摘要:
The present invention is directed to an improved method for carrying out a exothermic chemical reaction with carbon dioxide in an aqueous environment. In the method, a fluid solution containing at least one chemical reactant which is exothermically reactive with carbon dioxide is provided. Liquid carbon dioxide is then injected into the solution of the chemical reactant at a pressure above the triple point of at least about 60 psig. The injection of the liquid carbon dioxide takes place under turbulent conditions wherein the liquid carbon dioxide expands to provide carbon dioxide vapor. The carbon dioxide vapor superheats to approach the exothermic reaction temperature which occurs between the carbon dioxide vapor and the chemical reactant. The chemical reactant and the carbon dioxide react in the dispersion exothermically to produce a chemical reaction product. The flow rate of liquid carbon dioxide can be controlled to control the reaction temperature without the encessity for providing any reactor cooling or heat exchange apparatus.
摘要:
A wet flue gas desulfurization process for removing sulfur dioxide from flue gases. The process utilizes an ammonium sulfate scrubbing solution (22) to produce ammonium sulfate as a valuable byproduct. The scrubbing solution (22) contacts the flue gases and absorbs sulfur dioxide within an absorber (12) of a flue gas scrubbing apparatus (10), and is then accumulated in a tank (18) where the absorbed sulfur dioxide is reacted with oxygen and ammonia to produce ammonium sulfate. The scrubbing solution (22) has a concentration of greater than 46 % ammonium sulfate so as to have suspended solids of ammonium sulfate precipitate, preferably 1 % to 20 % suspended solids.
摘要:
A furnace is provided having at least two regenerator beds for heat recovery. While a first bed is being heated by hot flue gases produced by combusting a fuel and an oxidant in the furnace, a second bed, heated during a previous cycle, is cooled through carrying out an endothermic chemical reaction therein, for example the reforming reaction of a hydrocarbon with water vapor and carbon dioxide and/or the dissociation of a hydrocarbon. Once the second bed is cooled by the endothermic reaction, the hot flue gases are redirected to it while the first bed, now hot, is used for carrying out the endothermic chemical reaction. Thereafter the cycle is repeated.
摘要:
A process for high-efficiency catalytic conversion of carbon monoxide (CO) to carbon dioxide (CO 2 ) of the type comprising the steps of feeding at predetermined speed a gaseous flow comprising carbon monoxide to a reaction space (3) and reacting in the reaction space (3) said carbon monoxide to obtain a gaseous flow comprising carbon dioxide is distinguished by the preliminary step of accelerating said gaseous flow comprising carbon monoxide upstream of said reaction space (3).
摘要:
Pour mettre en oeuvre une réaction chimique triphasique sous pression, telle que la réaction de réduction du nitrate d'uranyle en nitrate uraneux par l'hydrogène, en présence d'un catalyseur constitué par du platine sur un support en silice, on utilise un réacteur (10) de type gazosiphon. Le contrôle de la pression dans le réacteur (10) est assuré en régulant les débits de liquide et de gaz issus d'un séparateur haute pression (52), dans lequel sont acheminés le liquide et le gaz sortant du réacteur (10). Le liquide est prélevé dans le réacteur (10) par un piquage latéral (32) doté d'un filtre (36) et débouchant dans la région supérieure (30), derrière une paroi profilée (34).
摘要:
1. A process for contracting at least two reactive gaseous compounds from at least two separated primary gaseous flows characterized in that prior to the step of contacting said two compounds, each of the two primary flows is divided into separate secondary flows, then said separate secondary flows are brought into contact with each other so as to form repetitive units of elementary mixtures of said two compounds.
摘要:
Procédé et dispositif de mise en contact d'au moins deux composés sous forme gazeuse, caractérisés par le fait que les gaz amenés selon les collecteurs (3) et (4) sont injectés à travers des orifices disposés selon des motifs répétitifs (5), (6) dans la partie (1) d'une chambre (2). Ils s'appliquent notamment au cas où l'un des gaz comprend de l'oxygène ou du chlore et où un autre gaz comprend de l'hydrogène et/ou des hydrocarbures.