公开(公告)号：US11874230B2

公开(公告)日：2024-01-16

申请号：US17806134

申请日：2022-06-09

Applicant: Endress+Hauser Optical Analysis, Inc.

Inventor： Joseph B. Slater ,  Marc Winter ,  Oliver Link

IPC: G01N21/65 ,  G01N9/24 ,  G01N33/00

CPC classification number: G01N21/65 ,  G01N9/24 ,  G01N33/0027

Abstract: A method for determining an amount of a Raman-invisible gas in a multi-component gas stream includes performing a first and second absolute Raman analysis on the gas stream. A decrease in the absolute Raman bands from the first analysis to the second analysis is attributed to an increase of the Raman-invisible gas in the gas stream. The amount of the Raman-invisible gas is calculated from the difference between the first and second sets of Raman bands. The calculation of the Raman-invisible gas is verified via a measurement and a calculation of a secondary property of the gas stream such as the thermal conductivity of the gas stream or the density of the gas stream.

公开(公告)号：US20230400413A1

公开(公告)日：2023-12-14

申请号：US17806134

申请日：2022-06-09

Applicant: Endress+Hauser Optical Analysis, Inc.

Inventor： Joseph B. Slater ,  Marc Winter ,  Oliver Link

IPC: G01N21/65 ,  G01N33/00 ,  G01N9/24

CPC classification number: G01N21/65 ,  G01N33/0027 ,  G01N9/24

Abstract: A method for determining an amount of a Raman-invisible gas in a multi-component gas stream includes performing a first and second absolute Raman analysis on the gas stream. A decrease in the absolute Raman bands from the first analysis to the second analysis is attributed to an increase of the Raman-invisible gas in the gas stream. The amount of the Raman-invisible gas is calculated from the difference between the first and second sets of Raman bands. The calculation of the Raman-invisible gas is verified via a measurement and a calculation of a secondary property of the gas stream such as the thermal conductivity of the gas stream or the density of the gas stream.