Thermal cracking of petroleum heavy oil under hydrogen generated in situ from methanol decomposition
✍ Scribed by Koji Ouchi; Yoshihide Ozaki; Atsushi Daigo; Hironori Itoh; Masataka Makabe
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 371 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0016-2361
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✦ Synopsis
Khafji vacuum residue was thermally cracked using (1) ZnO<r,O, plus stabilized Co and (2) CuO-ZnO-Al,O, as catalyst under hydrogen formed in situ from methanol decomposition. Catalyst (2) was more effective in conversion than catalyst (1). Conversion increased with temperature and time, but the gas yield also increased. For catalyst (1) the yield of oil of b.p. < 325°C was a maximum at 500°C or 120min, whereas that of the fraction of b.p. 325-500°C had a maximum at 440°C or 30min. Benzene-insolubles also increased up to 12 wt 'A. For catalyst (2) the trends were similar but the gas yield was significantly higher. Conversion to oil was a maximum at z 44C~48o"C. The yield of oil of b.p. ~325°C increased with temperature or time, whereas that of the fraction of b.p. 325-500°C decreased. This method gives slightly less oil yield than hydrocracking in a hydrogen atmosphere but is much superior to simple thermal cracking.