Petrosix
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Petrosix is currently the world’s largest surface oil shale pyrolysis reactor with 11-m diameter vertical shaft kiln, operational since 1992. It is located in Sao Mateus do Sul, Brazil, and it is owned and operated by the Brazil energy company Petrobras. Petrosix means also the Petrosix process, an externally generated hot gas technology of extracting oil from oil shale. The technology is tailored to Irati oil shale formation.
Petrobras started oil shale processing activities in 1953 by developing Petrosix technology for of extracting oil from oil shale. The pilot plant started in 1982 and the commercial production started in 1992. At present, the company operates 2 retort, the largest of which processes 260 t/h of oil shale.