Marathon Petroleum Corporation is a United States based oil refining, marketing, and pipeline transport company. The company was formed as a subsidiary on September 1, 2005, from the former Marathon Ashland Petroleum, LLC, and is based in Findlay, Ohio. Marathon Petroleum operated as a subsidiary of the Marathon Oil Corporation until July 1, 2011. Wikipedia.
Hoekman S.K.,Desert Research Institute |
Broch A.,Desert Research Institute |
Robbins C.,Desert Research Institute |
Ceniceros E.,Desert Research Institute |
Natarajan M.,Marathon Petroleum
Renewable and Sustainable Energy Reviews | Year: 2012
Biodiesel is a renewable transportation fuel consisting of fatty acid methyl esters (FAME), generally produced by transesterification of vegetable oils and animal fats. In this review, the fatty acid (FA) profiles of 12 common biodiesel feedstocks were summarized. Considerable compositional variability exists across the range of feedstocks. For example, coconut, palm and tallow contain high amounts of saturated FA; while corn, rapeseed, safflower, soy, and sunflower are dominated by unsaturated FA. Much less information is available regarding the FA profiles of algal lipids that could serve as biodiesel feedstocks. However, some algal species contain considerably higher levels of poly-unsaturated FA than is typically found in vegetable oils. Differences in chemical and physical properties among biodiesel fuels can be explained largely by the fuels' FA profiles. Two features that are especially influential are the size distribution and the degree of unsaturation within the FA structures. For the 12 biodiesel types reviewed here, it was shown that several fuel properties - including viscosity, specific gravity, cetane number, iodine value, and low temperature performance metrics - are highly correlated with the average unsaturation of the FAME profiles. Due to opposing effects of certain FAME structural features, it is not possible to define a single composition that is optimum with respect to all important fuel properties. However, to ensure satisfactory in-use performance with respect to low temperature operability and oxidative stability, biodiesel should contain relatively low concentrations of both long-chain saturated FAME and poly-unsaturated FAME. © 2011 Elsevier Ltd. All rights reserved.
Marathon Petroleum | Date: 2015-02-05
This dual packing chamber is for use within a valve for existing pipelines. The secondary packing chamber can be easily incorporated into existing valves already in use. In the preferred embodiment, the secondary packing chamber is seated between the body of a valve and the yoke tube. The invention creates a primary packing chamber and a secondary packing chamber that acts as a stopper should the first packing chamber fail to ensure fluid is not accidently released to the environment.
Marathon Petroleum | Date: 2015-02-12
This vapor control logic system is for optimizing terminal loading capacity by controlling load rack fuel dispensing with a vapor recovery unit (VRU) to prevent undesirable shutdown of fuel dispensing at terminal facilities.
Marathon Petroleum | Date: 2012-12-05
This instrumental method requires no sample preparation to determine not only whether a fuel contains DRA, but also the manufacturer(s) of the DRA. To date, there is no available method to quickly and easily perform this analysis. Only 60 microliters of sample are needed for the determination, which can be performed within two hours.
Marathon Petroleum | Date: 2012-11-20
Optimizing low coke naphtha reforming continues to pose significant challenges for oil refining companies in the operation of continuous catalytic regenerative reforming units for economic production of hydrogen, LPG and reformate. A novel processing scheme is hereby disclosed wherein multiple additives are used to increase spent catalyst coke to ensure operating the regenerators in steady state white burn operations. In previous disclosures novel additives sulfur and kerosene were identified as separately imparting enhanced rates of coke formation on the catalysts even at very mild severity catalytic reforming operations. To further accelerate spent catalyst coke formation and derive benefits from synergistic use of sulfur and kerosene, it is suggested that both sulfur and kerosene be used as additives in combination or in series with sulfur added first followed by kerosene and vice versa.