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Secondary co‐refining of petroleum and coal distillates
Author(s) -
Dohms K.,
Langhoff J.,
Löring R.,
Strobel B.,
Jones M. A.,
Kimber G. M.,
Moore S. A.
Publication year - 1994
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440180232
Subject(s) - naphtha , hydrodesulfurization , coal , distillation , fuel oil , diesel fuel , coal liquefaction , petroleum , waste management , petrochemical , pulp and paper industry , refining (metallurgy) , chemistry , organic chemistry , catalysis , engineering
Straight‐run distillates derived from North Sea (Brent) crude oil and coal‐derived distillate obtained from the 200 t/day coal liquefaction pilot plant at Bottrop, Germany, have been used to prepare light and middle distillate feedstocks. Light distillates have been hydrotreated yielding raffinates, which meet the reformer feed specifications. Hydrotreating of middle distillates including blends has been studied in order to achieve heteroatoms reduction to hydrocracker feed specification. Process conditions were found to be in accordance with the low‐severity conditions conventionally applied in the petroleum industry. Hydrotreating blends with elevated coal‐oil concentrations caused severer process conditions to be established. The hydrotreated middle distillate blends have been hydrocracked with and without middle‐distillate recycling thus mainly yielding naphtha reformer feedstock and diesel fuel, respectively. Samples of petroleum straight‐run naphtha and of hydrotreated coal oil naphtha have been fractionated. The heavy naphtha fractions have been catalytically reformed, both individually and as blends. The coal‐derived naphtha could be reformed to a high‐octane blendstock at markedly less severe conditions than those necessary for the petroleum naphtha. As a result, reforming the blends improved liquid yields in comparison with the alternative of reforming the two feeds separately and blending the products.