Methods for Reducing Fouling in Tar Upgrading Processes
OwnerSundar Narayanan, Gaurav Agrawal +1inventors
InventorsSundar Narayanan, Gaurav Agrawal, Teng Xu
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Abstract
The present disclosure generally relates to methods for reducing fouling in tar upgrading processes and to apparatus for carrying out such processes. In some embodiments, a method is provided that includes providing a first tar stream, combining the first tar stream with a utility fluid to form a first process stream having a viscosity lower than that of the first tar stream, and heating the first process stream in a pre-heater under liquid phase conditions without feeding molecular hydrogen gas into the pre-heater to form a second process stream exiting the pre-heater.
Claims20
A method comprising:
- (I) providing a first tar stream;
- (II) combining the first tar stream with a utility fluid to form a first process stream having a viscosity lower than that of the first tar stream;
- and
- (III) heating the first process stream in a pre-heater under liquid phase conditions without feeding molecular hydrogen gas into the pre-heater to form a second process stream exiting the pre-heater.
A method comprising:
- (i) providing a first tar stream;
- (ii) heat soaking the first tar stream in a heat-soaking vessel to obtain a heat-soaked tar stream exiting the heat-soaking vessel;
- (iii) combining the heat-soaked tar stream with a utility fluid to form a first process stream having a viscosity lower than that of the heat-soaked tar stream;
- (iv) feeding the first process stream and optionally molecular hydrogen gas into a pre-heater;
- and
- (v) heating the first process stream in a pre-heater optionally in the presence of the molecular hydrogen gas to form a second process stream exiting the pre-heater.
Dependencies are inferred from the claim text.