Coliquefaction of Coal and Waste Plastic Using Boron
Trifluoride Etherate as Catalyst at Moderate Conditions

Kun Du^a*, Jianxin Zhang^b, Daoping Wang^b, Zhifang Fan^a, and Zhi Li^a

^a Department of Chemistry and Chemical Engineering, Liu Pan Shut Normal College, Liu Pan Shui, 553004, P. R. China

^b The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences,

550009, P. R. China

* e-mail: kundu408@gmail.com

Received August 24, 2012

Abstract—It is found coliquefaction of coal and low-density polyethylene (LDPE) using boron trifluoride
etherate as catalyst and adding a small quantity of sodium lignosulfonate at 380C enhance coal depolymeriza-
tion. Coal residue has been characterized by fourier transform infrared (FT-IR) to obtain confirmatory evidence.
The product analyses using ¹H-nuclear magnetic resonance (¹H-NMR), ¹³C-nuclear magnetic resonance (¹³C-
NMR) and gel permeation chromatography (GPC) techniques are also presented. ¹H-NMR and ¹³C-NMR cal-
culate results suggest that the products contain a significant amount of the desirable hexane soluble fraction.
GPC studies indicate using boron trifluoride etherate as catalyst, the weight-averaged molecular weight for the
overall liquid product is lower than obtained using ammonium molybdate as catalyst. Coal and LDPE are
almost completely converted and total conversion achieves 94.83%.

DOI: 10.3103/S0361521913060050

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