共查询到16条相似文献,搜索用时 156 毫秒
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极少量的砷化物可使加氢催化剂发生永久性中毒,为了保护加氢催化剂长期稳定运行,必须对催化裂化汽油中的砷化物进行脱除。对研制的TAs-15型FCC汽油脱砷剂进行原料适应性、1 600 h以上稳定性试验以及工艺条件对脱砷剂性能影响评价。结果表明,TAs-15脱砷剂具有较好的原料适应性及较高的脱砷性能,在反应温度(10~50) ℃、反应压力(0.5~2.0) MPa和空速(0.5~3.0) h-1条件下,出口汽油中砷含量≤10×10-9,完全可用于催化裂化汽油中砷化物的脱除。 相似文献
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石脑油脱砷在乙烯装置上的设计及应用 总被引:1,自引:0,他引:1
通过对加氢汽油装置中催化剂中毒原因的分析,设计了乙烯装置原料石脑油脱砷反器,从而降低了原料中的砷含量,延长了催化剂的使用周期,提高了加氢汽油装置的生产负荷。 相似文献
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1前言裂解汽油馏份经加氢精制所得加氢汽油,是主要出口创汇产品之一,为进一步增强产品出口创汇能力,增加外汇收入,建立了砷含量测定方法。本文论述了加氢汽油中砷含量的测定原理、方法、步骤,并作了精密度和回收率实验,经过一年的生产实践证明了方法的可行性。2仪器和试剂2.1仪器721型分光光度计;三氢化砷发生器;微量滴定管,10ml;500ml分液漏斗。2.2试剂制备乙酸铅[pb(Ac)2·5H2O]:取10±1g分析纯的乙酸铅溶于含3ml冰乙酸的100ml水溶液中。碘化钾:将15±0.1g的分析纯碘化钾溶于100ml水中贮于棕色瓶内。贮期三天。氯化亚… 相似文献
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本文通过对碳三馏分加氢催化剂中毒原因的分析,提出采用增设碳三馏分加氢前脱砷工序的方法来降低物料中的砷含量,从而优化了加氢条件,提高了催化剂的活性,相应延长了催化剂的使用周期。 相似文献
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赵新涛 《化学工业与工程技术》2014,(1):31-34
介绍了锦西石化公司15万t/a聚丙烯装置丙烯脱砷流程,结合KTA-2型脱砷剂的实际应用过程及生产运行数据,对KTA-2型丙烯脱砷剂在炼厂丙烯精制中的工业应用进行了总结。工业应用表明:KTA-2型脱砷剂具有较好的脱砷活性,精制丙烯中含砷化合物的质量分数小于20×10-9,脱砷率达99.1%以上,满足高效催化剂对丙烯中砷含量要求;KTA-2型脱砷剂具有较高的砷容,穿透砷容(w)可达10%。 相似文献
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以甲醇制烯烃(MTO)与催化裂化(FCC)汽油降烯烃组合反应工艺为研究目标,采用分子筛催化剂,在小型固定床微型反应装置,研究MTO反应、汽油降烯烃反应以及甲醇与汽油混合炼制反应,比较了典型酸性分子筛催化剂的催化性能。结果表明,组合反应过程呈现出非稳态特征,小分子烯烃具有自催化现象,导致产物组成分布随反应时间显著变化。NH3-TPD分析表明,具有中强酸与强酸相结合分布特点的催化剂适合于反应过程的协同催化作用要求。适宜的反应条件为:以SAPO-34分子筛作催化剂,反应温度400 ℃,甲醇混炼比15%,反应时间30 min。该条件能同时较好满足MTO和FCC汽油改质要求,产物汽油中烯烃含量较FCC汽油中的含量下降50%,并可获得较高的小分子烯烃产率,实现MTO转化。 相似文献
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This article describes a novel non-hydrogenating FCC gasoline upgrading catalyst system consisting of a kaolin/γ-Al2O3 binary-matrix and an active component zeolite HZSM-5. Different catalysts made from the different combinations of HZSM-5 with the three matrices (two kaolins and γ-Al2O3) or their binary mixtures were prepared and their catalytic performances were assessed in a continuously flowing fixed-bed reactor using FCC gasoline as feedstock. The results showed that compared with the single-matrix based HZSM-5 catalysts, the binary-matrix based HZSM-5 catalysts had much better catalytic performance. The characterization results of the acidity, specific area and pore structure properties of the catalysts revealed that the synergisms between the matrices and HZSM-5 in the acidity and pore distribution of the binary-matrix based catalysts accounted for their improved catalytic performance. Our results demonstrated that the non-hydrogenating catalyst system developed in the present investigation can convert olefins in FCC gasoline into aromatics that have higher research octane number (RON) and thus has potential application for FCC gasoline upgrading because of its excellent olefin reduction ability and RON preservability. 相似文献
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To develop a novel catalyst system that has excellent olefin reduction capability for FCC gasoline without loss in octane number, different catalysts supported on multiple composite carriers consisting of SAPO-11, Hβ, HMOR and HZSM-5 were prepared and their catalytic performances for FCC gasoline upgrading were assessed in the present investigation. The pore structure and acidity of the catalysts were characterized by N2 adsorption and pyridine adsorption FTIR, respectively. Based on the results obtained over the catalysts supported on binary-zeolite carriers (Hβ/HZSM-5, HMOR/HZSM-5 and SAPO-11/HZSM-5) using FCC gasoline as the feedstock, various multiple-zeolite supported catalysts were developed from different combinations of the binary-zeolite systems. It was found that the SAPO-11/HMOR/β/ZSM-5 quadruple composite zeolite supported catalyst gave higher liquid yield, improved gasoline RON, and lower coke deposit amount for the hydro-upgrading of FCC gasoline and thus can be considered as a potential catalyst system. A comprehensive analysis based on the catalytic activities and acidity measurements revealed that acid strength and acid type were two very important factors influencing hydroisomerization and aromatization activities, and the difference in catalyst acid strength determined which factor predominates. 相似文献
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以某厂60万t/a连续重整装置为例,从原料油优化处理、采用催化剂级配装填技术以及优化注冷氢位置等方面探讨了高比例掺炼FCC汽油石脑油加氢单元的工程设计。通过采取多种优化设计,使加氢精制油中杂质含量完全满足重整进料要求,解决了炼厂重整原料不足的问题,满足了企业汽柴油产品质量升级的需求。 相似文献