• M. Dewika Sunway University, Jalan Universiti, Bandar Sunway, 47500 Petaling Jaya, Selangor, Malaysia
  • M. Rashid Air Resources Research Laboratory, Malaysia-Japan International Institute of Technology, 54100 Kuala Lumpur, Malaysia
  • N. Hasyimah Air Resources Research Laboratory, Malaysia-Japan International Institute of Technology, 54100 Kuala Lumpur, Malaysia



Air pollution, cyclone, suction, increase efficiency, pressure drop


Cyclone is one of the most commonly used particulate dust collectors in industries. It employs centrifugal force generated by a spinning gas stream to separate the particulate matter from the carrier gas. However, cyclone is efficient to collect coarse rather than fine particulate size fraction. In this regard, a study was carried out to determine the effect of creating more negative pressure at the storage hopper of a 100 mm diameter laboratory scale cyclone. The negative pressure was created by drawing out a small portion of the gas stream by means of an air pump attached to the storage hopper.  Results showed that there was exponentially related between the pressure drop (ΔP) and the amount of gas stream drawn at the storage hopper, but with an increment of 2.6% with suction compared to without. Interestingly, it was observed that more of the fine particulate matter was drawn from the gas stream as the suction flow rate increases. This is due to the suction velocity which exceeds the terminal falling velocities of the fine particles size range. There was a reduction by weight in the fine particle emitted from the cyclone ranging between 14% to 52% by introduction of the suction. The finding serves as a basis for future work in reducing fine particulates from a cyclone separator.


Avci, A., & Karagoz, I. 2003. Effects of Flow and Geometrical Parameters on the Collection Efficiency in Cyclone Separators. Journal of Aerosol Science. 34: 937-955.

Azadi, M., & Azadi, M. 2012. An Analytical Study of the Effect of Inlet Velocity on the Cyclone Performance Using Mathematical Models. Powder Technology. 217: 121-127.

Brar, L. S., Sharma, R. P., & Dwivedi, R. 2015. Effect of Vortex Finder Diameter on Flow Field and Collection Efficiency of Cyclone Separators. Particulate Science and Technology. 33(1): 34-40.

Darcovich, K., Jonasson, K. A., & Capes, C. E. 1997. Developments in the Control of Fine Particulate Air Emissions. Advanced Powder Technology. 8(3): 179-215.

Hsiao, T. C., Huang, S. H., Hsu, C. W., Chen, C. C., & Chang, P. K. 2015. Effects of the Geometric Configuration on Cyclone Performance. Journal of Aerosol Science. 86: 1-12.

Tsai, C. J., Chen, D. R., Chein, H., Chen, S. C., Roth, J. L., Hsu, Y. D., Biswas, P. 2004. Theoretical and Experimental Study of an Axial Flow Cyclone for Fine Particle Removal in Vacuum Conditions. Journal of Aerosol Science. 35(9): 1105-1118.

Winfield, D., Cross, M., Croft, N., Paddison, D., & Craig, I. 2013. Performance Comparison of a Single and Triple Tangential Inlet Gas Separation Cyclone: A CFD Study. Powder Technology. 235: 520-531.

Karagoz, I., & Avci, A. 2007. Modelling of the Pressure Drop in Tangential Inlet Cyclone Separators. Aerosol Science and Technology. 39(9): 857-865.

Chen, J., & Liu, X. 2010. Simulation of a Modified Cyclone Separator with a Novel Exhaust. Separation and Purification Technology. 73(2): 100-105.

Karagoz, I., Avci, A., Surmen, A., & Sendogan, O. 2013. Design and Performance Evaluation of a New Cyclone Separator. Journal of Aerosol Science. 59: 57-64.

Salcedo, R. L. R., Chibante, V. G., Fonseca, A. M., & Cândido, G. 2007. Fine Particle Capture in Biomass Boilers with Recirculating Gas Cyclones: Theory and Practice. Powder Technology. 172(2): 89-98.

Zhoa, B., Shen, H., & Kang, Y. 2004. Development of a Symmetrical Spiral Inlet to Improve Cyclone Separator Performance. Powder Technology. 145(1): 47-50.

Su, Y., Zheng, A., & Zhao, B. 2011. Numerical Simulation of Effect of Inlet Configuration on Square Cyclone Separator Performance. Powder Technology. 210(3): 293-303.

Cooper, C David, Alley, F. C. 1986. Air Pollution Control. PWS Engineering. Boston.

Baltrenas, P., Pranskevicius, M., & Venslovas, A. 2015. Optimization of the New Generation Multichannel Cyclone Cleaning Efficiency. Energy Procedia. 72: 188-195.

Kaya, F., Karagoz, I., & Avci, A. 2011. Effects of Surface Roughness on the Performance of Tangential Inlet Cyclone Separators. Aerosol Science and Technology. 45(8): 988-995.

Safikhani, H., Shams, M., & Dashti, S. 2011. Numerical Simulation of Square Cyclones in Small Sizes. Advanced Powder Technology. 22(3): 359-365.

Buonanno, G., Scungio, M., Stabile, L., & Tirler, W. 2012. Ultrafine Particle Emission from Incinerators: The Role of the Fabric Filter. Journal of the Air & Waste Management Association. 62(1): 103-111.

Fassani, F. L., & Goldstein, L. 2000. A Study of the Effect of High Inlet Solids Loading on a Cyclone Separator Pressure Drop and Collection Efficiency. Powder Technology. 107(1-2): 60-65.

Gimbun, J., Choong, T. S. Y., Fakhru’l-Razi, A., & Chuah, T. G. 2004. Prediction of the Effect of Dimension, Particle Density, Temperature, and Inlet Velocity on Cyclone Collection Efficiency. Jurnal Teknologi. 40: 37-50.

Hoffmann, A. C., & Stein, L. E. 2008. Gas Cyclones and Swirl Tubes: Principles, Design and Operation. Springer.

Iozia, D. L., & Leith, D. 2007. Effect of Cyclone Dimensions on Gas Flow Pattern and Collection Efficiency. Aerosol Science and Technology. 37-41.

Ganegama B. S., & Leung, A. Y. T. 2015. CFD Simulation of Cyclone Separators to Reduce Air Pollution. Powder Technology. 286: 488-506.

Hoffmann, A. C., de Jonge, R., Arends, H., & Hanrats, C. 1995. Evidence of the “Natural Vortex Length†and its Effect on the Separation Efficiency of Gas Cyclones. Filtration & Separation. 32(8): 799-804.

Leith, D., & Mehta, D. 1973. Cyclone Performance and Design. Atmospheric Environment. 7(5): 527-549.

Molerus, O., & Glückler, M. 1996. Development of a Cyclone Separator with New Design. Powder Technology. 86(1): 37-40.

Ray, M. B., Luning, P. E., Hoffmann, A. C., Plomp, A., & Beumer, M. I. L. 1998. Improving the Removal Efficiency of Industrial-Scale Cyclones for Particles Smaller Than Five Micrometre. International Journal of Mineral Processing. 53: 39-47.

William C. Hinds. 1998. Aerosol Technology. 2nd ed. Wiley Interscience.






Science and Engineering

How to Cite