|本期目录/Table of Contents|

[1]杨得恒,唐玉龙,谢鑫.钒对USY型分子筛的影响及氧化镧在钒捕集中的作用[J].石化技术与应用,2023,2:79-82.
 YANG De-heng,TANG Yu-long,XIE Xin.Effect of vanadium on USY zeolite and lanthanum oxide on vanadium trapping[J].Petrochemical technology & application,2023,2:79-82.
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钒对USY型分子筛的影响及氧化镧在钒捕集中的作用(PDF)

《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]

期数:
2023年2期
页码:
79-82
栏目:
出版日期:
2023-03-10

文章信息/Info

Title:
Effect of vanadium on USY zeolite and lanthanum oxide on vanadium trapping
文章编号:
1009-0045(2023)02-0079-04
作者:
杨得恒1唐玉龙1谢鑫2
(1.中国石油兰州石化公司 催化剂厂,甘肃 兰州 730060;2.中国石油石油化工研究院 兰州化工研究中心,甘肃 兰州 730060)
Author(s):
YANG De-heng1 TANG Yu-long1 XIE Xin2
(1. Catalyst Plant, Lanzhou Petrochemical Company, PetroChina, Lanzhou 730060, China; 2. Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China)
关键词:
催化裂化催化剂USY型分子筛重金属污染稀土氧化物氧化镧
Keywords:
fluid catalytic cracking catalyst USY zeolite heavy metal pollution rare earth oxide lanthanum oxide
分类号:
TQ 426.95
DOI:
DOI:10.19909/j.cnki.ISSN1009-0045.2023.02.0079
文献标识码:
B
摘要:
模拟催化裂化高温水热再生环境,采用X射线衍射、N2物理吸附、高分辨电子透射显微镜与NH3-程序升温热脱附等方法,研究了重金属元素钒(V)对催化剂活性组分水热超稳Y型分子筛(USY型分子筛)的破坏行为;在此基础上,研究了稀土氧化物氧化镧(La2O3)对重金属V的捕集作用。结果表明:当分子筛负载较高质量分数的V时,分子筛的晶体结构遭到严重破坏;与未负载V的催化剂相比,负载质量分数为0.5%的催化剂,转化率降低了16.3个百分点,目标产物(液化气和汽油)收率显著降低,副产物干气、焦炭收率大幅增加;向模型催化剂中添加La2O3可以提高催化剂的重金属V捕集能力,在V负载质量分数为0.6%的情况下,含有La2O3的模型催化剂的原料油转化率和目标产物收率大幅增加。
Abstract:
The destruction behavior of heavy metal vanadium (V) on the active component of the catalyst—hydrothermal superstable Y zeolite (USY zeolite) was studied by X-ray diffraction, N2 physical adsorption, high resolution electron transmission microscope and NH3-programmed heating desorption, in the simulated high-temperature hydrothermal regeneration environment of fluid catalytic cracking. On this basis, the trapping effect of lanthanum oxide (La2O3) on heavy metal V was studied. The results showed that the crystal structure of zeolite was seriously damaged when the zeolite was loaded with higher content of V. The conversion rate of the catalyst with mass fraction of 0.5% V loading decreased by 16.3 percentage points; the yield of target product (LPG and gasoline)decreased significantly; the yield of by-products dry gas and coke increased significantly, compared with the catalyst without V loading. The addition of La2O3 to the model catalyst could significantly improve the heavy metal V capture capacity of the catalyst. The conversion rate of feed oil and the yield of target products of the model catalyst containing La2O3 increased significantly, when the mass fraction of V was 0.6%.

参考文献/References

[1] Wormsbecher R F, Peters A W, Maselli J M. Vanadium poisoning of cracking catalysts: Mechanism of poisoning and design of vanadium tolerant catalyst system[J]. Journal of Catalysis, 1986, 100(1): 130-137.[2] Xu M, Liu X, Madon R J. Pathways for Y zeolite destruction: The role of sodium and vanadium[J]. Journal of Catalysis, 2002, 207(2): 237-246.[3] Pine L A. Vanadium-catalyzed destruction of USY zeolites[J]. Journal of Catalysis, 1990, 125(2): 514-524.[4] Du X H, Zhang H T, Cao G Z, et al. Effects of La2O3, CeO2 and LaPO4 introduction on vanadium tolerance of USY zeolites[J]. Microporous and Mesoporous Materials, 2015, 206: 17-22.[5] 段宏昌, 苏怡, 杨得恒, 等. 催化裂化装置掺炼常三线柴油的研究及工业应用[J]. 石化技术与应用,2021,39(4):289-292.[6] 刘倩倩, 达志坚, 吕令玮, 等. 催化裂化催化剂铁中毒问题剖析[J]. 石油炼制与化工, 2022,53(5):1-6.

备注/Memo

备注/Memo:
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更新日期/Last Update: 2023-03-10