Stabilization And Hydrogenation Methods For Microbial-Derived Olefins
Processes and systems for stabilization and subsequent hydrogenation of an immiscible olefin are described. In certain embodiments, the hydrogenation is conducted in a fixed bed reactor in presence of a hydrogenation catalyst.
1 . A method for hydrogenation of an immiscible olefin and hydroprocessing comprising:
a) providing a feed stream to the inlet of a fixed bed reactor wherein the feed stream comprises the immiscible olefin and a diluent composition; and
b) contacting the feed stream with hydrogen in the presence of a hydrogenation catalyst at a temperature of about 20° C. or greater thereby producing an effluent,
wherein the diluent composition is an unfinished diesel that has a sulfur content greater than 50 ppmw and the effluent comprises saturated immiscible olefin and the effluent has a sulfur content that is less than 50 ppmw.
2 . The method of claim 1 , wherein the unfinished diesel has a sulfur content that is greater than 100 ppmw.
3 . The method of claim 1 , wherein the unfinished diesel has a sulfur content that is greater than 1000 ppmw.
4 . The method of claim 1 , wherein the unfinished diesel has a sulfur content that is greater than 5000 ppmw.
5 . The method of claim 1 , wherein the temperature is between 110° C. and 400° C.
6 . A method for hydrogenation of an immiscible olefin and hydroprocessing comprising:
a) providing a feed stream to the inlet of a fixed bed reactor wherein the feed stream comprises the immiscible olefin and a diluent composition wherein the diluent composition comprises unfinished diesel that has a sulfur content that is greater than 50 ppmw such that the feed stream has a sulfur content that is greater than 50 ppmw;
b) contacting the feed stream with hydrogen in the presence of a hydrogenation catalyst at a temperature of about 20° C. or greater thereby producing an effluent wherein the effluent comprises saturated immiscible olefin and the effluent has a sulfur content that is less than 50 ppmw;
c) diverting part of the effluent stream into a recycle stream comprising a finished diesel that has a sulfur content that is less than 50 ppmw;
d) adding the recycle stream as part of the diluent composition to a stream comprising the immiscible olefin to form a feed stream comprising immiscible olefin and the feed stream has a sulfur content that is greater than 50 ppmw;
e) providing the feed stream to the inlet of the fixed bed reactor; and
f) repeating steps b)-e) at least once.
7 . The method of claim 6 , wherein the hydrogenation reaction occurs at a temperature that is greater than about 100° C.
8 . The method of claim 6 , wherein the unfinished diesel has a sulfur content that is greater than 100 ppmw.
9 . The method of claim 6 , wherein the unfinished diesel has a sulfur content that is greater than 1000 ppmw.
10 . The method of claim 6 , wherein the unfinished diesel has a sulfur content that is greater than 5000 ppmw.
11 . The method of claim 6 , wherein the temperature is between 110° C. and 400° C.
12 . The method of claim 6 , wherein the feed stream comprises 10 wt. % or less of the immiscible olefin.
13 . The method of claim 6 , wherein the feed stream comprises 25 wt. % or less of the immiscible olefin.
14 . The method of claim 6 , wherein the feed stream comprises 50 wt. % or less of the immiscible olefin.