# US 11,029,296 B2 · System and method for monitoring a reforming catalyst > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,296 B2 - Document ID: US11029296B2 - Status: Granted - Kind: B2 - Application number: 16/549,090 - Filed: 2019-08-23 - Published: 2019-12-12 - Granted: 2021-06-08 - Earliest claimed: 2017-11-07 - Assignees: Chevron Phillips Chemical Company LP - Applicants: Chevron Phillips Chemical Company LP - Inventors: Israel Garcia; Scott G. Morrison - Web page: https://patentgrep.com/patent/US11029296B2 ## CPC - G01N 33/0047: {Organic compounds} - C10G 69/00: Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process (C10G67/00 takes precedence) - G01N 30/00: Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography {or field flow fractionation} (G01N3/00, G01N5/00, G01N7/00, G01N9/00, G01N11/00, G01N13/00, G01N15/00, G01N17/00, G01N19/00, G01N21/00, G01N22/00, G01N23/00, G01N24/00, G01N25/00, G01N27/00, G01N29/00 take precedence) - G01N 30/88: Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 - G01N 33/005: {H2} - G01N 33/0063: {using a threshold to release an alarm or displaying means} - G01N 33/0067: {by measuring the rate of variation of the concentration} - G06T 11/26: Drawing of charts or graphs - C10G 2300/4031: Start up or shut down operations - C10G 2400/30: Aromatics - G01N 33/0068: {using a computer specifically programmed} - G01N 2030/0095: {Separation specially adapted for use outside laboratory, e.g. field sampling, portable equipments} - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract A method of monitoring catalytic performance of a catalyst used in a reforming process, comprising a) collecting gaseous component data from the reforming process; b) calculating a gaseous component ratio from the gaseous component data; and c) utilizing the gaseous component ratio to estimate an amount of catalytic activity remaining in the catalyst used in the reforming process, a number of days on stream remaining for the catalyst used in the reforming process, or both. ## Claims ### Claim 1 A method of modeling catalytic performance of a catalyst used in a reforming process, comprising: a. constructing a two-coordinate graph containing a vertical axis for gaseous component ratio data and a horizontal axis for catalyst activity factor data; b. obtaining a set of gaseous component ratio data and a set of catalyst activity factor data for the reforming process; c. representing the set of gaseous component ratio data and the set of catalyst activity factor data upon the two-coordinate graph; d. constructing a best-fit curve upon the two-coordinate graph, wherein the best-fit curve represents a graphical relationship of the set of gaseous component ratio data and the set of catalyst activity factor data; e. assigning a catalyst activity end-of-run value and representing the catalyst activity end-of-run value as a vertical line upon the two-coordinate graph; and f. determining a point of intersection of the best-fit curve with the vertical line and assigning a vertical axis value of the point of intersection as a gaseous component mole ratio end-of-run (M-EOR) value. ### Claim 2 (depends on 1) A model prepared by the method of claim 1, wherein the model is a mathematical function representing the best-fit curve. ### Claim 3 (depends on 1) The method of claim 1 wherein the gaseous component ratio data comprises a ratio of moles of hydrogen to moles of methane and wherein the gaseous component ratio data is obtained via gas chromatography. ### Claim 4 (depends on 3) The method of claim 3 wherein the best-fit curve is constructed from gaseous component ratio data and catalyst activity factor data obtained from an ongoing reforming process, an equation, or historical reforming process data. ### Claim 5 (depends on 4) The method of claim 4 wherein the graphical relationship of the best-fit curve is about linear and wherein the graphical relationship remains about linear during the reforming process. ### Claim 6 A method of modeling catalytic performance of a catalyst used in a reforming process, comprising: a. constructing a two-coordinate graph containing a vertical axis for gaseous component ratio data and a horizontal axis for days-on-stream (DOS) data; b. obtaining a set of gaseous component ratio data and a set of DOS data for the reforming process; c. representing the set of gaseous component ratio data and the set of DOS data upon the two-coordinate graph; and d. constructing a best-fit curve upon the two-coordinate graph, wherein the best-fit curve represents a graphical relationship of the set of gaseous component ratio data and the set of DOS data; e. assigning a gaseous component ratio end-of-run value and representing the gaseous component ratio end-of-run value as a horizontal line upon the two-coordinate graph; and f. determining a point of intersection of the best-fit curve with the horizontal line and assigning a horizontal axis value of the point of intersection as a DOS end-of-run (D-EOR) value. ### Claim 7 (depends on 6) A model prepared by the method of claim 6, wherein the model is a mathematical function representing the best-fit curve. ### Claim 8 (depends on 6) The method of claim 6 wherein the gaseous component ratio data comprises a ratio of moles of hydrogen to moles of methane wherein the gaseous component ratio end-of-run value comprises a mole ratio end-of-run (M-EOR) value and wherein the gaseous component ratio data is obtained via gas chromatography. ### Claim 9 (depends on 8) The method of claim 8 wherein the best-fit curve is constructed from gaseous component ratio data and DOS data obtained from an ongoing reforming process, an equation, or historical reforming process data. ### Claim 10 (depends on 9) The method of claim 9 wherein the graphical relationship of the best-fit curve is about linear and wherein the graphical relationship remains about linear during the reforming process.