Mobil

About: Mobil is a based out in . It is known for research contribution in the topics: Catalysis & Zeolite. The organization has 7085 authors who have published 10642 publications receiving 237497 citations. The organization is also known as: Socony-Vacuum Oil Company & Standard Oil Company of New York.

Molecular Distributions of Normal Fatty Acids and Paraffins in Some Lower Cretaceous Sediments

Abstract: Molecular Distributions of Normal Fatty Acids and Paraffins in Some Lower Cretaceous Sediments

Conversion of methanol and dimethyl ether

Abstract: Methanol and dimethyl ether are converted to a reaction product containing olefins. The conversion is carried out employing a catalyst comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index of about 1 to 12, and containing phosphorus incorporated with the crystal structure thereof in an amount of at least about 0.78 percent by weight.

Economic Ordering Frequency for two Items Jointly Replenished

Abstract: The decision model to be presented is typically applicable to the batch processing industry where a batch of product is blended and subsequently packaged into various types of containers. When a product is packaged into more than one type container immediately after its manufacture, these items are said to be jointly replenished. In the case of joint replenishment, the economic lot size for each item cannot be determined without considering the rest of the items within the group. This is so because each time a batch of a product is made, there is a primary set-up cost for the manufacture of the product and a secondary set-up cost for each of the items to be packaged within the jointly replenished group. If the packaging set-up costs are very high, it may be more economical to package certain “slow moving” items less often than the “fast moving items.” Specifically, one could package a “slow moving” item once every other time or every third time a batch of product is made. An analytical model has been developed to provide a set of criteria which one can use as a basis for applying “skipping rules” to the slow moving item within a jointly replenished group.

Derivation of the Forchheimer Law via Homogenization

Abstract: In this paper we derive the Forchheimer law via the theory of homogenization. In particular, we study the nonlinear correction to Darcy's law due to inertial effects on the flow of a Newtonian fluid in rigid porous media. A general formula for this correction term is derived directly from the Navier–Stokes equation via homogenization. Unlike other studies based on the same approach that concluded for the nonlinear correction to be cubic in velocity for isotropic media, the present work shows that the nonlinear correction is quadratic. An example is constructed to illustrate our theory. In this example, the analytic solution to the Navier–Stokes equation is obtained and is utilized to show the validity of the quadratic correction. Both incompressible and compressible fluids are considered.