用高硅含磷五员环沸石分子筛(商品代号HZRP-1)作为载体,制备了Mo/HZRP-1催化剂.与Mo/HZSM-5相比,Mo/HZRP-1对甲烷无氧脱氢芳构化反应也表现出较好的催化性能.实验过程中,在反应气中添加N2作为内标物,给出包括甲烷在Mo/HZRP-1上的结焦量、转化率及各产物选择性在内的总碳物料平衡计算结果.考察了不同Mo担载量对催化剂性能和积炭行为的影响;重点考察了不同温度焙烧后20%Mo/HZRP-1催化剂的性能和积炭行为.在反应的初始阶段,6%Mo/HZRP-1表现出很高的活性:反应进行30 min时,甲烷转化率为11%,芳烃选择性达81%,而催化剂的结焦选择性仅为12%.BET,NH3-TPD和催化反应等表征结果表明:Mo物种的数量和状态,分子筛的酸强度和酸量以及分子筛的孔道结构是决定甲烷无氧脱氢芳构化反应性能和积炭行为的关键因素.
参考文献
[1] | Wang L S;Tao L X;Xie M S et al.[J].Catalysis Letters,1993,21(1/2):35. |
[2] | Xu Y D;LiuS;Wang L S et al.[J].Catalysis Letters,1995,30(1-4):135. |
[3] | Chen LY.;Xu ZS.;Li XS.;Zhang T.;Lin LW. .DEHYDRO-OLIGOMERIZATION OF METHANE TO ETHYLENE AND AROMATICS OVER MOLYBDENUM/HZSM-5 CATALYST[J].Journal of Catalysis,1995(1):190-200. |
[4] | Xu Y D;Shu Y Y;Liu ST et al.[J].Catalysis Letters,1995,35(3/4):233. |
[5] | Solymosi F;Erdohelyi A;Szoke A .[J].Catalysis Letters,1995,32(1/2):43. |
[6] | Wong S-T;Xu Y D;Wang L S et al.[J].Catalysis Letters,1996,38(1/2):39. |
[7] | Solymosi F;Szoke A;Cserenyi J .[J].Catalysis Letters,1996,39(3/4):157. |
[8] | Wong S-T;Xu Y D;Liu W et al.[J].Applied Catalysis A:General,1996,136(01):7. |
[9] | Szoke A;Solymosi F .[J].Applied Catalysis A:General,1996,142(02):361. |
[10] | Wang D J;Lunsford J H;Rosynek M P .[J].Topics in Catalysis,1996,3(3/4):289. |
[11] | Xu Y D;Liu W;Wong S-T et al.[J].Catalysis Letters,1996,40(3/4):207. |
[12] | Wang L S;Xu Y D;Wong S-T et al.[J].Applied Catalysis A:General,1997,152(02):173. |
[13] | Solymosi F.;Szoke A.;Bansagi T.;Oszko A.;Cserenyi J. .AROMATIZATION OF METHANE OVER SUPPORTED AND UNSUPPORTED MO-BASED CATALYSTS[J].Journal of Catalysis,1997(2):150-161. |
[14] | Wang DJ.;Rosynek MP.;Lunsford JH. .CHARACTERIZATION OF A MO/ZSM-5 CATALYST FOR THE CONVERSION OF METHANE TO BENZENE[J].Journal of Catalysis,1997(1):347-358. |
[15] | Shu YY.;Wong ST.;Wang LS.;Guo XX.;Xu YD. .PROMOTIONAL EFFECT OF RU ON THE DEHYDROGENATION AND AROMATIZATION OF METHANE IN THE ABSENCE OF OXYGEN OVER MO/HZSM-5 CATALYSTS[J].Journal of Catalysis,1997(1):11-19. |
[16] | Adams H;Bancroft M N;Morris M J.[J].Journal of the Chemical Society,Chemical Communications,1997(15):1445. |
[17] | Zeng JL.;Zhang HB.;Lin GD.;Tsai KR.;Xiong ZT. .Nonoxidative dehydrogenation and aromatization of methane over W/HZSM-5-based catalysts[J].Catalysis Letters,1998(1/2):119-124. |
[18] | Liu S T;Wang L S;Dong Q et al.[J].Studies in surface science and catalysis,1998,119:241. |
[19] | Shu X T;Fu W;He M Y et al.[P].US P 5232675,1993. |
[20] | Topsoe N-Y;Pedersen K;Derouane E G .[J].Journal of Catalysis,1981,70(01):41. |
[21] | Yang Y S;GuoXX;Deng MC et al.[J].Studies in Surface Science and Catalysis,1989,46:849. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%