46 results about "Catalytic heater" patented technology

The fuel cells (16, 18) adjacent or near the end plate (15) of a fuel cell stack (14) are warmed either by (a) a heater wire (48) within the fuel cell (16) adjacent to the end plate, (b) heater wires (53) are disposed in a heater element (52) located between the end plate and the fuel cell closest to the end plate (15), (c) one or more heaters (56) are disposed in holes (55) within the end plate (15), (d) electric heating elements (59) on a surface of the end plate (15), or (e) a catalytic heater (61) disposed on the surface of the end plate. The fuel cells (16, 18) may be heated before or during operation at sub-freezing temperatures to prevent loss of fuel cell performance, or may be heated after operation at sub-freezing temperatures to restore fuel cell performance.

A catalytic heating system comprising a main catalyst (20, 50) for flameless catalytic burning of fuel gas and a triggering system for initiating the catalytic burning, the triggering system comprising an electrical power source electrically connected to a metallic catalyst portion (104). As electric current flows through the metallic catalyst portion, it is in itself heated as an electric resistance heater to a temperature necessary for triggering the catalytic burning. By using electrical current for direct heating of a catalyst portion, reaction starts as soon as the resistance heating achieves the temperature for initiating the catalytic reaction. As soon as the reaction starts, it is transferred to the main catalyst.

A portable catalytic combustion heater, wherein fuel vapor (11) and air (10) are supplied to a catalyst (6) which promotes the flameless combustion of fuel and releases that. The fuel is supplied as a liquid, passes through a selectively permeable membrane (8) such as fuel vapor exits the membrane and is fed to the catalyst (6). Additional features include porous supports and means of enhancing and diminishing the catalytic rate of combustion and controlling the heat output.

The present invention has to do with an apparatus for generating a three dimension heating gradient field for curing powder coated wood products. The three dimension heating gradient field is generated with catalytic heater panels having independently adjustable angles and adjustable heat outputs.

A gas powered heat delivery system, comprising a fuel gas supply, a catalytic heater connected to the fuel gas supply; a tank containing fluid, the tank being disposed to receive heat from the catalytic heater; a one way conduit having an inlet for receiving fluid from the tank, an outlet for delivering fluid to the tank, and a heat delivery section; a rolling diaphragm pump connected to the one way conduit for pumping heated fluid through the one way conduit from inlet to outlet, the rolling diaphragm pump being connected to the fuel gas supply to operate the rolling diaphragm pump; and a switch for switching the fuel gas supply between the rolling diaphragm pump and the catalytic heater, the switch being operated by the rolling diaphragm pump. Propane may be used as the fuel gas. Glycol may be used as the heating fluid. The gas powered heat delivery system may be used to heat oilfield equipment, for example at a well site, or items in other environments, particularly where vapors pose an explosion hazard.

Auxiliary heating systems that can supply heat to a hydrogen storage material, which may comprise at least one hydridable material, located inside a hydrogen storage tank have been developed. These auxiliary heating systems involve the catalytic combustion of hydrogen and oxygen in a catalytic heater to produce heat and combustion products. The heat produced from the catalytic combustion may then be transferred, either indirectly or directly, to the hydrogen storage material to stimulate the release of additional desorbable hydrogen that may be stored in the at least one hydrdidable material.

The invention relates to a type of fuel cell, especially a polymer-electrolyte-fuel cell. According to this invention, the fuel cell is provided with a heater (3) based on catalytic reaction heat for quickly and uniformly heating the fuel cell. This is carried out only in case of the temperature being obviously higher than the ambient temperature or it is helpful to the fuel cell allowing occurrence of electrochemical reation.

A catalytic tank heater includes a removably attached catalytic heater cartridge having catalytic material. The heater is attached to an LPG tank to position the catalytic heater cartridge to face the tank. The catalytic heater cartridge covers a plenum chamber of the catalytic tank heater. A fuel distribution header and heating element are positioned within the plenum chamber and are controlled to initiate combustion of the catalytic material to heat the tank. Vapor from the tank is provided as fuel to the catalytic tank heater, and is regulated to increase heat output as tank pressure drops. The catalytic heater cartridge can be replaced with a new cartridge while at the location of the tank on a property.

A method and fuel composition for pre-heating and/or operating a catalytic heater is described herein. In one aspect, there is provided a method of preheating a catalyst in a catalytic heater comprising the steps of: providing a preheat composition comprising greater than 60% by volume hydrogen and at least one fluid component selected from natural gas, propane, butane, refinery off gas, ethylene off gas, methanol, ethanol, butanol, liquefied biogas and mixtures thereof; and contacting the catalyst with the preheat composition for a period of time sufficient to raise the temperature of the catalyst to a one or more temperatures. In this or other embodiments, there is a fuel composition that comprises at least one component selected from natural gas, propane, butane and mixtures thereof and optionally hydrogen.

Methods and apparatus for controlling fecal odors in an enclosed space, such as a pit latrine, include providing an oxidizer, such as a catalytic heater and an optional mechanical ventilation unit, such as an inline fan, both flow connected to a vault (pit) of the latrine. The heater is also connected to a source of fuel, for example, propane. Fresh air is drawn through vents in the latrine housing and thereafter through toilets in the latrine and through the vault, providing oxygen for the reaction. The fan and/or oxidation process draws both fresh air and accompanying odorous compounds directly from the latrine and into the oxidizer wherein the odorous components are substantially destroyed.

The invention provides a heat supply device based on methanol catalyst heating. The heat supply device is characterized by comprising a heat exchange tube, the center of the heat exchange tube is provided with a heating pipe, a heat exchange cavity is formed between the outer walls of the heating pipe and the heat exchange tube, the upper and lower two ends of the heat exchange cavity are providedwith heat exchange mouths correspondingly, a heat exchange medium is in and out from the heat exchange mouths to perform heat exchange with the heat exchange cavity, the heating pipe is internally provided with a plurality of layers of catalytic cakes and heat storage cakes in a stacked manner, the end faces of the catalytic cakes and the heat storage cakes are provided with a plurality of ventilation holes, and the catalytic cakes and the heat storage cakes are distributed at intervals in a laminated manner, the bottom of the heat exchange tube is connected with an air fan and a methanol spray head, the methanol spray head emits atomized methanol to be blown into the heat exchange tube to contact with the catalytic cakes along with air flow, and the methanol and the catalytic cakes perform chemical reaction inside the heat exchange tube to generate heat for the heat storage cakes and the heat exchange tube. The heat supply device based on the methanol catalyst heating has the beneficial effects that in the heat supply device, a methanol catalytic heater is a flameless heating device, a generated exhaust gas after the catalytic reaction is only carbon dioxide, and the heat supplydevice based on the methanol catalyst heating is reliable to use, safe and free of pollution.

The invention discloses a combined heat and power system based on a reforming hydrogen production device and fuel cells. The system comprises the reforming hydrogen production device and the fuel cellstack; a reformed gas is conveyed to a heat supply heat exchanger; the heat supply heat exchanger provides heat for the outside; the electric energy of the fuel cell stack is outputted through an electric energy converter; a reforming electric heater and a reforming heat exchanger are arranged in the reforming hydrogen production device; the reforming electric heater is connected with the electric energy converter; electric power required for starting the reforming hydrogen production device and the fuel cell stack is provided by an external electric power source; the reforming electric heater provides heat energy for the hydrogen production of the reforming hydrogen production device; and tail gas outputted by the fuel cell stack is conveyed into a catalytic heater or conveyed into a carbon catcher provided with a compressor. The system of the invention has the advantages of high power generation efficiency, high energy utilization rate and low emission of nitrogen oxide and carbon oxide.