Chauhan R S, Gopinath S, Razdan P, Delattre C, Nirmala G S, Natarajan R
Energy Center, School of Mechanical and Building Sciences, Vellore Institute of Technology, Vellore - 632 014, Tamilnadu, India.
Waste Manag. 2008 Nov;28(11):2140-5. doi: 10.1016/j.wasman.2007.10.001. Epub 2007 Nov 26.
Expanded polystyrene is one of the polymers produced in large quantities due to its versatile application in different fields. This polymer is one of the most intractable components in municipal solid waste. Disposal of polymeric material by pyrolysis or catalytic cracking yields valuable hydrocarbon fuels or monomers. Literature reports different types of reactors and arrangements that have uniform temperatures during pyrolysis and catalytic cracking. The present study focuses on reducing the temperature to maximize the quantity of styrene monomer in the liquid product. A bench scale reactor has been developed to recover the styrene monomer and other valuable chemicals. Experiments were carried under partial oxidation and vacuum conditions in the temperature range of 300-500 degrees C. In the pyrolysis optimization studies, the best atmospheric condition was determined to be vacuum, the pyrolysis temperature should be 500 degrees C, yield of liquid product obtained was 91.7% and yield of styrene obtained was 85.5%. In the characterization studies, distillation and IR spectroscopy experiments were carried out. The remaining of the liquid product comprises of benzene, ethyl benzene, and styrene dimers and trimers.
发泡聚苯乙烯是因其在不同领域的广泛应用而大量生产的聚合物之一。这种聚合物是城市固体废物中最难处理的成分之一。通过热解或催化裂化处理聚合物材料可产生有价值的烃类燃料或单体。文献报道了热解和催化裂化过程中具有均匀温度的不同类型的反应器和装置。本研究的重点是降低温度以最大化液体产物中苯乙烯单体的含量。已开发出一种实验室规模的反应器来回收苯乙烯单体和其他有价值的化学品。实验在部分氧化和真空条件下于300 - 500摄氏度的温度范围内进行。在热解优化研究中，确定最佳的大气条件为真空，热解温度应为500摄氏度，所得液体产物的产率为91.7%，所得苯乙烯的产率为85.5%。在表征研究中，进行了蒸馏和红外光谱实验。液体产物的其余部分包括苯、乙苯以及苯乙烯二聚体和三聚体。
