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首页> 外文期刊>Transactions of The Institution of Chemical Engineers. Process Safety and Environmental Protection, Part B >Catalytic pyrolysis of plastic waste: A review
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Catalytic pyrolysis of plastic waste: A review

机译：废塑料的催化热解研究进展

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This paper reviews the progress and challenges of the catalytic pyrolysis of plastic waste along with future perspectives in comparison to thermal pyrolysis. The factors affecting the catalytic pyrolysis process such as the temperature, retention time, feedstock composition and the use of catalyst were evaluated in detail to improve the process of catalytic pyrolysis. Pyrolysis can be carried out via thermal or catalytic routes. Thermal pyrolysis produces low quality liquid oil and requires both a high temperature and retention time. In order to overcome these issues, catalytic pyrolysis of plastic waste has emerged with the use of a catalyst. It has the potential to convert 70-80% of plastic waste into liquid oil that has similar characteristics to conventional diesel fuel; such as the high heating value (HHV) of 38-45.86 MJ/kg, a density of 0.77-0.84 g/cm(3), a viscosity of 1.74-2.5 mm(2)/s, a kinematic viscosity of 1.1-2.27 cSt, a pour point of (-9) to (-67) degrees C, a boiling point of 68-352 degrees C, and a flash point of 26.1-48 degrees C. Thus the liquid oil from catalytic pyrolysis is of higher quality and can be used in several energy-related applications such as electricity generation, transport fuel and heating source. Moreover, process by-products such as char has the potential to be used as an adsorbent material for the removal of heavy metals, pollutants and odor from wastewater and polluted air, while the produced gases have the potential to be used as energy carriers. Despite all the potential advantages of the catalytic pyrolysis, some limitations such as high parasitic energy demand, catalyst costs and less reuse of catalyst are still remaining. The recommended solutions for these challenges include exploration of cheaper catalysts, catalyst regeneration and overall process optimization. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：本文回顾了塑料废物催化热解的进展和挑战，以及与热热解相比的未来前景。详细评估了影响催化热解过程的因素，例如温度，保留时间，原料组成和催化剂的使用，以改善催化热解过程。热解可以通过热或催化途径进行。热裂解产生低质量的液体油，并且需要高温和保留时间。为了克服这些问题，通过使用催化剂已经出现了塑料废物的催化热解。它具有将70％至80％的塑料废料转化为液态油的潜力，这种废油具有与常规柴油相似的特性;例如38-45.86 MJ / kg的高热值（HHV），0.77-0.84 g / cm（3）的密度，1.74-2.5 mm（2）/ s的粘度，1.1-2.27的运动粘度cSt，倾点为（-9）到（-67）摄氏度，沸点为68-352摄氏度，闪点为26.1-48摄氏度。因此，催化热解制得的液态油品质更高可以用于多种能源相关应用，例如发电，运输燃料和热源。此外，焦炭等加工副产品有可能被用作吸附材料，以去除废水和污染的空气中的重金属，污染物和气味，而产生的气体则有可能被用作能量载体。尽管催化热解具有所有潜在的优势，但仍存在一些局限性，例如高寄生能量需求，催化剂成本和催化剂再利用较少。针对这些挑战的推荐解决方案包括探索更便宜的催化剂，催化剂再生和整体工艺优化。 （C）2016年化学工程师学会。由Elsevier B.V.发布。保留所有权利。

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