The invention relates to a multitubular reactor for dehydrogenation of liquid phase alcohol dehydrogenation and a method of liquid phase alcohol dehydrogenation. Most of the alcohol dehydrogenation reaction is endothermic reaction, the reaction temperature is high and the equilibrium conversion rate is low.

Disclosed is a combined reformer including two or more catalyst tubes reacting at different temperatures, having different reforming reactions continuously performed as a combustion gas sequentially supplies heat to two or more catalyst tubes, and capable of easily replacing a catalyst, and a catalyst replacement method thereof.

Disclosed is a technology based upon the nesting of tubes to provide chemical reactors or chemical reactors with built in heat exchanger. As a chemical reactor, the technology provides the ability to manage the temperature within a process flow for improved performance, control the location of reactions for corrosion control, or implement multiple process steps within the same piece of equipment. As a chemical reactor with built in heat exchanger, the technology can provide large surface areas per unit volume and large heat transfer coefficients. The technology can recover the thermal energy from the product flow to heat the reactant flow to the reactant temperature, significantly reducing the energy needs for accomplishment of a process.

A fuel reforming device includes a combustion part including a burner; an exhaust part configured to circulate an exhaust gas that is generated from the combustion part; and a reactor that is configured to generate hydrogen from a raw material by absorbing heat from the exhaust gas circulating in the exhaust part. The reactor includes a heat storage member that is configured to absorb the heat from the exhaust gas during operation of the combustion part, store the absorbed heat, and provide the absorbed heat to the reactor.

Disclosed is a technology based upon the nesting of tubes to provide chemical reactors or chemical reactors with built in heat exchanger. As a chemical reactor, the technology provides the ability to manage the temperature within a process flow for improved performance, control the location of reactions for corrosion control, or implement multiple process steps within the same piece of equipment. As a chemical reactor with built in heat exchanger, the technology can provide large surface areas per unit volume and large heat transfer coefficients. The technology can recover the thermal energy from the product flow to heat the reactant flow to the reactant temperature, significantly reducing the energy needs for accomplishment of a process.

Disclosed is a technology based upon the nesting of tubes to provide chemical reactors or chemical reactors with built in heat exchanger. As a chemical reactor, the technology provides the ability to manage the temperature within a process flow for improved performance, control the location of reactions for corrosion control, or implement multiple process steps within the same piece of equipment. As a chemical reactor with built in heat exchanger, the technology can provide large surface areas per unit volume and large heat transfer coefficients. The technology can recover the thermal energy from the product flow to heat the reactant flow to the reactant temperature, significantly reducing the energy needs for accomplishment of a process.

A process for steam or dry reforming of hydrocarbons in a reforming reactor, comprising the steps of: (a) passing a feedstock, comprising one or more hydrocarbons together with steam and/or CO.sub.2, through a first catalytic zone at an elevated temperature, to form a partly reformed process gas, wherein the first catalytic zone comprises one or more elongate conduits, each containing reforming catalyst; and (b) passing the partly reformed process gas through a second catalytic zone at an elevated temperature, so as to form a reformed gas stream, wherein the second catalytic zone comprises one or more elongate conduits, each containing reforming catalyst; wherein the process further comprises the combustion of a fluid fuel with a combustion-sustaining medium in an exothermic combustion region, to form a hot combustion products stream, wherein the exothermic combustion region is adjacent to and laterally surrounds each of the second catalytic zone elongate conduits.

Disclosed is a technology based upon the nesting of tubes to provide chemical reactors or chemical reactors with built in heat exchanger. As a chemical reactor, the technology provides the ability to manage the temperature within a process flow for improved performance, control the location of reactions for corrosion control, or implement multiple process steps within the same piece of equipment. As a chemical reactor with built in heat exchanger, the technology can provide large surface areas per unit volume and large heat transfer coefficients. The technology can recover the thermal energy from the product flow to heat the reactant flow to the reactant temperature, significantly reducing the energy needs for accomplishment of a process.

The invention relates to a multitubular reactor for dehydrogenation of liquid phase alcohol dehydrogenation and a method of liquid phase alcohol dehydrogenation. Most of the alcohol dehydrogenation reaction is endothermic reaction, the reaction temperature is high and the equilibrium conversion rate is low.

A dielectric barrier discharge plasma reactor and method in which plasma is used to activate difficult-to-activate molecules and the catalyst so that chemical conversion of the activated molecules can occur at reduced temperature and pressure conditions to carry out chemical reactions that ordinarily occur at high temperature and high pressure conditions or otherwise do not occur at all. The dielectric barrier discharge plasma reactor includes a tubular outer ground electrode having an inner surface bounding an interior volume therein, a dielectric electrode coaxially mounted in the interior volume of the tubular outer ground electrode, the dielectric electrode comprising a central electrode in a cylindrical dielectric element, the cylindrical dielectric element having an outer surface in spaced relationship to the inner surface of the tubular outer ground electrode to define an annular fluid flow passage therebetween, and a catalyst material comprising catalyst coated on the inner surface of the tubular outer ground electrode and optionally further comprising catalyst in a catalyst bed in the annular fluid flow passage.