发明名称 QUARTZ CRYSTAL CHARACTERIZATION OF FRACTIONS DERIVED FROM PRE-REFINED CRUDE AND/OR CRACKED STREAMS
摘要 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.
申请公布号 US2016047790(A1) 申请公布日期 2016.02.18
申请号 US201514818647 申请日期 2015.08.05
申请人 Gaughan Roger Grant;Alvarez Manuel S.;Abdallah David John;Wolfe Christopher J. 发明人 Gaughan Roger Grant;Alvarez Manuel S.;Abdallah David John;Wolfe Christopher J.
分类号 G01N33/28;G01N29/42 主分类号 G01N33/28
代理机构 代理人
主权项 1. A method of characterizing a distillate boiling range sample, comprising: determining a breakpoint for a first sample of a distillate fraction, the distillate fraction having an initial boiling point of at least about 284° F. (140° C.) and a final boiling point of about 572° F. (300° C.) or less, the determined breakpoint being greater than about 265° C., at least a portion of the distillate fraction being derived from a pre-refined crude oil, a cracked fraction, or a combination thereof; heating a second sample of the distillate fraction in a vessel of a quartz crystal microbalance apparatus to an aging temperature for an aging period, the quartz crystal microbalance apparatus comprising a quartz crystal, the quartz crystal being disposed in the second sample during the heating; measuring a baseline frequency and an aged frequency of the quartz crystal, the aged frequency being measured after maintaining the second sample of the distillate fraction at the aging temperature for an aging period, the baseline frequency being measured prior to maintaining the second sample of the distillate fraction at the aging temperature for the aging period, a difference between the baseline frequency and the aged frequency for the second sample being greater than or equal to a threshold frequency difference value; hydrotreating or chemical treating a third sample of the distillate fraction under effective treating conditions to form a treated third sample of the distillate fraction; heating at least a portion of the treated third sample of the distillate fraction in a vessel of a quartz crystal microbalance apparatus to the aging temperature for the aging period, the quartz crystal microbalance comprising a quartz crystal, the quartz crystal being disposed in the at least a portion of the treated third sample during the heating; and measuring a baseline frequency and an aged frequency for the at least a portion of the treated third sample of the distillate fraction using a quartz crystal microbalance apparatus, the aged frequency being measured after maintaining the treated third sample of the distillate fraction at the aging temperature for the aging period, a difference between the baseline frequency and the aged frequency for the at least a portion of the treated third sample being less than the threshold frequency difference value.
地址 Biltmore Lake NC US