| 학회 |
한국화학공학회 |
| 학술대회 |
2009년 봄 (04/23 ~ 04/24, 광주 김대중컨벤션센터) |
| 권호 |
15권 1호, p.745 |
| 발표분야 |
유동층 |
| 제목 |
Hydrodynamics and gas residence time distributionin a circulating fluidized bed |
| 초록 |
The Advanced Catalytic Olefins (ACO) process produces more propylene than conventional naphtha cracking using a circulating fluidized bed (CFB) reactor. Therefore, it is necessary to find the optimum reaction conditions for maximum selectivity of the reaction by measuringgas residence time distribution (RTD). In this study, the effects of gas velocity (2.0-5.0 m/s) and solid circulation rate (0.0-150.0 kg/m2s) on the gas RTD characteristics were determined in a cold model CFB reactor (0.05 m-i.d. × 6.4 m-high) of ACO catalyst (dp = 71 μm, ρs = 1969 kg/m3). The tracer gas (He) was introduced as a pulse injection into a injection nozzle using a solenoid valve. Concentration-time response were recorded to determine the average residence time and to determine Peclet numbers from which the axial dispersion coefficient was determined in the system. The axial dispersion coefficient exhibits a minimum value at the boundary between the fast fluidization and pneumatic conveying flow regimes. |
| 저자 |
김국희1, 우상훈1, 김상돈1, 김지민2, 김석준2, 박덕수2
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| 소속 |
1한국과학기술원, 2SK에너지 |
| 키워드 |
gas RTD; CFB; ACO process
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| E-Mail |
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| 원문파일 |
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