Optimal reaction conditions for pyridine synthesis in riser reactor |
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Authors: | Shuaishuai Zhou Zelong Liu Xiao Yan Qin Di Mengxi Liu Chunxi Lu Guangzhou Jin |
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Affiliation: | 1.State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;2.Department of Chemical Engineering, Beijing Institute of Petro-Chemical Technology, Beijing 102617, China |
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Abstract: | Pyridine has been generally synthesized by aldehydes and ammonia in a turbulent fluidized-bed reactor. In this paper, a novel riser reactorwas proposed for pyridine synthesis. Experiment result showed that the yield of pyridine and 3-picoline decreased, but the selectivity of pyridine over 3-picoline increased compared to turbulent fluidized-bed reactor. Based on experimental data, a modified kinetic model was used for the determination of optimal operating condition for riser reactor. The optimal operating condition of riser reactor given by this modified modelwas as follows: The reaction temperature of 755 K, catalyst to feedstock ratio (CTFR) of 87, residence timeof 3.8 s and initial acetaldehydes concentration of 0.0029 mol·L-1 (acetaldehydes to formaldehydes ratio by mole (ATFR) of 0.65 and ammonia to aldehydes ratio by mole (ATAR) of 0.9, water contention of 63wt% (formaldehyde solution)). |
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Keywords: | Pyridine synthesis Riser reactor Optimal operating condition |
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