Two-stage coprocessing of waste plastics with coal
- Univ. of Utah, Salt Lake City, UT (United States)
Commingled post-consumer plastic waste (CP No. 2) or high density polyethylene (HDPE) was found to be thermally degraded only at temperatures higher than 430{degrees}C, while typical coal liquefaction temperatures are about 400{degrees}C. This causes difficulty for coprocessing coal with waste plastic in single stage at appropriate reaction conditions. Moreover, it is hard to find a catalyst which is effective for depolymerization of both coal and HDPE or CP No. 2. In this study, two-stage coprocessing was developed to produce liquid fuels. In the first stage, CP No. 2 or HDPE was liquefied in an 150-cm{sup 3} autoclave reactor at 435{degrees}C, 1 hr, with stirring speed of 800 rpm, under N2 or H2 with and without catalyst (HZSM-5). The resulting liquid products (yields of 78-88 wt%) were utilized as solvents for liquefaction of DECS-6 coal or Fe loaded DECS-6 coal in tubing reactors at 400{degrees}C, 1 hr, 160 rpm, {approximately}2000 psig H{sub 2}.
- OSTI ID:
- 420549
- Report Number(s):
- CONF-960807--
- Journal Information:
- Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 3 Vol. 41; ISSN ACFPAI; ISSN 0569-3772
- Country of Publication:
- United States
- Language:
- English
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