公开(公告)号：US20230083257A1

公开(公告)日：2023-03-16

申请号：US17790336

申请日：2020-12-31

Applicant: The Texas A&M University System ,  Chevron U.S.A. Inc.

Inventor： Suresh D. Pillai ,  David Staack ,  John Lassalle ,  Thomas Hoelen ,  Paul Bireta

IPC: C02F9/00

Abstract: A method of waste treatment includes treating partially-dewatered matrix with a first electron-beam radiation dose. The treated partially-dewatered matrix is transferred to a digester where the treated partially-dewatered matrix is subjected to anaerobic digestion. Biogas is recovered from the treated partially-dewatered matrix during the anaerobic digestion. The treated partially-dewatered matrix is dried and subjected to a second electron-beam radiation dose.

公开(公告)号：US20180017540A1

公开(公告)日：2018-01-18

申请号：US15648028

申请日：2017-07-12

Applicant: Chevron U.S.A. Inc.

Inventor： Toni Zhang Miao ,  Rachel Mohler ,  Deyuan Kong ,  Ajit Ramachandra Pradhan ,  Michael E. Moir ,  Thomas Hoelen

IPC: G01N33/24 ,  G01N21/3563 ,  G01N21/552 ,  G01N30/02

CPC classification number: G01N33/241 ,  G01N21/3563 ,  G01N21/552 ,  G01N30/8693 ,  G01N2021/3595 ,  G01N2030/025 ,  G01N2030/8854 ,  G01N2201/0221 ,  G01N2201/129

Abstract: Disclosed is a method for generating a site specific model for predicting TPH concentration in soil. The method includes dividing a plurality of soil samples taken from a field site into two sets of samples. One set is analyzed using GC-FID, and the other set is analyzed using a handheld FTIR spectrometer with an ATR window to obtain FTIR-ATR absorbance data. Partial least squares regression analysis is used to correlate the GC-FID TPH concentration data with the absorbance data to generate a calibration model. The model is validated with soil samples having unknown TPH concentration. The model is used to predict the TPH concentration of soil samples taken from the field site analyzed using the handheld Fourier transform-infrared spectrometer to obtain FTIR-ATR absorbance data for the soil samples. During all absorbance measurements, each of the soil samples has a moisture content of 1 to 30 wt % and each sample is pressed against the ATR window with sufficient pressure to ensure intimate contact between the sample and the window.

公开(公告)号：US10041926B2

公开(公告)日：2018-08-07

申请号：US15648028

申请日：2017-07-12

Applicant: Chevron U.S.A. Inc.

Inventor： Toni Zhang Miao ,  Rachel Mohler ,  Deyuan Kong ,  Ajit Ramachandra Pradhan ,  Michael E. Moir ,  Thomas Hoelen

IPC: G01N33/24 ,  G01N21/3563 ,  G01N21/552 ,  G01N30/02

Abstract: Disclosed is a method for generating a site specific model for predicting TPH concentration in soil. The method includes dividing a plurality of soil samples taken from a field site into two sets of samples. One set is analyzed using GC-FID, and the other set is analyzed using a handheld FTIR spectrometer with an ATR window to obtain FTIR-ATR absorbance data. Partial least squares regression analysis is used to correlate the GC-FID TPH concentration data with the absorbance data to generate a calibration model. The model is validated with soil samples having unknown TPH concentration. The model is used to predict the TPH concentration of soil samples taken from the field site analyzed using the handheld Fourier transform-infrared spectrometer to obtain FTIR-ATR absorbance data for the soil samples. During all absorbance measurements, each of the soil samples has a moisture content of 1 to 30 wt % and each sample is pressed against the ATR window with sufficient pressure to ensure intimate contact between the sample and the window.

公开(公告)号：US10399130B2

公开(公告)日：2019-09-03

申请号：US15744358

申请日：2016-07-18

Applicant: Arizona Board of Regents on behalf of Arizona State University ,  CHEVRON U.S.A. INC.

Inventor： Rolf U. Halden ,  Edward Kavazanjian ,  Alizee M. Jenck ,  Nasser Hamdan ,  Thomas Hoelen

IPC: B09C1/08 ,  B09C1/00 ,  C04B14/10 ,  C08B37/00 ,  E02D31/00

Abstract: A method for installing an in situ, low-permeability temporary horizontal barrier at depth for vertical containment of a soil mass including installing a low permeability vertical barrier having walls located to contain a predetermined soil volume, the vertical barrier having a horizontal surface area in a plane perpendicular to its walls; and injecting low permeability reagents capable of forming a temporary horizontal barrier in a pattern suitable for creating a horizontal subsurface barrier joined to all of the vertical barrier walls to form an in situ barrier.