Abstract:
A method of controlling the inlet valves of a compression-type chemical reactor consists in continuously measuring, during the operation of the reactor (1), the pressure inside its working chambers (4, 5) and supply lines (7, 6) and in determining the sign of the pressure differential (//cP) between the said working chambers (4, 5) and the corresponding supply lines (7, 6). Upon change of sign of the pressure differential (//cP) from "minus" to "plus" a signal is formed for relieving the inlet valves (8, 9) from any controlling influence with the exception of the pressure differential, whereas upon change of sign of the pressure differential (//cP) from "plus" to "minus" a signal is sent for the start of counting a time interval (u), after the expiration of which a signal is formed for closing the inlet valves (8, 9) of the chemical reactor (1). A device for controlling the inlet valves of the compression-type chemical reactor comprises drives (10, 11) for the inlet valves (8, 9) of the chemical reactor (1), pressure sensors (14, 15, 16, 17) mounted inside the working chambers (4, 5) and supply lines (6, 7), comparators (18, 19) connected to the outputs of the sensors (14, 15, 16, 17), units (12, 13) for controlling the drives (10, 11), the inputs of those units being connected, through timers (20, 21), to the outputs of the comparators (18, 19) and their outputs to the drives (10, 11), and a chronometer (22) connected to one of the comparators (18, 19).
Abstract:
A process for the chemical conversion of a reactive feedstock mixture is provided, the process comprising providing an annular reaction chamber having an inlet end and an outlet end; charging to the annular reaction chamber a reactive feedstock to be converted; detonating the reactive feedstock mixture; allowing a detonation wave to propagate around the annular reaction chamber; introducing into the inlet end of the annular reaction chamber the reactive feedstock to maintain propagation of the detonation wave around the annular reaction chamber; allowing components within the reaction chamber to move from the inlet end towards the outlet end; and recovering from the outlet end of the annular reaction chamber the products of chemical conversion of the feedstock by the action of the detonation wave. An apparatus for the conversion of a reactive feedstock is also provided.
Abstract:
A novel process and apparatus is disclosed for performing chemical reactions. Highly compressed gaseous streams such as H2, CO, C02, H20, 02, or CH4 are raised to Mach speeds to form supersonic jets incorporating Shockwaves. Two or more such jets are physically collided together to form a localized reaction zone where the energy from the Shockwaves causes endothermic reactions wherein the chemical bonds of the reactant gases are broken. Between and among reactants molecular surface interaction and molecular surface chemistry take place. In the ensuing exothermic reactions a desired new chemical product is formed and this product is locked into a lower state of enthalpy (state of energy of formation) through adiabatic cooling by means of a free-jet expansion.
Abstract:
Method and system for controlled nanodiamond synthesis based on treating of a specially prepared solid carbon source target including carbon containing material in liquid media by irradiation energy beam focused at a predetermined distance from the target surface and having parameters to produce a light-hydraulic effect impacting the target surface and leading to the forming of diamond nanocrystals.
Abstract:
Изобретение относится к технологии получения аллотропных модификаций углерода и может быть использовано, в частности, для синтеза кристаллов алмазов, получения лонсдейлита, фуллеренов, стеклоуглерода и т.п. В способе получения аллотропных модификаций углерода, включающем электрическое воздействие на углерод в жидкой среде, в качестве электрического воздействия используют электрогидравлическую обработку полидисперсной системы, состоящей из жидкой дисперсионной среды и твердой дисперсной фазы. В качестве полидисперсной системы может быть использована ультрамикрогетерогенная система с размерами частиц дисперсной фазы 10 -7 - 10 -9 м. При этом в качестве дисперсионной среды может быть использована жидкость с водородным показателем (рН) в диапазоне от 6 до 9, в зависимости от конкретной величины которого определяется оптимальная величина мощности электрогидравлического удара. Отношение дисперсионной среды к твердой дисперсной фазе может составлять 50:50. Кроме того, электрогидравлическая обработка полидисперсной системы может осуществляться в присутствии катализатора, такого как железо, или никель, или родий, или палладий, или платина.
Abstract:
The present invention concerns nanometric-sized ceramic materials in the form of multiple crystalline structures, composites, or solid solutions, the process for their synthesis, and uses thereof. These materials are mainly obtained by detonation of two water-in-oil (W/O) emulsions, one of which is prepared with precursors in order to present a detonation regime with temperature lower than 2000°C, and they present a high chemical and crystalline phase homogeneity, individually for each particle, as well as a set of complementary properties adjustable according to the final applications, such as a homogeneous distribution of the primary particles, very high chemical purity level, crystallite size below 50 nm, surface areas by mass unit between 25 and 500 m2/g, and true particle densities higher than 98% of the theoretical density. This set of characteristics makes this materials particularly suitable for a vast range of applications in the nanotechnology field, such as, for example, nanocoatings, magnetic nanofluids, nanocatalysts, nanosensors, nanopigments, nanoadditives, ultra light nanocomposites, drug release nanoparticles, nanomarkers, nanometric films, etc.
Abstract:
The explosive consolidation of semiconductor powders results in thermoelectric materials having reduced thermal conductivity without a concurrent reduction in electrical conductivity and thereby allows the construction of thermoelectric generators having improved conversion efficiencies of heat energy to electrical energy.
Abstract:
Apparatus for the treatment of material comprises a confined volume for receiving the material, and a source of gas at elevated pressure communicable with the interior of the volume. A suitable source of gas is an airgun, or other apparatus capable of releasing a volume of gas at elevated pressure such as at least 1000psi. It is preferred that the source of gas is located within the confined volume. It is also preferred that the confined volume is a pressure vessel. Inlet an outlet valves will assist in loading and unloading material for treatment. Gate valves will further assist by closing when the volume is full. The invention is thus particularly useful in the destruction of chemical and biological agents, for the purification of contaminated water, and for the destruction of tropical and other larvae previously leading to diseases such as Nile Disease, malaria and the like.
Abstract:
A process is provided for conversion of a feedstock, in particular a hydrocarbon feedstock such as methane or natural gas, in which a reactive mixture containing the feedstock is prepared and fed to a reaction zone. A reaction is initiated in the reactive mixture within the reaction zone so as to generate a conversion wave of increased temperature and pressure. The conversion wave is allowed to pass through the reaction zone, from where converted feedstock is recovered. An apparatus for carrying out the process is also provided. The process operates with a high conversion and selectivity to desirable products and is particularly suitable for the conversion of methane to carbon monoxide and hydrogen.
Abstract:
A pulse detonation engine is provided with several detonation combustors (10) selectively coupled to an air inlet (20) and fuel source (31) by a rotary valve (50). The rotary valve (50) isolates the steady operation of the air inlet (20) and fuel system (30) from the unsteady nature of the detonation process, and allows the fueling of some of the detonation chambers (10) while detonation occurs in the other detonation chambers (10). The fuel system (30) can use a solid fueled gas generator.