Coliquefaction of Coal and Plastics

Coliquefaction with coal [69-71] in the process of coal and waste plastics coliquefaction, the hydrogen atoms contained in plastics transfer from plastics to coal, leading to partial or even total liquefaction of coal. On the one hand, as hydrogen donors, plastics can reduce the hydrogen consumption for coal coliquefaction dramatically. On the other... 

M. M. Taghiei, Z. Feng, F. E. Hoggings, and G. P. Huffmann, Coliquefaction of waste plastics with coal, Energy Fuels, 8, 1228 (1994). 

The 1973 petroleum crisis intensified research on coal liquefaction and conversion processes. The technology developed in this field was later harnessed in chemical recycling of plastics. Mastral et al. [32], for example, employed two different batch reaction systems (tubing bomb reactors and magnetically stirred autoclave) and a continuous reactor (swept fixed bed reactor). Chemical recycling techniques such as pyrolysis [28, 33-38] or coliquefaction with coal [39, 40] convert plastic wastes into hydrocarbons that are valuable industrial raw materials. 

Chapter 6 deals with hydrogenation processes, usually based on the use of bifunctional catalysts. Plastic and rubber degradation in a hydrogen atmosphere is an effective treatment yielding highly saturated oils. Coliquefaction of plastics or rubber with coal is also considered. 

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