Separation of n-paraffins by selective adsorption

A study has been undertaken of the vapor-phase adsorptive separation of n-alkanes from Kuwait kerosene (Kuwait National Petroleum Company, heavy kerosene) using zeolite molecular sieves. Due to the shortage of information on the adsorption of multicomponent systems in the open literature, the present investigation was initiated to study the effect of feed flowrate, temperature, and zeolite particle size on the height of mass transfer zone (MTZ) and the dynamic capacity of the adsorbent for multicomponent n-alkanes adsorption on a fixed-bed of zeolite type-5A. The optimum operating conditions for separation of the n-alkanes has been identified so that the effluent would also be of marketable quality. The effect of multicycle adsorption-desorption stages on the dynamic behaviour of zeolite using steam as a desorbing agent has been studied and compared with n-pentane and n-hexane as desorbing agents. The separation process comprised one cycle of adsorption using a fixed-bed of zeolite type-5A. The bed was fed with vaporized kerosene until saturation had been achieved whereby the n-alkanes were adsorbed and the denormalized material eluted. The process of adsorption-desorption was carried out isobarically at one atmosphere. A mathematical model has been developed to predict the breakthrough time using the method of characteristics. The results were in a reasonable agreement with the experimental values. This model has also been utilized to develop the equilibrium isotherm. Optimum operating conditions were achieved at a feed flowrate of 33.33 x 10-9 m3/s, a temperature of 643 K, and a particle size of (1.0 - 2.0) x 10-3 m. This yielded an HMTZ value and a dynamic capacity of 0.206 m and 9.6S3 x 10-2 kg n-alkanes/kg of zeolite respectively. These data will serve as a basis for design of a commercial plant. The purity of liquid-paraffin product desorbed using steam was 83.24 wt%. The dynamic capacity was noticed to decrease sharply with the cycle number, without intermediate reactivation of zeolite, while it was kept unchanged by intermediate reactivation. Normal hexane was found to be the best desorbing agent, the efficiency of which was mounted to 88.2%.

La privatización de la identidad petrolera : De la ilusión la desarraigo

En el presente trabajo estudiamos el proceso de conformación y fragmentación identitaria de los ex trabajadores de una de las empresas petroleras estatales de América Latina más ;importante que fue privatizada en los años 90, la compañía Yacimientos Petrolíferos Fiscales (YPF) de la República Argentina. La identidad laboral de los ex trabajadores petroleros será aprehendida a partir de la reconstrucción de las trayectorias laborales de veinte ex obreros de la Refinería ubicada en la ciudad de Ensenada, Provincia de Buenos Aires. Así entonces en primer lugar presentamos las relaciones existentes entre el mundo del trabajo (la fábrica) y la comunidad de Ensenada en sentido amplio durante los años de auge de la producción petrolera estatal para mostrar la importancia que esta relación tuvo en las identidades de los trabajadores petroleros. En segundo lugar desarrollamos un apartado teórico en el que especificamos el concepto de identidad laboral que utilizamos. En tercer lugar realizamos la reconstrucción y análisis de las trayectorias laborales de los ex obreros petroleros entrevistados aprehendiendo a través de ellas la particular configuración identitaria del trabajador "ypefeano". Finalmente analizamos cómo, con la privatización de la empresa petrolera estatal, la identidad laboral de quienes eran sus trabajadores entró en crisis dando lugar a la construcción de nuevas identidades laborales

La privatización de la identidad petrolera : De la ilusión la desarraigo

En el presente trabajo estudiamos el proceso de conformación y fragmentación identitaria de los ex trabajadores de una de las empresas petroleras estatales de América Latina más ;importante que fue privatizada en los años 90, la compañía Yacimientos Petrolíferos Fiscales (YPF) de la República Argentina. La identidad laboral de los ex trabajadores petroleros será aprehendida a partir de la reconstrucción de las trayectorias laborales de veinte ex obreros de la Refinería ubicada en la ciudad de Ensenada, Provincia de Buenos Aires. Así entonces en primer lugar presentamos las relaciones existentes entre el mundo del trabajo (la fábrica) y la comunidad de Ensenada en sentido amplio durante los años de auge de la producción petrolera estatal para mostrar la importancia que esta relación tuvo en las identidades de los trabajadores petroleros. En segundo lugar desarrollamos un apartado teórico en el que especificamos el concepto de identidad laboral que utilizamos. En tercer lugar realizamos la reconstrucción y análisis de las trayectorias laborales de los ex obreros petroleros entrevistados aprehendiendo a través de ellas la particular configuración identitaria del trabajador "ypefeano". Finalmente analizamos cómo, con la privatización de la empresa petrolera estatal, la identidad laboral de quienes eran sus trabajadores entró en crisis dando lugar a la construcción de nuevas identidades laborales

La privatización de la identidad petrolera : De la ilusión la desarraigo

En el presente trabajo estudiamos el proceso de conformación y fragmentación identitaria de los ex trabajadores de una de las empresas petroleras estatales de América Latina más ;importante que fue privatizada en los años 90, la compañía Yacimientos Petrolíferos Fiscales (YPF) de la República Argentina. La identidad laboral de los ex trabajadores petroleros será aprehendida a partir de la reconstrucción de las trayectorias laborales de veinte ex obreros de la Refinería ubicada en la ciudad de Ensenada, Provincia de Buenos Aires. Así entonces en primer lugar presentamos las relaciones existentes entre el mundo del trabajo (la fábrica) y la comunidad de Ensenada en sentido amplio durante los años de auge de la producción petrolera estatal para mostrar la importancia que esta relación tuvo en las identidades de los trabajadores petroleros. En segundo lugar desarrollamos un apartado teórico en el que especificamos el concepto de identidad laboral que utilizamos. En tercer lugar realizamos la reconstrucción y análisis de las trayectorias laborales de los ex obreros petroleros entrevistados aprehendiendo a través de ellas la particular configuración identitaria del trabajador "ypefeano". Finalmente analizamos cómo, con la privatización de la empresa petrolera estatal, la identidad laboral de quienes eran sus trabajadores entró en crisis dando lugar a la construcción de nuevas identidades laborales

Soil aggressivity consideration for laying petroleum pipelines

The magnitude and volume of transportation of petroleum products (both crude and finished products) has necessitated constructing dedicated pipelines from the refineries to the various consumer centers. The present status and scenario of pipeline transportation has been briefly described. Published literatures covering geotechnical engineering aspects, especially corrosion studies for pipelines are scanty. Available literature has been summarized. Main topic includes soil resistivity survey, classification based on resistivity and various parameters of chemical analysis. Detailed analysis has been carried out from the data generated through field investigation and laboratory tests on soil samples obtained from different locations along the two selected pipeline route where they are to be constructed. Typical data has been analysed for aggressivity. Summary of aggressivity analysis has been presented for the two field cases and modification has been suggested for existing practice.

Analyse géographique des investissements internationaux de la China National Petroleum Corporation

Ce mémoire propose une analyse de l’expansion internationale de la China National Petroleum Corporation (CNPC) et des impacts de cette expansion sur la sécurité énergétique de la Chine. Dans le cadre de cette recherche, l’approvisionnement énergétique d’un pays est jugé sécuritaire lorsqu’une quantité suffisante de ressources nécessaires pour combler sa demande en énergie sont présentes, disponibles et accessibles et que son approvisionnement en services énergétiques demeure fiable et abordable. La recherche comporte quatre volets. Le premier volet porte sur les étapes de la restructuration de l’industrie pétrolière chinoise depuis 1949. Celle-ci est analysée au travers des changements dans les modes de gestion des compagnies pétrolières nationales et dans leurs relations avec le gouvernement chinois. Le deuxième volet traite de la diversification et des nouvelles spécialisations de CNPC. Ces aspects sont étudiés dans le cadre d’une analyse du pourcentage de ses actifs dans chaque segment industriel (aval, intermédiaire et amont) obtenus grâce à ses rapports annuels. Le troisième volet aborde la répartition géographique des activités de la compagnie que l’on étudie à l’aide d’une analyse approfondie de près de 150 investissements, acquisitions et contrats réalisés à l’étranger entre 1992 et 2014. Le quatrième volet aborde les impacts des investissements à l’étranger de la compagnie sur la sécurité énergétique de la Chine. Ces impacts sont mesurés par l’entremise d’une analyse des flux pétroliers internationaux vers la Chine que l’on compare à la production de CNPC par pays. Ce mémoire permet de déterminer que l’expansion internationale de CNPC sert d’abord et avant tout les intérêts économiques de la compagnie. Ce sont surtout ses investissements dans la construction d’infrastructures de transport (oléoducs, gazoducs ainsi que les usines et terminaux de liquéfaction de gaz naturel liquéfié) qui apportent des bénéfices directs à la sécurité énergétique de la Chine. La contribution des investissements dans les autres secteurs est beaucoup moins systématique et dépend largement de la période au cours de laquelle ils ont été effectués.

Estimating mean exposures from censored data: exposure to benzene in the Australian petroleum industry

A retrospective assessment of exposure to benzene was carried out for a nested case control study of lympho-haematopoietic cancers, including leukaemia, in the Australian petroleum industry. Each job or task in the industry was assigned a Base Estimate (BE) of exposure derived from task-based personal exposure assessments carried out by the company occupational hygienists. The BEs corresponded to the estimated arithmetic mean exposure to benzene for each job or task and were used in a deterministic algorithm to estimate the exposure of subjects in the study. Nearly all of the data sets underlying the BEs were found to contain some values below the limit of detection (LOD) of the sampling and analytical methods and some were very heavily censored; up to 95% of the data were below the LOD in some data sets. It was necessary, therefore, to use a method of calculating the arithmetic mean exposures that took into account the censored data. Three different methods were employed in an attempt to select the most appropriate method for the particular data in the study. A common method is to replace the missing (censored) values with half the detection limit. This method has been recommended for data sets where much of the data are below the limit of detection or where the data are highly skewed; with a geometric standard deviation of 3 or more. Another method, involving replacing the censored data with the limit of detection divided by the square root of 2, has been recommended when relatively few data are below the detection limit or where data are not highly skewed. A third method that was examined is Cohen's method. This involves mathematical extrapolation of the left-hand tail of the distribution, based on the distribution of the uncensored data, and calculation of the maximum likelihood estimate of the arithmetic mean. When these three methods were applied to the data in this study it was found that the first two simple methods give similar results in most cases. Cohen's method on the other hand, gave results that were generally, but not always, higher than simpler methods and in some cases gave extremely high and even implausible estimates of the mean. It appears that if the data deviate substantially from a simple log-normal distribution, particularly if high outliers are present, then Cohen's method produces erratic and unreliable estimates. After examining these results, and both the distributions and proportions of censored data, it was decided that the half limit of detection method was most suitable in this particular study.

Artikel 3(1) en (2) van die Mineral and Petroleum Resources Development Act 28 van 2002: 'n herbeskouing

Sections 3(1) and 3(2) of the Mineral and Petroleum Resources Development Act 28 of 2002
This contribution entails a discussion of the impact of section 3 of the Mineral and Petroleum Resources Development Act on various aspects of the new mineral and petroleum law. At the core of the discussion is the question of how this section is interpreted by various commentators, and the implications of the different opinions on the application of the section. The initial discussion highlights problems with the new definition of a "mineral": Soil, including topsoil is at present included in die definition of a "mineral" in the act. The definition should be rectified by the legislature as it has far-reaching consequences in respect of the extent of the state's power in terms of section 3(2) of the act to grant entitlements in respect of minerals, including topsoil. The implications of section 3 for the control and management of minerals are discussed and placed in the context of the question about the constitutionality of the act. It is argued that legislative guidance is urgently needed to clarify continuing uncertainty, caused by sloppy drafting and different opinions about the connection between private law and public law in relation to minerals and the actual position of existing right holders.

Alleged coercive and discriminatory practices against retail gasoline operators by oil company suppliers : interim report of Subcommittee No. 5 on Distribution Problems to the Select Committee on Small Business, House of Representatives, Eighty-fourth Congress, first session, pursuant to H. Res. 114, a resolution creating a Select Committee to Conduct a Study and Investigation of the Problems of Small Business.

Mode of access: Internet.

Oil company pamphlets from the Durrett collection ...

1. Cleveland cherry valley oil co. Prospectus ... 1865.--2. Mass. and oil creek petroleum co., Boston. Prospectus ... 1864.--3. Marsh, Saunders & Cox, Cincinnati. The Thomas oil tract ...

United States of America, petitioner, v. Standard Oil Company of New Jersey et al., defendants.

At head of title: In the Circuit Court of the United States for the Eastern Division of the Eastern Judicial District of Missouri.

Final environmental impact statement : proposed issuance of Federal permits to the Pittston Company of New York for the construction of a 250,000 barrel/day oil refinery and marine terminal, Eastport, Maine /

Cover title.

United States of America, petitioner, v. Standard oil company of New Jersey et al., defendants ...

Vol. 22 and vol. A [v. 23] contain the "Transcript of record" in this case on appeal to the Supreme court of the United States, October term, 1909, no. 725, and are printed by Judd & Detweiler (inc.), printers, Washington, D.C., 1910.

Draft environmental statement : crude oil transportation system, Valdez, Alaska to Midland, Texas (as proposed by SOHIO Transportation Company) : executive summary /

At head of title: Department of the Interior.