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International Journal of Chemical Engineering
Volume 2010, Article ID 681501, 16 pages
Review Article

Features of Impinging Streams Intensifying Processes and Their Applications

Key Laboratory for Green Chemical Processes of Education Ministry and Hubei Province, School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430073, China

Received 12 August 2009; Revised 8 December 2009; Accepted 27 January 2010

Academic Editor: B. Kulkarni

Copyright © 2010 Yuan Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Impinging streams (IS) are classified into gas-continuous and liquid-continuous ones (GIS and LIS). Large number of experimental data has shown GIS promotes transfer very efficiently; while it has the intrinsic faultiness of very short residence time, and its flow configuration is relatively complex, resulting in difficulty in arranging multistage process. Essentially, GIS is applicable only for rapid processes controlled by gas film diffusion. The effect of LIS enhancing transfer is negligible; while it has the features of efficient micromixing and strong pressure fluctuation both which are resulted from the intensive interaction between the opposing streams and can promote process kinetics. All the features of IS, including GIS and LIS, have great potential of application. Reviewing the results of number investigations, mostly worked by the authors, a somewhat detailed introduction to the features of IS and several cases of its successful applications, such as wet FGD, preparation of ultrafine or nano powders, successful industrial application of large scale LIS reactors and crystallizers, etc, are described.