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JournalISSN: 0569-3799

Preprints-American Chemical Society Division of Petroleum Chemistry 

About: Preprints-American Chemical Society Division of Petroleum Chemistry is an academic journal. The journal publishes majorly in the area(s): Catalysis & Jet fuel. It has an ISSN identifier of 0569-3799. Over the lifetime, 1242 publication(s) have been published receiving 7130 citation(s).

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Journal Article
Abstract: The tetrahedral framework structure of zeolite beta is disordered along (001). The disordered structure is related by a/3 and/or b/3 displacements on (001) planes to three ordered polytype structures with triclinic, monoclinic, and tetragonal symmetry. Three mutually perpendicular 12-ring channel systems are characteristic of the three ordered polytypes and the disordered beta structure. The proposed framework structures are consistent with the known diffraction, sorption an cation exchange properties of zeolite beta.

406 citations

Journal Article
Abstract: Coke formation during the thermolysis of petroleum residua is postulated to occur by a mechanism that involve the liquid-liquid phase separation of reacted asphaltene to form a phase that is been in abstractable hydrogen. This mechanism provide the basis of a model that quantitatively describe the kinetics for the thermolysis of ColD Lake vacuum residuum and its deasphalted oil in a open fuse reactor at 400°C. The previously unreacted asphaltene were found to be the fraction with the highest rate of thermal reaction but with the least extend of reaction. Further evidence of the liquid-liquid phase separation was the observation of spherical particle of liquid crystalline coke and the preferential conversion of the most associated asphatene to coke

253 citations

Journal Article
Abstract: Nitric oxide gas (NO) is effectively reduced by retorted oil shale. At 300/sup 0/C half of the NO in a gas stream is removed when the gas stream contacts a bed of crushed retorted oil shale for 0.4 s. The fraction removed in 0.4 s reaches 90% at a temperature of 375/sup 0/C. As long as the reducing agent, presumed to be char in the retorted shale, is not depleted, the rate of reduction of NO appears to be proportional to the partial pressure of NO, and our results can be expressed in terms of a rate constant (k) which is a function of temperature (T, Kelvin) as follows: k = Ae/sup -//sup E/RT/ (s/sup -1/), where A = 4.0 x 10/sup 5/ (s/sup -1/) and E = 59.7 kJ/mole. This rate is many times faster than the rate of reduction of NO by coal char as measured by Furusawa et al. (1983). The principal reduction reaction is unknown; it does not release CO/sub 2/.

157 citations

Journal Article
Abstract: The objective of this work was to obtain kinetic data on a well-characterized, titania-supported catalyst under commercially-representative reaction conditions. Effects of water partial pressure on the activity of Co/titania were also considered.

133 citations

Journal Article
Abstract: Etude de la composition chimique et de la maturation d'huiles provenant du Bassin Adriatique afin d'etablir des correlations entre la nature des huiles et les roches meres. L'etude experimentale est realisee en combinant l'utilisation de marqueurs biologiques et l'analyse des isotopes stables

126 citations

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