A method of preheating a feed to a molten material reactor comprises heating a hydrocarbon feed in a first heat exchanger using a cooled product gas to produce a heated hydrocarbon feed stream, pyrolyzing at least a portion of the C.sub.2+ hydrocarbons in the heated feed stream in a pyrolysis reactor to produce a pyrolyzed hydrocarbon stream, and heating the pyrolyzed hydrocarbon stream in a second heat exchanger using a product gas to produce a pre-heated feed gas. The heated hydrocarbon feed stream comprises methane and one or more C.sub.2+ hydrocarbons.

The present invention relates to an automated radiosynthesis device adapted for the addition of multiple additional components. The automated radiosynthesis device of the invention enables a wider range of radiochemical synthetic processes to be carried out in an automated fashion.

A reductant insertion system for an after treatment system configured to decompose constituents of an exhaust gas, includes: a dry reductant tank configured to contain a dry reductant; a reductant delivery line configured to operatively couple the dry reductant tank to the after treatment system for delivery of the dry reductant to the after treatment system; and a pressurized gas source configured to communicate the dry reductant to the after treatment system through the reductant delivery line using pressurized gas.

PROBLEM TO BE SOLVED:

In an apparatus for synthesizing methane from carbon dioxide and hydrogen, a device which is capable to remove the reaction heat and lower the reaction temperature as the reaction progresses in order to increase the conversion ratio to methane has been desired.

SOLUTION:

In the present invention, powders of magnesium hydroxide and magnesium carbonate, which are chemical heat storage agents, are used as part of the fluidizing medium of the multi-stage fluidized bed in the temperature range where the methanation reaction proceeds. The heat generated during the methanation reaction can be absorbed and stored in the powder. At this time, carbon dioxide generated from magnesium carbonate can be used as a raw material gas for the methanation reaction. Furthermore, after discharging the magnesium oxide generated by endotherm, the powder can be regenerated with an external regenerating facility and then the storage heat can be released and recovered. The regenerated powder can be fed to the uppermost stage of the multi-stage fluidized bed at a temperature lower than the internal temperature of the reactor to lower inside temperature. This made it possible to lower the reaction temperature of ascending reaction gas in the reactor along with the reaction progress, and to increase the conversion ratio to the produced methane by this lowered temperature.

The present invention provides a highly effective method of continuous reactions in a heat exchanger reactor using a flexible turbulator (2). The flexible turbulator (2) present in the tube of the reactor assembly provides efficient mixing and reaction of the reactants in the reactor. The tube and shell assembly provides better heat transfer by transfer of heat through the temperature gradient across the tube (3) wall. The shell fluid (8) can be cold or hot as required depending on whether the reaction is exothermic or endothermic. The reactants are passed through the inlet (6) and allowed to mix and react in the tube (3), the mixing and reaction is facilitated by flexible turbulator and the final product is received through the outlet. The process can be repeated to achieve desired final product. Progress of the reaction is measured by thermal sensors present inside the reactor. The data is processed through a highly specialized computer software and output about progress of reaction is monitored.

An apparatus for preparing polyalpha-olefins includes a mixing unit, a microchannel reaction unit, a high-pressure separation unit, a low-pressure separation unit, a gas circulation unit, a post-treatment unit and a pressure control unit, the mixing unit, the microchannel reaction unit, the high-pressure separation unit, the low-pressure separation unit that are successively connected. The gas circulation unit, the microchannel reaction unit is provided with the BF.sub.3 gas inlet, the mixing unit is provided with the auxiliary feed inlet, and the olefin raw material inlet, the gas circulation unit is connected with the BF.sub.3 gas inlet, the low-pressure separation unit is further connected with the post-treatment unit, and the high-pressure separation unit, the pressure control unit, and the gas circulation unit are further successively connected. The apparatus has the advantages of high polymerization reaction speed, high reaction conversion and good product selectivity, and is suitable for large-scale industrial production.

Processes and apparatus for reforming hydrocarbons to reduce the impact of contaminants created by non-catalyst coking. The reaction zone receives sulfur to inhibit the impact, and a control index is used to control the determine conditions with generally lower pressures. Additionally, a compression zone, pressure control zone and combustion zone operation are provided for the operation of the reaction zone at the generally lower pressures.

The present invention relates to a post-processing apparatus configured to post-process latex, the post-processing apparatus including: a receiving tank having therein a receiving part and having an inlet port through which the latex is introduced into the receiving part and a discharge port through which the latex is discharged; an ultrasonic wave generating device configured to generate ultrasonic waves to the latex accommodated in the receiving tank; a pressure reducing part configured to reduce a pressure of the receiving part of the receiving tank to discharge an unreacted monomer to the outside of the receiving tank; and a partition part provided in the receiving part of the receiving tank and comprising a plurality of partitions disposed in a direction from the inlet port toward the discharge port of the receiving tank, in which the latex accommodated in the receiving part moves along upper and lower sides of the plurality of partitions.

The present disclosure provides an opening-closing type microwave catalytic reaction apparatus, including a microwave system, a microwave cavity, a protective cover, a cooling system, and a vertical furnace tube, where two ends of the furnace tube are respectively stretched out of the microwave cavity, the microwave system includes a plurality of microwave transmitting units, and the microwave transmitting unit includes a microwave transmitter; the furnace tube is provided with a gas inlet on a top and a gas outlet on a bottom; a compression hinge and a cavity cover capable of being opened or closed are arranged on the microwave cavity, a convex edge plate is disposed at an edge of the cavity cover, the compression hinge can compress the cavity cover such that the convex edge plate is tightly attached to a concave edge plate on the microwave cavity, and the protective cover can cover the entire cavity cover.

A device for rapidly preparing β-Si3N4 by gas-solid reaction and a method thereof, and relates to the technical field of recycling and reuse of waste fine silicon powder. The bottom of a stock bin communicates with a first opening and closing passage, a first connection passage, and the top of a first transitional bin; the bottom of the first transitional bin communicates with the first opening and closing passage, a second connection passage, and the top of a reaction bin; the bottom of the reaction bin communicates with a second opening and closing passage, the first connection passage, and the top of a second transitional bin; the bottom of the second transitional bin communicates with the top of a conveying passage through the first opening and closing passage; a material outlet of the conveying bin communicates with the collection bin.