La203对NiOHMCM-56催化剂C9^+重芳烃加氢脱烷基性能的影响.pdf

油化
2010年第39卷筼3期
PETROCHEMICAL TECHNOLOGY
GンG
研究与开发
La2O3对NiO/HMCM-56催化剂重芳烃
加氢脱烷基性能的影响
何剑洪,朱学栋,申群兵,潘志英,朱子彬,宋淼
化学工程联合国家重点实验室华东理工大学,上滸200237)
摘要]采用等体积浸渍汯制备了NiO质量分数6%、La2O3添加量不同的La2Q3-NiO/ HHMCM-56催化剂,考察了La20添加
量和艺条件対C。重芳烃加气脱烷基反应性能的影响,并采用XRD、H2ーTPR、NH2-TPD利BET等技术对催化剂的物化性质
进行了研究。实验结果表明,添加⊥a203可以提高NiO在催化剂上的分散性,收变催化剂約酸性分布与酸量,改了催化剂的加
氢脱烷基忸能;在实验范围内,随La2O、添加量的增加,加気脱烷基反应的深增加,重芳烃转化率及萃、甲萃和二屮本(统称
ETX)收率增大,但二甲萃的选择性在[a22添加量(质量分数〉为3%时达到最大。采用I-a2の添加量为3%的La2O3-NiO
HMCM-56催化剂,在.450℃、3.0MPa、重量空速3.62h'及(H2);V(Gけ)=1600的条件下,C重芳烃的转化率、BTX收率
炇BTX选择性分别为75.23%,63.36%,84.23%
关键词]氧化镧;氧化镍/HMCM-56分子筛催化剂;重芳烃;加て脱烷基
文章编号]10008144(2019)03-07249-7
中图分类号1TQ426
文献标识码]A
Effect of La, O on Performances of Nio/EMCM-56 Catalyst in
Hydrodealkylation of C Heayy Aromatics
He ianong, Zhu Xuedong, hen Qunbing, Pan Zhiying, Zhu Zibin, Song Miao
Statte Key Lahoratory of Chemical Rngineering, East China University of Science and Technology, Shanghai 200237, China)
I Abstract Several La, O -Nio/HMCM-56 catalysts with 6%(mass fraction )Nio as main active
component and different La, O, loadings were prepared by the incipient impregnation method. Effects
of La, O, loading and reaction conditions on the catalyst activity in hydrodealkylation of heav
aromatics were investigated. The catalysts were characterized by means of XRD, H2-TPR, NH2 -PD
and BET. The results showed that addition of La, O, heightened nickel species dispersity, changed
acidity distribution and acid amount of the catalysts, and improved activities of the catalysts in heav
aromatics hydrodealkylation. Both conversion of Co heavy aromatics and yield of BTX(benzene, toluene
and xylene rose with increase of La, O, loading. But selectivity to xylene was the maximum when
La, O loading was 3%. Under the conditions of La, O, - Nio/HMCM-56 with 3%o La2 O, as catalyst
460 C, 3.0 Mpa, WHSV of C heavy aromatics 3.62 h and V(H ) V(C 1 600, conversion of
Cw heavy aromatics was 75. 23, yield of BTX.36% and selectivity to BTX 84 23Y
Keywords lanthanum oxide; nickel oxide/hmcm-56 molecular sieve catalyst; C heav
aromatics; hydrodealkylation
重芳烃是指在石油和煤加工过稈中副产的液体收率高等优点,其有较强的市场竞争力。
芳烃。口前在国内,除部分重芳烃用作溶剂外,大
部分重芳烃作为燃料被烧掉2,不但浪费了宝贵的芳收屙目期:200-09-?:修改稿目期120-12-17
烃资源,而丑污染环境。重芳烃催化脱烷基技术是提
[作者简介何剑洪(1985-),男,浙江省义马市人,矽土生,电邮
高重芳烃利用率的主要手段,可以得到苯、甲苯和二
h10010306@163.c0m。联系人;朱学栋,电话021-64252386,电邮
xishuo ecust cdu cn
甲苯(究称BTK)等基本化工产品。该方法具有反应基金项目」中国石油天然气股份有限公司科学研究与技术开发项
效率高、氢耗低转化率高、选择性好、操作温度低及口(W06-04A-01-01A)