•   Amie Thant

  •   Chaw Su Su Hmwe


In this study, the performance of different acid treated Myanmar Natural Clay (Mabisian) was conducted the pyrolysis of mixed plastic wastes, 40% high density polyethylene, 30% polypropylene, 25% low density polyethylene and 5% polystyrene. Mabisian clay was refluxed with different concentration of nitric acid (2M, 4M, 6M, 8M, 10M, 12M and 14M)  at 100ºC for 3hrs followed by calcination at 500ºC for 1hr. The physico-chemical characteristics of resulted leached clay were studied by X-Ray Fluoresence spectroscopy (XRF), X-Ray Diffraction (XRD) and Fourier Transformed Infrared Spectroscopy (FTIR). The pyrolytic oil was characterized by Gas Chromatography – mass spectopy (GC-MS). XRF and FTIR studies indicated that acid treatment under reflux condition lead to the removal of octahedral Al3+ cations along with other impurities.  The chemical treatment increased the Si/Al ratio.  The maximum liquid yield (75%) was obtained at 12 M nitric acid, 3hr reaction time and 100 º C reaction temperatures. In addition, the percent peak area of gasoline range hydrocarbon was obtained 55.6% at optimum condition. Thus, the treated clay can be used as promising as catalyst support.

Keywords: Acid Activation, Mabisian Clay, Nitric Acid, Pyrolysis, Plastic Wastes, Physico-Chemical Character, Catalyst Support


Mohammad, N. S. and Halim, H. R. (2009). Catalytic coprocessing of waste plastics and petroleum residue into liquid fuel oils. Journal of Analytical and Applied Pyrolysis. Vol.86, pp.141-147.

Hwang, E.Y. Kim, J.R. and Chio, J. K, (2002). Performance of acid treated natural zeolites in catalytic degradation of polypropylene. Journal of Analytical and Applied Pyrolysis. Vol.62, pp. 351-64.

Rezvanipour, M, Alikhani Hesari, F. and Pazouki, M. (2014). Catalytic Pyrolysis of General Purpose Polystyrene Using Red Mud as a Catalyst. Iranian Journal of Chemical Engineering, Vol. 11, No.4, pp 10-18.

Ali, S and Uemichi, Y, (2002). Polymer waste recycling over used catalysts. Catalysis Today, Vol.75, pp. 247-255.

Lenarda, M. Storaro, L., Talona, A., Moretti, E., Riello, P., (2007). Solid acid catalysts from clays: preparation of mesoporous catalysts by chemical activation of metakaolin under acid conditions. Journal of Colloid Interface Sci. Vol. 311, pp. 537–543.

Tae, J.W., Jang, B.S., Kin, J.R. and Park, D.W., (2004). Catalytic degradation of polystyrene using acid-treated halloysite clays. Solid State Ionics, Vol.172, pp.129-133.

Syamsiro M., Cheng S. and Saptoadi H., (2014). Liquid and Gaseous fuels from Waste Plastics by Sequential Pyrolysis and Catalytic Reforming Processes over Indonesian Natural Zeolite Catalysts. Waste Technology. Vol.2, No.2, pp. 44-51.

Delhez,R, Keijser, T.H., Mittemeijer, E.J., Fresenius, Z., (1982). Determination of crystallite size and lattice distortions through X-ray diffraction line profile analysis. Analytical Chemistry. Vol.312, pp. 1–10.

Achyut P.K., Mishra, B.G., Mishra D.K., and Singh, R.K., (2010). Effect of sulphuric acid treatment on the physico-chemical characteristics of kaolin clay. Colloids and Surfaces A: Physicochem. Eng. Aspects, Vol:363, pp.98-104.


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How to Cite
Thant, A. and Hmwe, C. 2018. Study on the Catalytic Effect of Nitric Acid Activated Myanmar Natural Clay for the Degradation of Plastic Wastes. European Journal of Engineering Research and Science. 3, 8 (Aug. 2018), 56-60. DOI:https://doi.org/10.24018/ejers.2018.3.8.868.