Petroleum Science >2013,??Issue 1:??120-125 DOI: https://doi.org/10.1007/s12182-013-0258-5
Effect of flow field distribution on the synthesis of sub-micron ZSM-5 molecular sieve in a quasi-solid system Open?Access
文章信息
作者：Xia Zhi,Hu Si,Zhang Huan,Li Xiaofeng,Gong Yanjun and Dou Tao
作者单位：
Taiyuan University of Technology, Taiyuan Shanxi 030024, China;China University of Petroleum, Beijing 102249, China;China University of Petroleum, Beijing 102249, China;Taiyuan University of Technology, Taiyuan Shanxi 030024, China;China University of Petroleum, Beijing 102249, China;Taiyuan University of Technology, Taiyuan Shanxi 030024, China; China University of Petroleum, Beijing 102249, China
投稿时间：2012-08-16
引用方式：Xia, Z., Hu, S., Zhang, H. et al. Pet. Sci. (2013) 10: 120. https://doi.org/10.1007/s12182-013-0258-5
文章摘要
Scale-up synthesis of sub-micron ZSM-5 molecular sieve in a quasi-solid system was
investigated. Compared with traditional hydrothermal synthesis, the synthesis in a quasi-solid system has
the advantages of high yield, short crystallization time, low energy consumption as well as low emissions.
However, the high solid content in the quasi-solid system can cause the mass and heat transfer problems
and make scalable production difficult. In order to solve the problem, we have developed a method for the
optimization of the mass and heat transfer. By this method one can vary the flow field in the reactor by
changing the stirrer speed. Scale-up synthesis of the sub-micron ZSM-5 molecular sieve in a quasi-solid
system was carried out in a 5 L reactor with double propeller-type agitators. The process was investigated
with product characterization using X-ray diffraction (XRD) and scanning electron microscopy (SEM)
and the flow field information was collected using laser Doppler velocimetry (LDV). The results showed
that the flow field patterns can be tuned by using different stirrer speeds, the morphology and size of assynthesized
of ZSM-5 can be effectively controlled.
investigated. Compared with traditional hydrothermal synthesis, the synthesis in a quasi-solid system has
the advantages of high yield, short crystallization time, low energy consumption as well as low emissions.
However, the high solid content in the quasi-solid system can cause the mass and heat transfer problems
and make scalable production difficult. In order to solve the problem, we have developed a method for the
optimization of the mass and heat transfer. By this method one can vary the flow field in the reactor by
changing the stirrer speed. Scale-up synthesis of the sub-micron ZSM-5 molecular sieve in a quasi-solid
system was carried out in a 5 L reactor with double propeller-type agitators. The process was investigated
with product characterization using X-ray diffraction (XRD) and scanning electron microscopy (SEM)
and the flow field information was collected using laser Doppler velocimetry (LDV). The results showed
that the flow field patterns can be tuned by using different stirrer speeds, the morphology and size of assynthesized
of ZSM-5 can be effectively controlled.
关键词
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Quasi-solid system, sub-micron ZSM-5, scale-up, stirrer speed, flow field characteristics