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[1]王福善,杨俊明,张霖,等.偏三甲苯异构化制均三甲苯用Ag改性HZSM-5催化剂性能[J].石化技术与应用,2023,6:433-436.
 WANG Fu-shan,YANG Jun-ming,ZHANG Lin,et al.Performance of Ag modified HZSM-5 catalyst for isomerization of1,2,4-trimethylbenzene to 1,3,5-trimethylbenzene[J].Petrochemical technology & application,2023,6:433-436.
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偏三甲苯异构化制均三甲苯用Ag改性HZSM-5催化剂性能(PDF)

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

期数:
2023年6期
页码:
433-436
栏目:
出版日期:
2023-11-10

文章信息/Info

Title:
Performance of Ag modified HZSM-5 catalyst for isomerization of1,2,4-trimethylbenzene to 1,3,5-trimethylbenzene
文章编号:
1009-0045(2023)06-0433-04
作者:
王福善1杨俊明1张霖1张昊23梁琨23*
1.中国石油兰州石化公司,甘肃 兰州 730060;2.兰州大学 化学化工学院,甘肃 兰州 730000;3.有色金属催化剂国家地方联合工程实验室,甘肃 兰州 730000
Author(s):
WANG Fu-shan1YANG Jun-ming1ZHANG Lin1ZHANG Hao23LIANG Kun23
1.Lanzhou Petrochemical Company,PetroChina,Lanzhou 730060,China;2.College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China;3.National and Local Joint Engineering Laboratory of Nonferrous Metal Chemical Catalysts,Lanzhou 730000,China
关键词:
HZSM-5催化剂异构化Ag改性偏三甲苯均三甲苯转化率选择性收率
Keywords:
HZSM-5 catalystisomerizationAg modification124-trimethylbenzene135-trimethylbenzeneconversion rateselectivityyield
分类号:
TQ 426.99;TQ 241
DOI:
DOI:10.19909/j.cnki.ISSN1009-0045.2023.06.0433
文献标识码:
B
摘要:
在偏三甲苯异构化制均三甲苯反应中,以理想三甲苯混合系统为模型,通过热力学计算,得到混合三甲苯体系在不同反应温度下的平衡组成,以及偏三甲苯异构化反应温度区间内偏三甲苯转化率、均三甲苯选择性及其收率;在此基础上,对HZSM-5催化剂进行Ag金属改性,在加压固定床上评价其对偏三甲苯异构化的催化性能,并对反应温度、反应压力、质量空速等工艺条件进行优化。结果表明:在混合三甲苯的平均热力学平衡组成中,n(连三甲苯)∶n(偏三甲苯)∶n(均三甲苯)为0.052∶0.674∶0.274;在异构化反应温度区间内,偏三甲苯的转化率为32.6%,均三甲苯的选择性、收率分别为75.6%,27.4%;在反应温度280 ℃、反应压力1.6 MPa、质量空速1.0 h-1、Ag加入质量分数1%、氢油摩尔比为5的优化反应条件下,偏三甲苯的转化率为33.80%,均三甲苯的选择性为71.34%,均三甲苯单程收率最高可达24.90%。
Abstract:
Using an ideal trimethylbenzene mixture system as a model in the isomerization of 1,2,4-trimethylbenzene to 1,3,5-trimethylbenzene,the thermodynamic equilibrium composition of mixed trimethylbenzene at different temperatures and the conversion rate of 1,2,4-trimethylbenzene,the selectivity and yield of 1,3,5-trimethylbenzene within the reaction temperature range were obtained through the thermodynamic calculations. The isomerization reaction was carried out by HZSM-5 catalyst modified with Ag and its performance for the isomerization was evaluated in a pressurized fixed bed reactor. The process conditions of reaction temperature,reaction pressure,mass space velocity,and Ag addition mass fraction were optimized. The results showed that n(1,2,3-trimethylbenzene)∶n(1,2,4-trimethylbenzene)∶n(1,3,5-trimethylbenzene) was 0.052∶0.674∶0.274 in the average thermodynamic equilibrium composition of mixed trimethylbenzene. The conversion rate of 1,2,4-trimethylbenzene was 32.6%,the selectivity and yield of 1,3,5-trimethylbenzene were 75.6% and 27.4% respectively within the reaction temperature range. The conversion rate of 1,2,4-trimethylbenzene was 33.80%,and the selectivity of 1,3,5-trimethylbenzene was 71.34%,and the highest one-way yield of 1,3,5-trimethylbenzene could reach 24.90% under the optimized conditions of the reaction temperature at 280 ℃,the reaction pressure at 1.6 MPa,and the mass space velocity at 1.0 h-1,Ag addition mass fraction at 1%,and the molar ratio of hydrogen to oil at 5.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2023-11-10