| 학회 |
한국화학공학회 |
| 학술대회 |
2012년 가을 (10/24 ~ 10/26, 부산 BEXCO) |
| 권호 |
18권 2호, p.2480 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Para-Xylene Synthesis by an In-situ Methylation of Toluene with Syngas over Bifunctional Catalysts |
| 초록 |
Para-Xylene is an important raw material in the petrochemical industry for terephthalate and polyester. The direct conversion of toluene with syngas (CO + H2) over bifunctional catalysts for the selective formation of para-xylene is a challenging process. In this study, we investigated an in-situ methylation of toluene with syngas over bifunctional mixtures of modified HZSM-5 and methanol synthesis catalysts in comparison to the conventional MeOH/Tol methylation process. The in-situ methylation was studied in a fixed bed downflow reactor in the temperature range of 400-500℃ under the total pressure of 460 psig. The in-situ methylation exhibited many catalytic synergies in terms of xylene yield as well as CO and toluene conversion over monofunctional counter parts and MeOH/Tol methylation process. The effects of ratio of catalytic functions and modification of HZSM-5 on the total xylene yield and para-selectivity in the in-situ methylation were studied in detail. Catalysts were characterized by using X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) with EDS, HRTEM, temperature programmed desorption of ammonia and DTBPy (di-tert-butyl pyridine), etc. The reaction products were analyzed by using GC with a thermal conductivity detector (TCD, gas product) and a flame ionization detector (FID, liquid product). |
| 저자 |
김동욱1, 이슬아1, 이정규1, 이창규2, 김태진2
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| 소속 |
1동아대, 2SK 이노베이션 |
| 키워드 |
para xylene; toluene alkylation; syngas; methanol synthesis; silicalite-1/HZSM-5; in-situ alkylation; xylenes; HZSM-5
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| E-Mail |
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| 원문파일 |
초록 보기 |
