Iran Polymer and Petrochemical Institute Polyolefins Journal 2322-2212 2 1 2015 01 01 Estimation of pyrolysis product of LDPE degradation using different process parameters in a stirred reactor 39 47 1102 10.22063/poj.2015.1102 EN Mehrdad Seifali Abbas-Abadi Chemical Engineering, Energy Department, Kermanshah University of Technology, P.O. Box 67178-3766, Kermanshah, Iran Polymerization Engineering, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, Iran Mehdi Nekoomanesh Haghighi Polymerization Engineering, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, Iran Armando G. McDonald Department of Forest, Rangeland and Fire Sciences, University of Idaho, PO Box 441132, Moscow, ID 83844-1132, USA Hamid Yeganeh Polymerization Engineering, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, Iran Journal Article 2014 10 15 Pyrolysis of low density polyethylene (LDPE) by equilibrium fluid catalytic cracking (FCC) was studied in a stirred reactor under different process parameters. In this work, the effect of process parameters such as degradation temperature (420-510°C), catalyst/polymer ratio (0-60%), carrier gas type (H2, N2, ethylene, propylene, Ar and He), residence time and agitator speed (0-300 rpm) on the condensate yield (liquid, gas and coke) and product composition were considered. Reaction products were determined by GC analysis and shown to contain naphthenes (cycloalkanes), paraffins (alkanes), olefins (alkenes) and aromatics. Higher temperature and more catalyst amount enhanced LDPE cracking. The maximum “fuel like” condensed product yield was attained at 450°C and 10% catalyst, respectively and gaseous products increased with increases in temperature. Hydrogen as a reactive carrier gas increased the condensed and paraffinic product yield. Appropriate heat transfer (by stirring) increased the catalyst efficiency in a stirred reactor. http://poj.ippi.ac.ir/article_1102_1e2b6565bb9019394cb665fbf6453049.pdf