Process for treating offgas from hydrotreating of renewable feedstocks
OwnerAndries Hendrik Jansseninventor
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Abstract
A method for treating an offgas produced in the processing of a renewable feedstock, includes hydrotreating a renewable feedstock to produce an effluent having a hydrotreated liquid and a vapour phase. The effluent vapour phase contains hydrogen, carbon dioxide, hydrogen sulphide and carbon monoxide. The effluent is separated into a liquid stream and an offgas streams. The offgas stream, containing carbon dioxide and hydrogen sulphide is directed to abiological desulfurization unit where a majority of the hydrogen sulphide is converted to elemental sulphur and a CO2-rich gas stream is produced.
Claims12
A method for treating an offgas produced in the processing of a renewable feedstock, comprising the steps of:
- hydrotreating a renewable feedstock to produce an effluent comprising a hydrotreated liquid and a vapour phase comprising hydrogen, carbon dioxide, hydrogen sulphide and carbon monoxide;
- separating the effluent into one or more liquid streams and one or more offgas streams, wherein at least one of the offgas streams comprises carbon dioxide and hydrogen sulphide;
- directing the at least one of the one or more offgas streams to a biological desulfurization unit;
- and
- converting a majority of the hydrogen sulphide in the biological desulfurization unit to elemental sulphur and producing a CO2-rich gas stream.
Dependencies are inferred from the claim text.