Steam Reforming of Oils Produced from Waste Plastics

Autor:	Toshiro Tsuji, Satoshi Okajima, Takao Masuda, Akira Sasaki
Rok vydání:	2005
Předmět:	Waste management Hydrogen General Chemical Engineering chemistry.chemical_element General Chemistry Polyethylene complex mixtures Catalysis Steam reforming chemistry.chemical_compound Chemical engineering chemistry Gas composition Naphtha Carbon Space velocity
Zdroj:	JOURNAL OF CHEMICAL ENGINEERING OF JAPAN. 38:859-864
ISSN:	1881-1299 0021-9592
DOI:	10.1252/jcej.38.859
Popis:	Steam reforming of oils derived from plastics has been investigated to produce gas from waste plastics. Two types of oils, from polyethylene and from polystyrene, were produced by thermal decomposition at relatively low temperatures (350-450°C). Steam reforming of these oils was conducted at temperatures from 650 to 850°C under a pressure of 1 atm using three types of Ni-Al 2 O 3 catalysts. Gas yield, gas composition, carbon conversion, and the coking ratio for these catalysts were measured. Although the plastic-derived oils contain heavy hydrocarbons or aromatics, they are gasified well with a low coking rate at temperatures above 800°C and a steam carbon ratio = 3.5 and LHSV = 1 h -1 . Among the three catalysts, C11NK, which is a commercial steam reforming catalyst for naphtha, possessed moderate activity, but had the lowest rate of coking. Gas compositions agreed well with values calculated from chemical equilibria. Product gas contained approximately 72 vol% hydrogen for polyethylene-derived oil and 68 vol% for polystyrene-derived oil.
Databáze:	OpenAIRE
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