A process for the catalytic oxidation of ammonia, comprising: passing an ammonia-containing gas, in the presence of oxygen, over a catalyst contained in a reactor, obtaining a process gas containing nitrogen oxides, and cooling said process gas with a heat exchanger accommodated in the reactor, wherein a portion of said process gas, located in the shell side, bypasses the heat exchanger and forms a hot current which mixes with cooled gas downstream the heat exchanger, and the bypass is regulated on the basis of a target outlet temperature of the mixed process gas.

The present invention relates to a modular reactor system for carrying out processes comprising mixing, chemical reactions, heat exchange and/or separations, the reactor system comprising of at least one additive manufactured module, the module each performing at least one process unit operation, and optionally, an external housing.

A method of continuously recovering hydrocarbons from carbon ores can include providing first and second vessels containing rubblized carbon ore. A cooling fuel gas can be introduced into the first vessel. The cooling fuel gas can include oxygen and a recycle gas from the second vessel, which includes hydrocarbons and oxidation products. The oxygen can be consumed through oxidation in an oxidation zone in the first vessel. The temperature of the oxidation zone can be controlled by limiting the oxygen concentration in the cooling fuel gas. This can produce a hot oxidation product gas that heats rubblized carbon ore in a pyrolysis zone downstream of the oxidation zone. Gaseous and vapor hydrocarbons can be produced in the pyrolysis zone. The vapor hydrocarbons can be condensed in a condensing zone downstream of the pyrolysis zone and then collected. The remaining gaseous hydrocarbons and oxidation products can be recycled as the recycle gas. The oxidation zone and the pyrolysis zone can continuously move through the rubblized carbon ore in a downstream direction. Optionally, by using nitrogen free oxygen for the oxidation, a nitrogen free stream of carbon dioxide is produced suitable for carbon dioxide capture and management. This can also eliminate the production of NOx in the oxidation process.

The invention provides a reactor assembly (1) comprising a reactor (30), wherein the reactor (30) is configured for hosting a fluid (100) to be treated with light source radiation (11) selected from one or more of UV radiation, visible radiation, and IR radiation, wherein the reactor (30) comprises a reactor wall (35) which is transmissive for the light source radiation (11), wherein: (i) the reactor (30) is a tubular reactor (130), and wherein the reactor wall (35) defines the tubular reactor (130); (ii) the tubular reactor (130) is configured in a tubular arrangement (1130); and (iii) the reactor assembly (1) further comprises a reactor support element (40), wherein (a) the reactor support element (40) encloses at least part of the tubular arrangement (1130) or wherein (b) the tubular arrangement (1130) encloses at least part of the reactor support element (40); wherein part of the tubular arrangement (1130) is configured in contact with the reactor support element (40), and wherein another part of the tubular arrangement (1130) and the reactor support element (40) define one or more fluid transport channels (7).

A heat exchange structure includes: two flow channels stacked in a stacking direction (Y direction) and thermally coupled to each other; and a fin structure detachably installed in at least one flow channel of the two flow channels. The fin structure includes fins arranged in a longitudinal direction (Z direction) of the at least one flow channel in which the fin structure is installed, the fins configured to form openings alternately arranged along the at least one flow channel on one side and the other side of the at least one flow channel in the stacking direction.

A method for controlling temperature of a chemical reaction without measuring a temperature of the chemical reaction. Changes in mass of a chemical reaction are monitored and are used to calculate the temperature of the system. The reaction can be maintained at a desired temperature (T) without measuring the temperature. The disclosed method is useful for reactions that occur at non-equilibrium conditions where any measured temperature would presume steady-state conditions.

A method for preparing a thermoplastic polyurethane elastomer material with micro air holes is provided. The method comprises the following steps: (1) is feeding liquid raw materials such as diisocyanate molecules and solid additives into a double-screw reactor to trigger a polymerization type chain extension reaction and then obtain a macromolecular weight hot melt. (2) is pushing the macromolecular weight hot melt into a mixing extruder and allowing the reaction to continue to obtain a macromolecular thermoplastic polyurethane melt. (3) is continuously adding the obtained macromolecular thermoplastic polyurethane melt together with polymer particles into a foaming extruder, and extruding the high-pressure hot melt from a mold head into an underwater granulation chamber. (4) is delivering the particles obtained after granulation into a separator by process water via a multi-stage pressure-release process water pipeline, separating, screening and drying the required particles to obtain the target product.

The present invention relates to a method for preparing a modification polymerization initiator with a high conversion ratio by minimizing side reactions. According to the method for preparing a modification polymerization initiator, a modification polymerization initiator which may easily initiate polymerization and provide a polymer with a functional group having affinity with a filler, may be prepared. Particularly, by performing the method using a continuous reactor, the production of by-products may be decreased, and as a result, the conversion ratio may be increased and a modification polymerization initiator with high purity may be prepared in a high yield.

The invention relates to a process for preparing a synthetic IZM-2 zeolite, which consists in performing a hydrothermal treatment of an aqueous gel containing a source of silicon and a source of amorphous aluminium, two nitrogenous or structuring organic compounds including two quaternary ammonium functions, 1,6-bis(methylpiperidinium)hexane dihydroxide and 1,6-bis(methylpiperidinium)hexane dibromide, used as a mixture, in combination with a source of a specific alkali metal chloride M (preferably NaCl), the aqueous gel not comprising any source of at least one fluoride anion.

The present disclosure discloses a device and a method for continuously producing catalysts based on low-temperature coprecipitation. The device mainly includes: a metal salt preparation kettle, a primary reaction kettle, a secondary reaction kettle, a precipitant preparation kettle, a circulating refrigeration system, an automatic control system, a non-aqueous solvent storage tank and a water storage tank. Independent preparation kettles are provided for rapid dissolution of the raw materials, and can be used to prepare the raw materials for the next batch during the reactions that are carried out in the primary and secondary reaction kettles; the circulating refrigeration system refrigerates the primary and secondary reaction kettles, and thus during the reaction, the low-temperature precipitant makes it possible to offset the precipitation reaction heat and the heat caused by the stirring in the primary reaction kettle, and improve the refrigeration efficiency of the primary reaction kettle.