Abstract: A method is disclosed for the preparation of active magnesium hydride-magnesium-hydrogen storage systems, which reversibly absorb hydrogen, with addition of a catalyst for the absorption of hydrogen with the formation of hydride. Magnesium hydride particles.ltoreq.400 .mu.m in diameter are added in an amount of at least 1.2% by weight, based on the magnesium to be hydrogenated, as catalyst during the first hydrogenation to the finely divided magnesium to be hydrogenated. The hydrogenation is carried out at a temperature of .gtoreq.250.degree. C. and a pressure of 0.5 to 5 MPa. The method is carried out with intensive stirring of the material that is being reacted.

Abstract: A dense pack gas adsorbent means comprising at least one particulate gas adsorbent having a particulate size distribution in which the largest small particles are less than one-third (1/3) the size of the smallest large particle and sixty percent (60%) of the adsorbent particles having a size greater than sixty (60) mesh, said adsorbent particle oriented to provide a packing density grater than one hundred and thirty percent (130%) of the particle's apparent density.

Abstract: The invention is concerned with a high-density adsorbent comprising a compacted mass of high surface area carbon particles bound together with a binder and defining a network of substantially unobstructed micropores, the mass of carbon particles having been compacted under a pressure sufficient to cause a reduction of about 50 to about 200% in bulk volume of the mass and a corresponding increase of about 50 to about 200% in density, thereby providing a gas storage capacity increase of about 20 to about 100% over that of the high surface area carbon particles in loose or uncompacted form. The high-density adsorbent according to the invention is particularly useful in adsorption storage systems for low-pressure storage of compressed natural gas.

Abstract: A dense pack gas adsorbent means comprising at least one particulate gas adsorbent having a particulate size distribution in which the largest small particles are less than one-third (1/3) the size of the smallest large particle and sixty percent (60%) of the adsorbent particles having a size greater than sixty (60) mesh, said adsorbent particle oriented to provide a packing density grater than one hundred and thirty percent (130%) of the particle's apparent density.

Abstract: A high porosity silicocalcareous mass is obtained by using in at least partial replacement of the usual silica, amorphous ultrafine synthetic silica particles having a specific surface between 150 and 300 m.sup.2 per gram, and a high absorption capacity, and optionally adding nonreactive synthetic fiber of either inorganic or organic origin to the mixture containing the particles. The high-porosity silicocalcareous mass can be used as a lining material for containers, which are intended for storing liquified or dissolved gases and also as an insulation material, such as sound insulation in building construction.

Abstract: A new polymerization catalyst system comprising an aluminum compound and a transition metal compound on an alumina-based aerogel support, a process for preparing the polymerization catalyst system and use of the catalyst system for polymerization and copolymerization of alpha-olefins are disclosed. A heat-activated alumina-based aerogel useful as a catalyst support and having a morphology by transmission electron microcopy comprising extremely thin folded film-like ribbons or plates and having a high BET surface area, high pore volume, and low bulk density is also disclosed.