Abstract:
A power system has a fuel reformer, an emission abatement device, and a fuel cell. The fuel reformer reforms hydrocarbons fuels so as to produce a reformate gas which is supplied to both the emission abatement device and the fuel cell. A method of operating a fuel reformer so as to generate and supply a reformate gas to both an emission abatement device and a fuel cell is also disclosed.
Abstract:
The present invention is a method for predicting polymer latex properties for an emulsion polymer latex based on statistical relationships between the polymer latex properties and process parameters for the emulsion polymerization process. The method for predicting one or more polymer latex properties for an emulsion polymer latex according to the invention includes conducting an emulsion polymerization process in a reactor including one or more reactor inputs to produce an emulsion polymer latex, measuring a set of process parameters for the emulsion polymerization process, performing a heat balance and a mass balance across the reactor based on the set of measured process parameters to determine a set of calculated polymer latex properties for the emulsion polymerization process, and determining one or more predicted polymer latex properties for the emulsion polymer being prepared in the emulsion polymerization process using the measured process parameters, the calculated polymer latex properties, and a set of predetermined statistical relationships between the process parameters and the polymer latex properties to be predicted. The present inventionalso includes an apparatus and a computer program product for predicting the polymer latex properties of an emulsion polymer latex.
Abstract:
An instrument is disclosed fro microwave-assisted chemical processes that avoids tuning discrepancies that otherwise result based upon the materials being heated. The instrument includes a source of microwave radiation, a waveguide in communication with the source, with at least a portion of the waveguide forming a cylindrical arc, a cylindrical cavity inmediately surrounded by the cylindrical arc portions of the waveguide, and at least three slotted openings in the circumference of the circular waveguide that provide microwave communication between the waveguide and the cavity.
Abstract:
Methanol and carbon monoxide are fed to a liquid reaction system (3) containing a carbonylation catalyst system through feeding lines (17) and (19), respectively, a part of the reaction mixture containing the resulting acetic acid is withdrawn from the reaction system and is fed to a flash distillation column (4) while maintaining the liquid surface of the reaction system at a constant level, and a high boiling point fraction containing the carbonylation catalyst system is separated by the flash distillation and recycled to the reaction system (3) through a recycle line (21). In the recycle line (21), flow rate and temperature are measured by means of a flow sensor (F3) and a temperature sensor (T2), respectively. The temperature of the high boiling point fraction to be recycled is controlled by a temperature adjusting unit (6) utilizing a controlling unit (8) on the basis of the data measured above, so as to suppress the variation of the temperature and pressure of the above reaction system.
Abstract:
Since steam-reforming reaction is attended by formation of carbon monoxide as a by-product, a converter for causing water and carbon monoxide to shift-react is often used additionally. Generally, in stabilized operation, almost no increase in carbon monoxide concentration is observed. However, conditions for using a catalyst in the converter will vary owing to some external cause or other, presenting a problem that carbon monoxide concentration increases. In a device for feeding hydrogen gas from a gas feeder (1) to a converter, which comprises a reformer (1) including carbon monoxide and steam, and a converter (3) provided with a conversion catalyst (3a), the hydrogen gas outlet port of the converter is provided with a carbon monoxide concentration detecting means (6), so that when the detected value of carbon monoxide concentration in the carbon monoxide concentration detecting means (6) becomes larger than a preset value, the amount of steam in the gas feeder (1) is increased.
Abstract:
A dissolution testing system comprises a vessel plate on which a plurality of vessels are mounted. Each vessel including a lateral wall having an outer surface around which a plurality of flexible heater elements are attached. Each heater element includes a transparent surface area, a heat conductive element extending along the transparent surface area, a temperature sensing element extending along the transparent surface area, and an electrical contact element connected to the heat conductive element and the temperature sensing element. The transparent heater element allows unobstructed view into the interior of its vessel, and reduces the time required to achieve a stabilized set point temperature in the vessel. A heater control system communicates with each heat conductive element and each temperature sensing element through a corresponding one of the electrical contact elements. The heater control system permits each vessel to be controlled independently of the other vessels.
Abstract:
The invention relates to a method for continuously producing cross-linked, fine-particle geleous polymerizates by copolymerizing: a) water-soluble, monoethylenically unsaturated monomers; b) 0.001 to 5 mol %, with regard to monomers (a), of monomers containing at least two ethylenically unsaturated double bonds, and; (c) 0 to 20 mol %, with regard to monomers (a), of water-insoluble monoethylenically unsaturated monomers in 20 to 80 wt. % of an aqueous solution in the presence of an initiator and at temperatures ranging from 0 to 140 DEG C, whereby the aqueous solution of the monomers, together with the initiator and an inert gas, are continuously fed to a kneader-mixer having at least two shafts which rotate parallel to the axis. A number of kneading and transport elements are situated on the shafts and deliver the substances, which are added at the entry to the kneader-mixer, in an axial direction to the end of the mixer. The inventive method is characterized in that the proportion of the heat dissipation effected by evaporating water out of the reaction mixture equals at least 5 % of the reaction heat, and the proportion of the heat dissipation effected by product discharge equals at least 25 % of the reaction heat, and the remaining heat dissipation is effected by cooling the reactor walls.
Abstract:
In an exemplary embodiment, the apparatus includes a reaction vessel (2) having an interior portion adapted to receive a reaction mixture. An agitator (10) is disposed relative to the reaction vessel (2) such that the agitator (10) is capable of agitating the reaction mixture. A conduit (11) is placed in fluid communication with the interior portion of the reaction vessel (2). A temperature probe (13) is placed in thermal communication with the reaction vessel (2), and an optical analyzer (20) adapted to perform real-time in situ analysis of the reaction mixture is placed proximate or within the reaction vessel (2). In operation, the reaction is monitored and reaction conditions are adjusted, if necessary, to maintain the reaction within pre-determined parameters. The reactor can be used for parallel screening of potential reactants and process conditions.
Abstract:
In a high pressure and high temperature reaction system suitable for oxidative waste treatment, particularly a reaction system for supercritical water oxidation (SCWO), a method is disclosed for injecting a first fluid of a first temperature at a first flow rate into a second fluid of a second temperature at a second flow rate, mixing the first and the second fluids within a mixing length (115, 215), and wherein the first and second temperatures and the first and second flow rates are selected such that a temperature of the mixed fluids downstream of said mixing length (115, 215) is obtained, at which said first fluid being substantially non-corrosive.
Abstract:
A method for treating an aqueous medium which comprises a first step treatment wherein an aqueous medium to be treated is subjected to an ordinary hydrothermal reaction or an ordinary electrolysis, to thereby decompose easily decomposable substances, ammonia or organic compounds capable of being decomposed by electrolysis alone, and a second step treatment wherein the resulting aqueous medium is subjected to a hydrothermal electrolysis reaction, to thereby decompose remaining organic substances. The employment of the method results in marked decrease of the electric power consumption in the second step of hydrothermal electrolysis. The method can be used for providing an apparatus and a method for treating an aqueous medium at a reduced running cost through decreasing the electric power consumption required for hydrothermal electrolysis reaction.