Abstract:
The present disclosure relates to a process for production of a monoalkyl aromatic compound by alkylation of alkylatable aromatic compounds with an alkylating agent in a reactor comprising at least a first and a second series-connected alkylation reaction zones and a cooler disposed between the first and the second series-connected alkylation reaction zones. The process comprising a step of cooling at least a portion of an effluent withdrawn from the first alkylation reaction zone before being introduced into the second alkylation reaction zone.
Abstract:
A tubular reactor that produces maleic anhydride from a gas mixture containing n-butane and oxygen includes a first reaction zone including an inlet for the gas mixture and a second reaction zone including an outlet for a reaction gas mixture, a plurality of tubes extending in an axial direction through the first and second reaction zones, a temperature control system, configured for controlling a reaction temperature in each of the reaction zones independently, includes a heat transfer system for each of the reaction zones configured for controlling the temperature of a liquid coolant flowing through one of the reaction zones, and a circulation pumping system configured for controlling flow conditions of the liquid coolant flowing through the reactor and one of the heat transfer systems, and a preheating arrangement configured for preheating the gas mixture such that the gas mixture enters the first reaction zone at a predefined inlet temperature.
Abstract:
A reactor for producing a solid carbon material comprising at least one reaction chamber configured to produce a solid carbon material and water vapor through a reduction reaction between at least one carbon oxide and at least one gaseous reducing material in the presence of at least one catalyst material. Additional reactors, and related methods of producing a solid carbon material, and of forming a reactor for producing a solid carbon material are also described.
Abstract:
The present disclosure relates to a power production system that is adapted to achieve high efficiency power production using partial oxidation of a solid or liquid fuel to form a partially oxidized stream that comprises a fuel gas. This fuel gas stream can be one or more of quenched, filtered, and cooled before being directed to a combustor of a power production system as the combustion fuel. The partially oxidized stream is combined with a compressed recycle CO2 stream and oxygen. The combustion stream is expanded across a turbine to produce power and passed through a recuperator heat exchanger. The expanded and cooled exhaust stream can be further processed to provide the recycle CO2 stream, which is compressed and passed through one or more recuperator heat exchangers in a manner useful to provide increased efficiency to the combined systems.
Abstract:
Systems and a method for forming carbon allotropes are described. An exemplary reactor system for the production of carbon allotropes includes a hybrid reactor configured to form carbon allotropes from a reactant gas mixture in a Bosch reaction. The hybrid reactor includes at least two distinct zones that perform different functions including reaction, attrition, catalyst separation, or gas separation.
Abstract:
The present invention relates to a method for preparing dimethyl ether from methanol which is carried out in a reaction device arranged with a plurality of catalyst bed layers connected in series, and comprises: dividing the reactant stream that contains methanol into n substreams, and feeding these different substreams into the reaction device through top feed ports or side feed ports between the catalyst bed layers of the reaction device for methanol-to-dimethyl ether reaction; wherein, the temperature T1 of the substream fed into the first catalyst bed layer is controlled within the following range: 290−50K1≦T1≦150K12−271K1+397.5; where, 1>K1≧0.5, and T1 is in unit of ° C.
Abstract:
An ethylbenzene dehydrogenation plant for producing styrene which comprises a reaction section in which one or more adiabatic reaction apparatuses are positioned in series, and a steam circuit in which there is at least one first steam heat exchange apparatus; said plant being characterized in that it comprises heating equipment in which there is a heating circuit by means of recirculation of the fumes formed during dehydrogenation processes of ethylbenzene to give styrene, wherein said heating equipment comprises the following apparatuses in fluid communication with each other by means of said heating circuit: one or more ultra-heating apparatuses, one or more combustion devices in which at least one steam diffuser, one burner and at least one mixing apparatus are inserted, one or more ventilation device(s).
Abstract:
The present disclosure relates to a method and apparatus for producing dimethyl ether by catalytic dehydration of methanol and by distillation of the dehydration product. The method is characterized in that the catalytic dehydration takes place in at least two reaction stages which are connected in series and of which at least the first reaction stage is operated adiabatically, wherein a cooling of the reaction products takes place at least between the first and the second reaction stages.
Abstract:
Apparatuses and methods for cooling catalyst are provided. In one embodiment, an apparatus for cooling catalyst includes a catalyst cooler vessel having a catalyst inlet for receiving catalyst. The apparatus includes a gas distributor lance positioned in the catalyst cooler vessel and having a gas outlet configured for injecting gas into the catalyst. The apparatus also includes a heat exchange tube positioned in the catalyst cooler vessel and having an outer surface. The heat exchange tube is configured to transfer heat from the catalyst to a heat exchange fluid. The apparatus further includes a hard surfacing material located on the outer surface of the heat exchange tube.
Abstract:
A device for producing ethoxylation derivatives includes an assistant circulation loop with lower starting quantity is added on the base of the main circulation loop, and the assistant circulation pump is started first when slight chain initial dose is added with low flow rate of the ethylene oxide and high growth rate of polyreation; when the amount of reactant gets to the starting quantity of the main circulation pump, the main circulation loop is started with high flow rate of ethylene oxide. The two circulation loops cooperate with each other shorten reaction time and high yield in one batch; a pre-reaction cavity with smaller inner diameter than that of the main body of the reactor is extended from the bottom of the main body of the device, so that lower chain initial dose can start the assistant circulation pump, and then start the assistant circulation loop.