Centre for Environmental Research, V.B. T. Institute of Technology, Bardoli, India.
Waste Manag Res. 2011 Dec;29(12):1251-61. doi: 10.1177/0734242X11406948. Epub 2011 May 31.
Three plastics, high density polyethylene (HDPE), polypropylene (PP) and polystyrene (PS), were individually co-pyrolysed with deoiled cake of jatropha (JC) at 400 and 450°C in a batch reactor in the presence of nitrogen under atmospheric pressure to produce modified liquid fractions. At higher temperature (450°C), the yield of liquid fractions by the pyrolysis of plastics (HDPE, PP and PS) alone was found to increase by 11, 12.5 and 11% for HDPE, PP and PS, respectively. Furthermore, the gaseous fraction increased by 1.3 to 2.6% while the residue generation reduced by 12.3 to 15.1%. In comparison with only plastics pyrolysis, the yield of the liquid fraction improved by 2.0 to 4.9% for their co-pyrolysis with JC. Gas chromatography-mass spectrometry analyses demonstrated that the co-processing afforded a reduction of paraffin and olefins in the liquid fractions for all of the experiments. This reduction was found to be in the order of PS > PP > HDPE. Furthermore, the proportion of oxygenates in the liquid product increased in the order of PP > HDPE > PS. Physical characteristics such as oxygenates, water contents, acid values and viscosity increased during the co-pyrolysis of plastics and JC in contrast to the liquid fractions obtained from the pyrolysis of pure plastics. Furthermore, co-pyrolysis offered a reduction in calorific values.
三种塑料，高密度聚乙烯（HDPE）、聚丙烯（PP）和聚苯乙烯（PS），分别在氮气存在下于大气压下在 400 和 450°C 的间歇式反应器中与麻疯树脱油饼（JC）共热解，以产生改性液体馏分。在较高温度（450°C）下，发现单独热解塑料（HDPE、PP 和 PS）时液体馏分的产率分别增加了 11%、12.5%和 11%。此外，气态馏分增加了 1.3%至 2.6%，而残渣生成减少了 12.3%至 15.1%。与仅塑料热解相比，这些塑料与麻疯树饼共热解时液体馏分的产率提高了 2.0%至 4.9%。气相色谱-质谱分析表明，共处理降低了所有实验中液体馏分中的石蜡和烯烃。这种减少的顺序为 PS>PP>HDPE。此外，液体产物中含氧化合物的比例按 PP>HDPE>PS 的顺序增加。与从纯塑料热解获得的液体馏分相比，在塑料和 JC 的共热解过程中，物理特性如含氧化合物、含水量、酸值和粘度增加。此外，共热解降低了热值。
