In a fixed bed of porous catalyst pellets, there are developed two composition and temperature fields, one in the fluid phase and the other one at the level of solid pellets. The objective of this work is to evaluate, by numerical simulation, the unsteady state behavior of a catalyst pellet in typical operating conditions for methanol synthesis reactors. The process kinetics was described by th...

Phytochrome is consistently observed in pellets centrifuged from homogenates of etiolated, 5-day-old oat seedlings. The majority of pigment associated with the pellet cannot be removed by buffer washes, nor can appreciable quantities of additional phytochrome be adsorbed onto the sedimented material. Over 70% of phytochrome in the pellet is released by 1% Triton X-100.Storage at 0 degrees , irr...

Discrete element method (DEM) simulation is widely used to calculate the flow characteristics of particles under certain conditions. DEM input parameters are prerequisite for accurate modeling and particles. In order explore mechanical properties breaking behavior gluten pellets, pellet material property, interaction pellet–stainless steel pellet–pellet (multi-spheres autofill model), bonding (...

The primary objective of pelleting is to produce a palatable, high quality product with minimum production expense. Manipulation of the feed pellets during the storage, transporting, and transfer to feeding lots seriously reduces the number of feed pellets that finally reach the feed pans. It seems that the best solution for this problem is to increase the Pellet Durability Index (PDI) of the f...

Objective: In this study investigated effects of different amounts of pelleted manure with urea and micro elements on yield and seed quality of medicinal plants, pumpkin (Cucurbita pepo var. styriaca). Methods: The animal manure and urea as pellet with four levels (150 Kg urea, 50 Kg urea + 3.5 ton animal manure, 100 (Kg) urea+ 1.5 ton animal manure and 150 (Kg) urea+1.5 ton animal man...

background: this study was conducted to assess the effect of thickness and hydration condition on the surface microhardness of endosequence root repair material putty (errm; brasseler usa, savannah, ga), a premixed bioceramic material. materials and methods: polymethyl methacrylate cylindrical molds with an internal diameter of 4 mm and three heights of 2, 4, and 6 mm were fabricated. in group ...

in this research, the effects of oxygen injection during the induration process were studied in order to improve the quality specifications and increase the rate of production of the iron oxide pellets. several experiments were carried out in palletizing pilot plant in different conditions of oxygen injection. the results suggested that if only the extra oxygen was injected into the furnace in ...

Abstract Fecal-pellet surveys provide density estimates of pellet groups, which offer a quick and reliable index population densities for white-tailed deer Odocoileus virginianus other wildlife species. Comparisons differing fecal-pellet survey methodologies have previously shown that they vary in the precision. However, researchers made these comparisons outside United States regions with lowe...