A system for continuously treating recycled polymeric material includes a hopper configured to feed the recycled polymeric material into the system. An extruder can turn the recycled polymeric material in a molten material. In some embodiments, the extruder uses thermal fluids, electric heaters, and/or a separate heater. The molten material is depolymerized in a reactor. In some embodiments, a catalyst is used to aid in depolymerizing the material. In certain embodiments, the catalyst is contained in a permeable container. The depolymerized molten material can then be cooled via a heat exchanger. In some embodiments, multiple reactors are used. In certain embodiments, these reactors are connected in series. In some embodiments, the reactor(s) contain removable static mixer(s) and/or removable annular inserts.

A process for dehydrogenating a paraffinic feedstock, producing olefins and/or dienes. The process includes feeding a paraffinic hydrocarbon feedstock comprising one or more C2+ paraffinic hydrocarbons and a fuel gas stream to a dehydrogenation reactor preheater, combusting the fuel gas stream in the dehydrogenation reactor preheater and heating the paraffinic hydrocarbon feedstock to a temperature in the range of 500-650? C., producing a heated paraffinic feedstock, feeding the heated paraffinic feedstock to a first dehydrogenation reactor operating in a reaction mode and containing an active dehydrogenation catalyst and at least one first electrical heating element, heating the heated paraffinic feedstock in the first dehydrogenation reactor using the at least one first electrical heating element, and contacting the heated paraffinic feedstock with the active dehydrogenation catalyst and the at least one electrical heating element thereby producing an olefinic product stream comprising one or more olefins.

Processes for producing polycrystalline silicon by thermal decomposition of silane are disclosed. The processes generally involve thermal decomposition of silane in a fluidized bed reactor operated at reaction conditions that result in a high rate of productivity relative to conventional production processes.

Processes for cracking ammonia are improved by using heat generated in a compression unit that is used to compress PSA off gas being recycled to a PSA unit to pre-heat liquid ammonia prior to vaporization and cracking. The heat is transferred using a heat transfer fluid such as an aqueous solution comprising from about 50 wt. % to about 60 wt. % of a glycol, e.g., ethylene glycol or propylene glycol.

The present invention provides an electrically heated apparatus (1), at least comprising: an electrically heated furnace (2) having a roof (2A) and walls defining a space (3); at least one tube (10) miming through the space (3), wherein the at least one tube (10) has an inlet (11) and an outlet (12) outside of the space (3); electrical radiative heating elements (20) located in the space (3), which heating elements (20) can heat the at least one tube (10); wherein the heating elements (20) suspend from the roof (2A) of the space (3); and wherein the roof (2A) of the space (3) has a shape configured to have heating elements (20) suspending at different heights.

Processes for producing n-heptane from a mixture of 1-hexene and 1-octene in the presence of a suitable isomerization-metathesis catalyst followed by a hydrogenation step are disclosed. Integrated manufacturing systems for producing n-heptane with minimal waste also are disclosed.

Assembly of a fluidized bed reactor for the preparation of polycrystalline silicon granules by chemical vapor deposition of silicon onto seed particles and removal of polycrystalline silicon granules is facilitated without breakage and with gas tightness by a specific assembly sequence.

The current disclosure is directed to a hydrogen-storage system that employs catalytic dehydrogenation of low-molecular-weight amines in a hydrogen reactor. The hydrogen-storage system comprises aliphatic amines and di-amines as organic carriers that store hydrogen covalently, a hydrogen reactor that releases and separates hydrogen gas from the carrier, and metal or metal-oxide catalysts that promote a dehydrogenation reaction to release hydrogen. In certain implementations, a metal or metal-oxide catalyst may be carried on high-surface-area support materials, such as gamma-alumina and metal-organic-framework materials, to enhance catalytic properties. The hydrogen reactor may be a packed-bed reactor, a monolith reactor, or a flow-through hydrogen-membrane reactor. In one implementation, the flow-through hydrogen-membrane reactor comprises an inlet through which the organic hydrogen carrier flows into the reactor, a hydrogen-separation membrane selectively permeable to hydrogen, a recirulation outlet for removing unspent organic carrier, and a hydrogen outlet for releasing hydrogen and reaction byproducts. The spent organic carrier are collected and hydrogenated to regenerate the original fuel.

A system for reactivating a catalyst having a predetermined heat content includes a reactor, a regenerator, and an electrically energized heater. The reactor is configured to generate a spent catalyst. The regenerator is configured to receive the spent catalyst from the reactor. The electrically energized heater has a plurality of energy emitting members at least partially immersed in the spent catalyst. The heater is configured to provide a supplemental heat content to obtain the predetermined heat content.

A catalytic synthesis method, a device and a system for ammonia synthesis through orderly regulation of the electronic domain of nitrogen are provided. Nitrogen and hydrogen are used as raw materials, and a multi-composition material with magnetic material as active site is used as a catalyst, thermal field, magnetic field and electric field or thermal field and electromagnetic field are applied to nitrogen, hydrogen and catalyst at the same time. The invention adopts the catalytic synthesis method, device and system for the mild ammonia synthesis at low temperature and low pressure conditions through orderly regulation of the electronic domain of nitrogen.