The invention relates to a catalyst for the thermal decomposition of ammonia. The catalyst comprises at least 25% by weight of nickel oxide and is present in powder form and/or comprises from 30% to 42% by weight of nickel oxide. Also disclosed is a process for the thermal decomposition of ammonia into hydrogen and nitrogen, which process comprises contacting ammonia with the catalyst of the invention.

Provided herein are methods, devices and systems for processing of carbonaceous compositions. The processing may include the manufacture (or synthesis) of oxidized forms of carbonaceous compositions and/or the manufacture (or synthesis) of reduced forms of oxidized carbonaceous compositions. Some embodiments provide methods, devices and systems for the manufacture (or synthesis) of graphite oxide from graphite and/or for the manufacture (or synthesis) of reduced graphite oxide from graphite oxide.

Provided herein are methods, devices and systems for processing of carbonaceous compositions. The processing may include the manufacture (or synthesis) of oxidized forms of carbonaceous compositions and/or the manufacture (or synthesis) of reduced forms of oxidized carbonaceous compositions. Some embodiments provide methods, devices and systems for the manufacture (or synthesis) of graphite oxide from graphite and/or for the manufacture (or synthesis) of reduced graphite oxide from graphite oxide.

A gas-particle processing method comprising: introducing gas into a chamber through a gas inlet; flowing the gas through the chamber from the gas inlet to the gas outlet at a first controlled mass flowrate; introducing at least one particle stream into the chamber through one or more particle inlets of the chamber at a second controlled mass flowrate; flowing each particle stream through a respective processing region in the chamber; and controlling the first and/or second mass flowrates, such that the gas-particle mixture porosity in a substantial portion of each processing region is 0.900-0.995.

A method for installing a monitoring device with the simultaneous loading of a particulate catalyst into a vertical catalyst tube includes (i) introducing a monitoring device into the tube, (ii) introducing monitoring device alignment apparatus into the tube, (iii) introducing catalyst loading apparatus into the tube, (iv) loading catalyst particles into the top of the tube whereinafter they contact said catalyst loading apparatus as they pass down the tube, forming a uniform bed of catalyst beneath said catalyst loading apparatus and alignment apparatus and around said monitoring device, and (v) simultaneously removing the catalyst loading apparatus and alignment apparatus from the catalyst tube in timed relationship to the catalyst loading. The monitoring device alignment apparatus includes a ring member and two or more spacing members affixed to the ring member such that the ring member and the monitoring device are centrally positioned within the tube.

A system and method for discharging a transfer slurry from a first polymerization reactor through a transfer line to a second polymerization reactor, the transfer slurry including at least diluent and a first polyethylene. A product slurry is discharged from the second polymerization reactor, the product slurry including at least diluent, the first polyethylene, and a second polyethylene. The velocity, pressure drop, or pressure loss due to friction in the transfer line is determined, and a process variable adjusted in response to the velocity, pressure drop, or pressure loss not satisfying a specified value.

A system and method for discharging a transfer slurry from a first polymerization reactor through a transfer line to a second polymerization reactor, the transfer slurry including at least diluent and a first polyethylene. A product slurry is discharged from the second polymerization reactor, the product slurry including at least diluent, the first polyethylene, and a second polyethylene. The velocity, pressure drop, or pressure loss due to friction in the transfer line is determined, and a process variable adjusted in response to the velocity, pressure drop, or pressure loss not satisfying a specified value.

A system and method for discharging a transfer slurry from a first polymerization reactor through a transfer line to a second polymerization reactor, the transfer slurry including at least diluent and a first polyethylene. A product slurry is discharged from the second polymerization reactor, the product slurry including at least diluent, the first polyethylene, and a second polyethylene. The velocity, pressure drop, or pressure loss due to friction in the transfer line is determined, and a process variable adjusted in response to the velocity, pressure drop, or pressure loss not satisfying a specified value.

The present invention is applied in the field of heat exchange and temperature regulation and, more specifically, relates to an outer cooling assembly for structures with inner refractory lining, the outer cooling assembly comprising: a distributor arranged on the outer side and around an upper section of a structure with inner refractory lining; and a collector arranged below the distributor and on the outer side and around a lower section of a structure with inner refractory lining; wherein the distributor comprises a fixing plate and cooling fluid injection members arranged on the outer side and around the fixing plate and configured to eject cooling fluid onto the outer surface of the structure.