公开(公告)号：US10139387B2

公开(公告)日：2018-11-27

申请号：US14818623

申请日：2015-08-05

Applicant: ExxonMobil Research and Engineering Company

Inventor： Roger Grant Gaughan ,  David John Abdallah ,  Dennis Harold Hoskin ,  Manuel S. Alvarez ,  Christopher J. Wolfe

IPC: G01N29/036 ,  G01N33/22 ,  G01N29/02 ,  G01N29/44

Abstract: Methods are provided for characterizing the stability of a distillate fraction using a quartz crystal microbalance apparatus, such as a distillate fraction derived at least in part from a pre-refined crude oil. A sample can be aged for an aging period in a quartz crystal microbalance apparatus, and a frequency value for the sample in the quartz crystal microbalance apparatus can be determined before and after the aging period to determine a frequency difference. This frequency difference can be correlated directly with the ability of a jet fuel fraction to satisfy a stability test standard, such as a jet fuel breakpoint stability. The methods can also include using a temperature profile during characterization that can reduce or minimize operator error during the characterization.

公开(公告)号：US09778241B2

公开(公告)日：2017-10-03

申请号：US14818647

申请日：2015-08-05

Applicant: ExxonMobil Research and Engineering Company

Inventor： Roger Grant Gaughan ,  Manuel S. Alvarez ,  David John Abdallah ,  Christopher J. Wolfe

IPC: G01N33/28 ,  G01N29/02 ,  G01N29/036 ,  G01N29/44

CPC classification number: G01N33/2823 ,  G01N29/022 ,  G01N29/036 ,  G01N29/4427 ,  G01N2291/014 ,  G01N2291/0224 ,  G01N2291/0426

Abstract: Methods are provided for characterizing the stability of a distillate fraction using a quartz crystal microbalance apparatus, such as a distillate fraction derived at least in part from a pre-refined crude oil. A sample can be aged for an aging period in a quartz crystal microbalance apparatus, and a frequency value for the sample in the quartz crystal microbalance apparatus can be determined before and after the aging period to determine a frequency difference. This frequency difference can be correlated directly with the ability of a jet fuel fraction to satisfy a stability test standard, such as a jet fuel breakpoint stability. The methods can also include using a temperature profile during characterization that can reduce or minimize operator error during the characterization.