A reactor system and a method for the production and/or treatment of particles in an oscillating process gas stream. The reactor system includes a reaction unit and a pulsation device. A pulsation that has a pulsation frequency and a pulsation pressure amplitude can be imposed on the process gas by means of the pulsation device. The pulsation device can adapt a pulation frequency and/or pulsation pressure amplitude of the pulsation to one of the inherent resonance frequencies of a resonator.

Compositions, methods, and reactors related to hydrogen production are generally described.

A mixing device for mixing at least two particulate materials has a first riser used for loading first particles and a second riser surrounding and being coaxial with the riser and used for loading second particles. The upper part of the first riser extending beyond the top of the second riser. At least a part of the upper part of the first riser and at least a part of the upper part of the second riser being located inside a mixing zone container, such that the first and second particles are delivered to the inside of the mixing zone container by means of the first and second risers respectively and mixed.

Bubble column reactor assemblies are provided, an assembly (100) comprising: a reactor vessel (102) comprising a bottom end and a top end. A pre-distributor plate (114) having a bottom surface and a top surface, disposed in the 5 reactor vessel (102) such that the bottom surface faces the bottom end of the reactor vessel (102). A gas distributor (106) is disposed below the pre-distributor plate (114) to receive and inject gas into a liquid prior to distribution of gas and liquid by the pre-distributor plate (114). The gas distributor (106) comprises: a common manifold (108) and a plurality of ring-shaped pipes disposed along a length of the 10 common manifold (108); and a plurality of nozzles disposed along an outer circumference of each ring-shaped pipe of the plurality of ring-shaped pipes to inject gas and create vortexes for uniform distribution of the gas in the liquid.

A process for maintaining an optimum polymerization process in a continuous loop polymerization reactor by driving a catalyst feed range set-point around a bad catalyst set-point range using a bad catalyst feed rate program to vary the catalyst feed rate for differing periods of time between previously determined good catalyst feed rates.

A device for mixing at least two granular materials has a first lifting tube used for loading first particles and a second lifting tube surrounding and coaxial to the first lifting tube and used for loading second particles. The upper part of said first lifting tube extends beyond the top of said second lifting tube, and at least part of the upper part of the first lifting tube and at least part of the upper part of the second lift tube are located inside a fast bed precipitator, allowing the first and second particles to be transported by means of the first and second lifting tubes to the interior of said fast bed precipitator and mixed.

The present specification relates to a method comprising: (A) mixing a ferrite-based catalyst molded article with diluent material particles; and (B) adding the mixture to a catalyst reactor, and a method for preparing butadiene using the same.

System and method for mixing a catalyst precursor into heavy oil using a high boiling hydrocarbon diluent to form a diluted precursor mixture, which is mixed with the heavy oil feedstock to form a conditioned feedstock, which is subsequently heated to decompose the precursor and form dispersed metal sulfide catalyst particles in situ. Because the high boiling hydrocarbon diluent is typically at a temperature above the decomposition temperature of the catalyst precursor, it is first feed through a cooler to reduce its temperature to avoid premature decomposition of the catalyst precursor. The high boiling hydrocarbon diluent may include a portion of the heavy oil feedstock, a portion of the conditioned feedstock, a vacuum tower bottoms product, or other high boiling hydrocarbon material having a boiling point higher than 524° C. A portion of the diluent may optionally include a medium boiling hydrocarbon material having a boiling point less than 524° C.

A method of installing a temperature measuring device inside a reactor tube while filling the tube with catalyst is provided. The method includes inserting a positioning system, including a single inflatable bladder connected at a central location to a centering ring, into a reactor tube, the reactor tube comprising a distal end and a proximal end. Then inserting the centering ring around the temperature measurement device. Then locating the positioning system at a first predetermined distance from the distal end, and inflating the single inflatable bladder, thereby centering the centering ring and the temperature measurement device within the SMR tube. Then introducing catalyst into the SMR tube, thereby enclosing the temperature measurement device in catalyst.

A device for centering a temperature measurement device inside a reactor tube that will be filled with catalyst, including multiple inflatable bladders mechanically and fluidically attached to a centering ring.