Dechlorination of fuels in pyrolysis of PVC containing plastic wastes

Catalytic pyrolysis of plastic wastes with two different types of catalysts: ZSM-5 zeolite and Red Mud

“…However, it has to be mentioned that the chlorine contained in the liquids could be very detrimental for their application. For this reason, the authors have studied, in a previous work [45], different alternatives to reduce the chlorine content of the pyrolysis liquids and found out that it can be reduced to a high extent if a low temperature dehydrochlorination step is applied prior to the pyrolysis process. Table 9 shows that pyrolysis gases are composed of hydrocarbons ranging from C1 to C6, hydrogen and some carbon dioxide and monoxide.…”

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

“…Another method, the pyrolysis of the PETwaste is applied to produce a substitute of coal (carbonization) or aromatic and aliphatic compounds as an alternative for fossil fuels (indirect energy recovery). These applications are classified as energetic recycling, since they both use the released thermal energy either directly from incineration of the PETwaste or indirectly from combustion of pyrolysis products [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. For material recycling, the PET-waste is used as an additive in crushed form.…”

Chemical looping dechlorination through adsorbent-decorated Fe2O3/Al2O3 oxygen carriers

“…The addition of suppressants (calcium-based additives [15] and sulfur compounds [12]) effectively inhibits the formation of PCDD/Fs; however, the use of suppressants increases the cost. Note that these measures cannot thoroughly prohibit the emission of PCDD/Fs [15,16]. Thus, it is essential to explore effective ways to suppress the formation of PCDD/Fs based on the understanding of their formation mechanism.…”

“…In addition, HCl itself is a hazardous pollutant that is emitted from waste incinerators because of its corrosivity [6]. To our knowledge, few papers in the literature have been reported on the adsorbent effect in the CLC process, although physical and/or chemical adsorption has been widely applied in dechlorination for conventional combustion [6,15,16]. If some adsorbents can be integrated with OC to eliminate HCl in the exhaust gas, then costly equipment and energy consumption for spraying adsorbents can be avoided; avoiding such issues is the motivation of this work.…”