水平。 相似文献
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催化裂化进料喷嘴对重油加工尤为重要。LPC—2型喷嘴是为重油加工,特别是为劣质渣油加工开发的新型进料喷嘴。其外型结构与LPC—1型相同,故可兼容。但预混合室、混合室和喷头的内部结构作了不少改进。与LPC—1型相比,在原料油性质、操作条件、催化剂性质大体相同的情况下,生焦率降低、轻油收率提高、产品分布改善、用汽量小,提高了经济效益。喷嘴属低压降喷嘴,有较大操作弹性。文中提出了喷嘴安装和操作的技术要求。 相似文献
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催化裂化进料喷嘴对重油加工尤为重要。LPC-2型喷嘴是为重油加工,特别是为劣质渣油加工开发的新型进料喷嘴,其外型结构与LPC-1型相同,故可兼容。但预混合室,混合室和喷头的内部结构作了少少改进。与LPC-1型相比,在原料油性质,操作条件,催化剂性质大作相同的情况下策焦率降低,轻油收率提高,产品分布改善2,用汽量小,提高了经济效益。 相似文献
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通过改变分子筛阳离子交换及气相超稳改性的程度工业生产出不同晶胞大小的系列高稳定性分子筛HSZ。为了考察这些分子筛的催化裂化反应性能,分别以所开发的HSZ-3,HSZ-4,HSZ-5分子筛为活性组元中试制备了催化裂化催化剂,并通过固定床自动微反活性评定仪和ACE固定流化床微反装置对其催化裂化反应性能进行了考察比较。结果表明,与以水热法分子筛为活性组元的催化剂相比,以气相法工业制备的高稳定性分子筛为活性组元的催化剂具有较强的重油裂化能力,较高的汽油、轻质油及总液体收率,较好的焦炭选择性。 相似文献
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In order to improve the capability of the RFCC unit for heavy oil conversion, reduce the yields of coke and oil slurry, and increase the economic benefits of the unit, starting August 2007 the SINOPEC Luoyang Branch Company began to apply in its No. 2 RFCC unit the Endurance catalyst featuring strong heavy oil conversion ability, low yields of coke and oil slurry, and high total light liquid yield. The results on calibration of the Endurance catalyst conducted in November 2007 indicated that under the circumstances of using deteriorating feedstock quality and lower unit consumption of catalyst, the yields of coke, oil slurry and gas decreased by 0.28 %, 1.24 % and 0.35 %, respectively. The light distillate yield and total light liquid yield increased by 0.8 % and 1.88%, respectively. 相似文献
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国内外重油催化裂化装置的原料特点和操作理念浅析 总被引:1,自引:0,他引:1
在分析了国内外重油催化裂化装置原料油特点的基础上,以提高经济效益为中心,分析比较了国内外在催化剂使用和操作理念方面的差异。国外重油催化裂化装置加工的原料一般经过加氢预处理,采用高苛刻度单程操作,较大的催化剂单耗以得到较高的平衡催化剂活性,追求最大的处理量和整体经济效益;国内重油催化裂化装置的原料多未经加氢预处理,采用较低苛刻度的回炼操作模式,催化剂单耗较小,平衡催化剂上重金属含量较高,活性较低,总轻液收较高。指出考核应以最大经济效益为目标,而不只考虑催化剂单耗等单项指标。 相似文献
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LANET—35重油催化裂化催化剂的工业应用 总被引:3,自引:0,他引:3
LANET-35新型重油催化剂,经大连石化公司1.40Mt/a催化裂化装置半年多的工业应用,表明该催化剂的筛分组成分布合理,堆积密度适中,在装置中流化正常。原料掺大庆减压渣油可由52%提高到60%,表现出较强的重油转化能力和抗重金属污染的能力,对焦炭的选择性好,可直接生产90号汽油。 相似文献
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Endurance催化剂在重油催化裂化装置的应用 总被引:1,自引:0,他引:1
为了提高重油催化裂化过程的重油转化能力,降低焦炭和油浆产率,增加装置效益,中国石化洛阳分公司Ⅱ套催化裂化装置于2007年8月开始使用的Endurance重油深度转化催化剂,该催化剂具有重油转化能力强、焦炭和油浆产率低、总轻质液体收率高的特点。2007年11月的标定结果表明,在原料油性质变差、催化剂单耗降低的情况下,焦炭产率、油浆产率、干气产率比参比剂(基础数据)分别降低0.28个百分点、1.24个百分点、0.35个百分点;轻质油收率、总轻质液体收率比基础数据分别提高0.8个百分点和1.88个百分点。 相似文献
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抗重金属污染的FCC催化剂基质 总被引:4,自引:0,他引:4
为解决原料油中镍和钒对FCC催化剂的污染,研制了用磷改性的活性氧化铝和一种金属复合氧化物ABO3,将它们按一定比例加到流化催化裂化(FCC)催化剂基质中,对其改性。试验结果表明,可以显著提高FCC催化剂的抗重金属污染能力,与未加改性剂的原基质催化剂相比较,在催化剂中镍含量为3000μg/g、钒含量为5000μg/g的条件下,微反活性指数可增加4~5个单位,比积炭量可降低30%~40%。 相似文献