194 results about "Hydrogen combustion" patented technology

A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst system contains at least one solid acid component and at least one metal-based component which consists of (a) oxygen and/or sulfur and (b) a metal combination selected from the group consisting of: i) at least one metal from Group 3 and at least one metal from Groups 4-15 of the Periodic Table of the Elements; ii) at least one metal from Groups 5-15 of the Periodic Table of the Elements, and at least one metal from at least one of Groups 1, 2, and 4 of the Periodic Table of the Elements; iii) at least one metal from Groups 1 and 2, at least one metal from Group 3, and at least one metal from Groups 4-15 of the Periodic Table of the Elements; and iv) two or more metals from Groups 4-15 of the Periodic Table of the Elements, wherein the at least one of oxygen and sulfur is chemically bound both within and between the metals and, optionally, (3) at least one of at least one support, at least one filler and at least one binder. The process is such that the yield of hydrogen is less than the yield of hydrogen when contacting the hydrocarbons with the solid acid component alone. Further the emissions of NOx from the regeneration cycle of the catalyst system are reduced.

A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of one or more elements from Group 3 and one or more elements from Groups 4-15 of the Periodic Table of the Elements; and at least one of oxygen and sulfur, wherein the elements from Groups 3, Groups 4-15 and the at least one of oxygen and sulfur are chemically bound both within and between the groups and (3) at least one of at least one support, at least one filler and at least one binder. The process is such that the yield of hydrogen is less than the yield of hydrogen when contacting the hydrocarbons with the solid acid component alone.

Core-shell glass micro-spheres with a glass shell and a hollow or porous core for storing and releasing hydrogen fuel. The shell comprises a glass composition with a glass transition temperature (Tg) below 450° C. (preferably below 300° C. and most preferably below 200° C.) and a heat-absorbing materials, preferably comprising an infrared-absorbing ingredient. A combination of low Tg and the presence of an IR-absorbing material makes it possible to readily achieve a desired temperature T to reduce the shell tensile strength σ_t to an extent that a tensile stress a experienced by a shell of the micro-spheres meets the condition of a σ≧ασ_t for causing hydrogen to diffuse out of the micro-spheres. The released hydrogen can be fed into a fuel cell or hydrogen combustion engine. Here, α is a material-specific constant, typically in the range of 0.3 to 0.7.

The invention discloses a renewable energy generation and fresh water production integrated system for an isolated island. The renewable energy generation and fresh water production integrated system comprises solar cell panels, a wind driven generator, a seawater electrolytic tank, an oxygen storage tank, a hydrogen storage tank, an alkali filtering tank, a hydrogen combustion chamber, a seawater heating furnace, a turbine, a main shaft, a generator, a user, a heat exchanger, a pipeline, a small heat exchange pipe, pumps, a coastline, a condenser pipe and a water storage tank; electricity generation is carried out by utilizing randomly fluctuated solar energy and wind energy; hydrogen is generated by electrolyzing seawater, so that energy storage is realized; combustion is carried out by utilizing hydrogen; seawater is heated to generate superheated steam, so that the turbine is driven to rotate; then, the generator is driven to output the steady power; tail gas after hydrogen combustion and water vapour discharged by the turbine are introduced into seawater for condensation through the condenser pipe, so that fresh water is generated; seawater desalination is realized; energy is effectively utilized in a diversified manner; the problem that power and fresh water are stably supplied when the isolated island is offline can be solved; the heat exchanger heats seawater by utilizing waste water vapour; therefore, utilization of waste heat is realized; and the energy utilization efficiency is increased.

A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of one or more elements from Groups 1 and 2; one or more elements from Group 3; one or more elements from Groups 4-15 of the Periodic Table of the Elements; and at least one of oxygen and sulfur and (3) at least one of at least one support, at least one filler and at least one binder. The process is such that the yield of hydrogen is less than the yield of hydrogen when contacting the hydrocarbons with the solid acid component alone.

The invention relates to the technical field of aerosol tests in a containment, and specifically discloses a test system for measuring aerosol concentration and behavior under test conditions. The test system includes a test container, an aerosol generation system, a water temperature control system, a steam generation system, an aerosol measurement system and a hydrogen combustion system, whereinthe aerosol generation system, the water temperature control system, the steam generation system, the aerosol measurement system and the hydrogen combustion system are simultaneously connected with the test container. The test container is of a tube structure of which an interlayer is arranged on the side wall, and thetemperature in the test container is controlled through the water temperature control system. The aerosol generation system can generate aerosols and transport the aerosols to the test container. The steam generation system can provide saturated steam at a fixed temperature forthe test container. The hydrogen combustion system generates required expanded air flow for the test container by controlling hydrogen combustion. The test system for measuring the aerosol concentration and behavior under the test conditions can provide test simulation of a real aerosol environment as much as possible, and systematic and comprehensive test simulation study of the aerosol migrationbehavior in apassive containment of a third-generation nuclear power plant is convenient.

The invention relates to a hydrogen combustion heater. This heater includes (a) a passage for allowing hydrogen gas and air to flow therethrough; (b) a first catalyst provided in the passage, the first catalyst being heated, when electricity is applied thereto, thereby starting a first combustion of a first mixture of the hydrogen gas and the air in the first catalyst; and (c) a heat exchanger provided downstream of the first catalyst in the passage, the heat exchanger being adapted to transfer heat generated by the first combustion to a heating medium of the heat exchanger.

The molten metals is printed on the surface of ceramic, which is then carried out ceramic metallization in hydrogen combustion furnace by using wet hydrogen. Then, one layer of ceramics sintering auxiliary agent is coated on the metal ceramic plates sintered. Another ceramic plate with notch is covered on the said ceramic plate and agglutinated each other. Then, the sintering procedure is processed for agglutinated two ceramic plates in furnaces again. Nickel is plated on the electrode on the said notch of the ceramic plate. Fusion welding is carried out in the place, where nickel is plated, for leading out the wire for use in high temperature by using silver solder. Finally, the thermostat is connected to the wire for temperature control.

A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises: (1) at least one solid acid component, (2) at least one metal-based component comprised of (i) at least one of oxygen and sulfur (ii) one or more elements from Groups 5-15 of the Periodic Table of the Elements; and (iii) one or more elements from at least one of (a) Groups 1-2 and (b) Group 4; of the Periodic Table of the Elements; and (3) at least one of at least one support, at least one filler and at least one binder. The process is such that the yield of hydrogen is less than the yield of hydrogen when contacting the hydrocarbons with the solid acid component alone.

The method relates to a sewage water and sludge treatment technology, in particular to a process and equipment for treating municipal sewage water and sludge by utilizing a nepheline nucleated glass technology. The invention solves the problems that the prior incinerator has secondary pollution and upflowing black smoke, etc. in the process of treating the municipal sludge. The process comprises the following steps that: nepheline nucleated glass raw material is used to absorb and filter the sewage water, then sludge water is rapidly separated; upper-layer water is disinfected by steam, volatilizes odor and is further filtered to drinking water; underlayer slurry is mixed with diesel oil and olefin to be used as fuel of a liquation furnace; and residue falls on a hearth and is mixed with the added nepheline nucleated glass raw material to fuse superior nepheline nucleated glass particles, which can be used to produce nepheline nucleated glass and metal mixed powder metallurgical products, mechanical members and building materials. The equipment has a high energy formula of combining a superhigh temperature and bottom inserting-type three-phase electrode liquation furnace and nepheline and realizes the separation of hydrogen and oxygen in the water and the heat release of hydrogen combustion. The process and the equipment have no requirement on the water quality of incoming water, achieve the recovery of purified water and the emission of air without odor and realize the added value utilization of the residua.

In a membrane electrode assembly 1 of a fuel cell, the porosity of a hydrogen electrode-side catalyst layer 11a is made to be lower than that of an air electrode-side catalyst layer 11b. Specifically, the weight ratio of ion-exchange resin to carbon carriers of the hydrogen electrode-side catalyst layer is made to be larger than such ratio of the air electrode-side catalyst layer, the hydrogen electrode-side catalyst layer is allowed to contain an additive having a certain particle diameter or less, or the hydrogen electrode-side catalyst layer is formed by spraying a catalyst ink and the air electrode-side catalyst layer is formed by a transfer method. According to the present invention, the amount of hydrogen that permeates from the hydrogen electrode-side catalyst layer to the air electrode-side catalyst layer via an electrolyte membrane is reduced to suppress a direct hydrogen combustion reaction in the air electrode-side catalyst layer, thereby improving the fuel cell durability.

The invention discloses a hydrogen risk control system and a control method thereof for a small-power nuclear reactor containment. The hydrogen risk control system comprises a passive inert gas supply system and a steel containment system, wherein the steel containment system comprises a steel pressure-bearing containment; a passive hydrogen removing device is arranged inside the steel pressure-bearing containment; the passive inert gas supply system comprises an inert gas storage tank which communicates with the interior of the steel pressure-bearing containment; the steel pressure-bearing containment also communicates with an air-discharging system; moreover, the hydrogen risk control system also comprises a monitoring system for monitoring oxyhydrogen concentration in the containment. The system and method have the following advantages: a novel hydrogen control system design method applicable to a small-power nuclear reactor is provided by the invention; through injection of inert gas into a small steell containment of the small-power nuclear reactor and combination of the passive hydrogen removing device, gas mixture in the containment is ensured to remain a non-combustible state; thus, the risk of hydrogen combustion explosion is eliminated.

The present invention relates to a combustion nozzle for a whole hydrogen bell-type annealing furnace, and a waste hydrogen introduction and combustion method adopting the combustion nozzle. The combustion nozzle comprises a combustion chamber, an air distribution disk, a coal gas nozzle, an air duct, a coal gas flowing pipe and a dual-electrode. According to the present invention, the coal gas combustion and the waste hydrogen combustion are integrated in the same combustion nozzle; when the waste hydrogen is introduced, the coal is adopted as the ever-burning flame to ignite the waste hydrogen so as to ensure the safety and the stability of the waste hydrogen combustion; the air is divided into three levels in the air distribution disk to carry out mixing combustion, the coal gas is sprayed by adopting the uniform jet flow distribution on the end surface so as to accelerate the mixing speed of the coal gas, the waste hydrogen and the air, and ensure the stability of the combustion nozzle combusting and the reliability of the flame monitoring; with adopting the high-speed combustion nozzle to carry out the high-speed combustion for the waste hydrogen, the resources are recovered and utilized, the temperature uniformity of the furnace is ensured with the high-speed convective circulation of the flue gas.

The invention relates to a waste hydrogen combustion system for a full-hydrogen bell-type furnace used for bright annealing. The waste hydrogen combustion system comprises a main burner, a waste hydrogen burner and an auxiliary burner which are fixed on a shell, and a gas pipeline, a waste hydrogen pipeline and an air pipeline which are distributed on the shell, wherein the main burner is connected with the gas pipeline and the air pipeline; the waste hydrogen burner is connected with the waste hydrogen pipeline and the air pipeline; the auxiliary burner is connected with the gas pipeline andthe air pipeline; and the flame combustion direction of the waste hydrogen burner is tangent to the outer wall of an inner covered muffle and is not contacted with the outer wall of the inner coveredmuffle. The flame combustion direction of the waste hydrogen burner can ensure the best heat conduction efficiency and avoid damage or deformation caused by overhigh local temperature due to direct contact of flames and a muffle cover; the auxiliary burner has two electrodes, and when the ignition failure times is greater than a set value, a combustion chamber is needed to be blown, residual hydrogen is blown, and blast is prevented; and energy loss is reduced, the using amount of gas is reduced, and the environmental pollution is lightened.