12results about "Calcination" patented technology

The present invention relates to catalysts for producing hydrogen and / or synthesis gas and methods for obtaining the same. More specifically, the present invention describes nickel, molybdenum, and tungsten-based catalysts for the steam reforming process of natural gas or other hydrocarbon streams (refinery gas, propane, butane, naphtha, or any mixture thereof), which exhibit high resistance to deactivation by coke deposition. According to the present invention, the catalyst has NiMoW as its active phase, in bulk form and / or supported on alumina oxide and other high surface area oxide supports, and may contain other promoters. Furthermore, the present invention teaches the preparation of catalysts in which the NiMoW active phase has high activity for the steam reforming reaction of hydrocarbons.

Embodiments herein relate to a system 100 that for example may be used for calcination of lime mud. The system may comprise an input 102, a media separated heat exchanger 104, an injection arrangement 106, an electrically heated calcination reactor 108, configured to convert input material received by means of said injection arrangement 106 into calcination process products comprising a solid compound in the form of calcium oxide and a gas in the form of carbon dioxide, a heat recovery arrangement 116 configured to receive said calcination process products, to extract heat from said calcination process products and transfer said extracted heat to said input material in said media separated heat exchanger 104 and one or more separators 112, 118 configured to separate said solid compound in the form of calcium oxide and gas in the form of carbon dioxide. Different parts of the system 100 are exemplified in embodiments herein.

There is provided a cyclone reactor design, wherein the reactor comprises an upper part with a first smaller diameter (D1) and a first height (L2), a middle part with a second diameter (D2), and a lower part with a third smaller diameter (D3) and a third height (L4), wherein the directions upper, middle and lower are in relation to the direction of gravity force, wherein the second diameter (D2) is at least 1.25 times larger than the first smaller diameter (D1) and wherein the second diameter (D2) is at least 1.25 times larger than the third smaller diameter (D3), wherein the angles α1 and α2 are in the interval 20°-65°, and wherein the reactor comprises at least one plasma torch, at least one inlet and at least one outlet. Advantages include that the reactor has efficient energy transfer to particles and allows for a compact design.

The present disclosure relates to the technical field of lithium batteries. Provided in the present disclosure are a roasting furnace, a system for preparing a lithium battery oxide precursor, and a lithium battery material precursor and a preparation method therefor and the use thereof. By means of atomization feeding at the bottom of the roasting furnace, after a reaction is conducted in the roasting furnace from bottom to top, a product is output from a particle outlet in the top via negative pressure at the top of the furnace. Since a gas carries the product out from the top of the furnace, the present disclosure, compared with a device that discharges materials from the bottom thereof, achieves long residence time at a pyrolysis temperature, which is beneficial for improving the crystallinity of the product, and the particles are output from the top of the furnace along with the gas, such that the blockage of an atomizer due to the flowing of the particles can be prevented, and the operation stability of the device is improved. In addition, the roasting furnace provided by the present disclosure can further adjust the residence time by adjusting and controlling the negative pressure; and compared with traditional feeding and discharging modes, the temperature of a lower area in the roasting furnace is easier to control, and accurate temperature control, energy conservation and consumption reduction are facilitated.

A circulating fluidized bed (CFB) furnace (3) for heating and / or calcination of a material, wherein a hydrogen-enriched gas mixture (1) is used as fuel for the calcination process is disclosed. A process for calcination of a material, wherein a hydrogen-enriched gas mixture (1) is used as fuel for the calcination process is further disclosed.

A process for producing a porous alpha-alumina catalyst support, comprising i) preparing a precursor material; ii) forming the precursor material into shaped bodies; and iii) calcining the shaped bodies to obtain the porous alpha-alumina catalyst support. The catalyst support has a high overall pore volume, thus allowing for impregnation with a high amount of silver, while keeping its surface area sufficiently large so as to provide optimal dispersion of catalytically active species. The invention further relates to a shaped catalyst body for producing ethylene oxide by gas-phase oxidation of ethylene. Also described is a process for preparing a shaped catalyst body as described above comprising impregnating a porous alpha-alumina catalyst support obtained in the process described above with a silver impregnation solution; and b) subjecting the impregnated porous alpha-alumina support to a heat treatment.

The present disclosure relates to a process for converting saturated polyethylene to at least alkene products. The process includes contacting saturated polyethylene with three or more catalyst components in a reactor, the reactor containing an alkene reactant. The three or more catalyst components include a metathesis catalyst component, an isomerization catalyst component, and a dehydrogenation catalyst component. By the contacting, at least a portion of the saturated polyethylene undergoes a dehydrogenation reaction to form unsaturated polyethylene, and at least a portion of the unsaturated polyethylene or a product derived therefrom undergoes a metathesis reaction and an isomerization reaction to produce an effluent containing at least alkene products.

Embodiments herein relate to a heat recovery arrangement for heat recovery in a system 100 for calcination of lime mud. The heat recovery arrangement comprises: an inlet 402 for receiving incoming gas preheated by excess heat generated by the system 100; an expander 404 for expanding and thereby cooling by expansion said incoming preheated gas; a heat recovery tube 406 arranged in a container 408 comprising quick lime extracted from the system 100, into which recovery tube 410 said expanded and cooled gas is led and heated by the heat from the quick lime; a compressor 412 for compressing and further heating said preheated gas; and an outlet 414 from which said compressed and further heated gas is led out and thereafter decompressed by a diffusor 418 and reentered into the system 100, whereby heat generated from the calcination process is reused.