Copyrolysis of coal and waste plastics under coke-oven gas

Conference · Thu Dec 31 04:00:00 EST 1998

OSTI ID:349217

Liao, H; Li, B; Zhang, B ^[1]

---

1. Chinese Academy of Sciences, Taiyuan, Shanxi (China). State Key Lab. of Coal Conversion

A way for increasing oil and decreasing water (IODW) in copyrolysis of coal with coke-oven gas (COG) by adding waste plastics was suggested and the effects of pressure, heating rate and final temperature on the yields of char, oil and water obtained from copyrolysis of coal and waste plastics under COG were investigated in detail. Copyrolysis of Chinese Xianfeng lignite and waste plastics under COG were carried out in a 10g fixed-bed reactor under pressures of 0.1--3MPa, heating rate from 5--25 K/min and final temperatures of 723--923K. The results indicated that by adding 5% of high-density polyethylene (HDPE), the oil yield increased 4.5% (excluding the oil yield from HDPE pyrolysis) more than that of coal pyrolysis without HDPE, and water decreased about 2.2%. The yields of increased oil and decreased water accounted for 21.2% and 13% of Xianfeng lignite pyrolysis alone, respectively. With increasing pressure and final temperature, the total conversion, oil yields and water increased in varying degrees. Decreasing heating rate is beneficial to improve oil yield and reduce water. Adding waste plastics in copyrolysis of coal with COG not only improves the economic interest but also creates a way for high effective treatment of waste plastics.

• OSTI ID: 349217
• Report Number(s): CONF-980985--; ISBN 1-890977-15-2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
09 BIOMASS FUELS
CHARS
CHEMICAL REACTION YIELD
COAL GAS
COPROCESSING
HEATING RATE
LIGNITE
OILS
POLYETHYLENES
PRESSURE DEPENDENCE
PYROLYSIS
TEMPERATURE DEPENDENCE
WATER