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Title: Truck Loading Rack Blending Class Number 2390
Author: David P. Resch
Source: 2002 International School of Hydrocarbon Measurement
Year Published: 2002
Abstract: The loading of petroleum products at truck loading terminals has undergone a great deal of renovation since the early 70s. These changes have taken place thanks mostly to the introduction of electronic instrumentation and control devices, which replaced what was traditionally mechanical equipment at the load rack. Through the 80s and into the early 90s this equipment has been refined and its features expanded to meet the needs of modern truck loading facilities. The electronic preset is responsible for much of this improvement, and while product accountability, reduced operating cost, and improved inventory control continue to be one of the significant benefits of the electronic preset, government regulations will have a large impact on the upgrading effort. The Clean Air Act, which many major metropolitan areas comply with, legislates regulations requiring a certain percentage of oxygenates in the gasolines sold in their area. These regulations may prohibit the petroleum products from being directly delivered in their refined form, and may require that they be blended with products such as Ethanol or Methyl Tertiary Butyl Ether (MTBE). Combining this with the requirements of mid-grade and higher performance type gasolines for todays fuel-efficient automobiles, the blending requirements start to multiply. The scope of this paper will focus on the requirements for blending and how todays electronic preset will meet the challenge by offering two types of blending solutions, the sequential (batch) blender, or the ratio (in line) blender.

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