Production of Xylenes from Toluene and 1,2,4Trimethylbenzene over ZSM5 and Mordenite Catalysts in a FluidizedBed Reactor
Aitani, AM; Ali, AM; Waziri, SM; Alkhattaf, S
| HERO ID | 857567 |
|---|---|
| In Press | No |
| Year | 2010 |
| Title | Production of Xylenes from Toluene and 1,2,4Trimethylbenzene over ZSM5 and Mordenite Catalysts in a FluidizedBed Reactor |
| Authors | Aitani, AM; Ali, AM; Waziri, SM; Alkhattaf, S |
| Journal | Chemical Engineering and Technology |
| Volume | 33 |
| Issue | 7 |
| Page Numbers | 1193-1202 |
| Abstract | The production of various xylenes from toluene, heavy aromatics such as 1,2,4trimethylbenzene (1,2,4TMB) and their mixture was investigated over HZSM5 (HZ), Hmordenite (HM) and a dual zeolitic catalyst comprising ZSM5 and mordenite (HZM). The experiments were conducted in a risersimulator reactor under different operating conditions to study the effect of temperature, reaction time and feed composition on conversion and product yields. At 400C, the conversion of toluene over the three catalysts yielded mainly benzene and xylenes with maximum conversion at 25% and a xylene yield of 12.5 wt% over the HM catalyst. The transformation of 1,2,4TMB doubled the conversion level and xylene yield and suppressed benzene formation. However, a considerable portion of the 1,2,4TMB feed was isomerized into 1,2,3TMB and 1,3,5TMB accompanied by the formation of tetramethylbenzenes (TeMBs). The conversion of an equimolar mixture of toluene and 1,2,4TMB over the three catalysts resulted in higher toluene conversion and double xylene yield in comparison with 1,2,4TMB alone. The advantage of using a dual zeolitic catalyst was observed at an equimolar feed of toluene and 1,2,4TMB, exhibiting maximum toluene conversion, higher xylene yield and the formation of lower levels of undesirable products. |
| Doi | 10.1002/ceat.201000083 |
| Wosid | WOS:000280349800017 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | Disproportionation; Dual catalyst; Isomerization; Mordenite; Toluene; Transalkylation; Trimethylbenzenes; Xylenes; ZSM-5 |
| Is Qa | No |