Patent ID: 11906505
Assignee: CHEVRON U.S.A. INC.
Field: Measurement (Instruments)
Classification: CPC C  G  Y | IPC C  G

Claim 0:
1. A method of monitoring renewable carbon in fuel streams in a refinery, while co-processing a bio-feedstock with a fossil feedstock comprising:
a. Blending bio-feedstocks comprising pyrolysis oil from pyrolysis and triglycerides and primary bio-feedstocks;
b. Refining the blended bio-feedstocks using processes comprising (1) thermal cracking such as visbreaking and coking, (2) catalytic cracking, (3) hydrotreating, and (4) hydrocracking;
c. Measuring renewable carbon content in the refinery streams and products selected from the group consisting of the following streams: Fluid Catalytic Cracking to fuel gas and Fluid Catalytic Cracking to gasoline; Fluid Catalytic Cracking to light bottom gasoline; LCO upgrading unit to fuel gas, diesel, Jet and gasoline; jet hydrotreater to fuel gas and jet; alky unit to gasoline; bio feedstock introduction to petroleum feedstock input to diesel hydrotreater; diesel hydrotreater output to off gas, naphtha and diesel blender; diesel blender to finished diesel; cetane improver stream to diesel blender; renewable diesel 99 to diesel blender;
d. Determining the total renewable fuels produced,
e. In situ adjustment of the renewable fuels produced in step d with renewable content to attain a desired percentage of total renewable content.