JPS58140305A - Hydrocarbon fuel reformer - Google Patents

Abstract

PURPOSE:To obtain a fuel reformer with high reactivity by placing a carrier made of a heat resistant inorg. material behind a reforming catalyst and supporting a CO converting catalyst on the carrier to reduce a pressure drop of an inorg. gas before and behind the CO converting catalyst. CONSTITUTION:Hydrocarbon is fed from a feeding pipe 5 to a path 4 in a reaction tube 3, water and air are fed from a feeding pipe 7 to a path 6, and they are preheated with a heater 11. The materials evaporated by the preheating are mixed among inorg. fibers 10 and reformed into an inorg. gas consisting essentially of H2, CO2 and CO through a reforming catalyst 8. The reformed gas passes through heat resistant inorg. fibers 10' and enters a Co converting catalyst 9 to convert the CO into CO2. The carrier of the catalyst 9 is formed with a molded body composed of multilayered thin walls and having a lattice or honeycomb cross-section so as to reduce a pressure drop and to stably operate the reformer. The converted inorg. gas consisting essentially of H2 and CO2 is cooled in a cooling pipe 13 attached to a gas feeding pipe 12, and it is fed to a vapor- liq. separator 14 to separate the produced gas from water.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydrocarbon fuel reformer that mixes hydrocarbons with water or air and passes the mixture through a reflow pink catalyst to reform it into an inorganic gas mainly consisting of hydrogen and carbon dioxide. be.

In general, a hydrocarbon fuel reformer mixes various hydrocarbons with water or air as a gasifying agent, and then converts the mixture into mainly hydrogen (H2), carbon dioxide gas (02), and carbon oxide (CO) using a reflow pink catalyst. However, among these inorganic gases, carbon oxide is highly toxic, so a shift reaction (CO + H20 → CO2 + Hz'
) to convert it into carbon dioxide gas. Therefore, conventionally alumina was used.

A support made of inorganic heat-resistant materials such as cordierite and mullite, all molded into pellets, and iron and chromium.

A metal such as white metal was supported as a CO conversion catalyst and provided at the rear of the reflow pink catalyst body.

However, when the pellet-shaped CO shift catalyst is provided at the rear of the reflow pink catalyst, the pressure loss before and after the CO shift catalyst becomes high, and there are disadvantages in that sufficient reactivity cannot be obtained.

In the present invention, γ-alumina is added to the rear part of the reflow pink catalyst body.
A heat-resistant inorganic material such as cordierite or mullite is provided with a support made of multi-layered thin walls with a honeycomb or lattice cross section, and a CO conversion catalyst is supported on this support to reform hydrocarbon fuels. By configuring the device, the above-mentioned conventional drawbacks are solved.

An embodiment of the present invention will be described below based on the drawings.

The figure shows a side sectional view of a hydrocarbon fuel reformer. This hydrocarbon fuel reformer consists of an outer tube 1°, an inner tube 2, and a reaction tube 3 made of heat-resistant inorganic ceramic, which are installed in this order from the outside. , consisting of triple pipes, 4 is a passage provided between the outer pipe 1 and the middle pipe 2, and natural gas,
A hydrocarbon supply pipe 5 is connected to supply hydrocarbons such as methane gas, propane gas, or kerosene or light oil that has been heated in advance with a heater (not shown) to become gaseous. 6 is a passage B provided between the middle tube 2 and the reaction tube 3;
are connected. 8 is a reforming catalyst provided in the reaction tube 3, and the reforming catalyst 8 of C is γ.
- An integrally molded body made of alumina and consisting of multilayer thin walls with a lattice-like cross section is used as a carrier, and 10% by weight of nickel as a catalyst is supported on this carrier. Reference numeral 9 denotes a COO forming catalyst located at the rear of the reforming catalyst 8 and provided inside the reaction tube 3;
Similarly, it is made of γ-aluminum and has iron and chromium each supported in a quintuple fluorescing percentage on an integrally molded support consisting of multi-layered thin walls with a lattice-like cross section. 10.10
' is a heat-resistant inorganic fiber such as quartz wool filled between the passageway 4, the passageway B6, and the reforming catalyst body 8 and the Co modification catalyst body 9.

11 is a heater provided in the reaction tube 3, and a reforming catalyst body 8. CO shift catalyst body 9 and passageway 4° passageway B6'
(H heating is performed. Reference numeral 12 is an air supply pipe connected to the rear of the reaction tube 3. Inorganic gases mainly composed of hydrogen gas and carbon dioxide produced as a result of metamorphosis are taken out from this air supply pipe 12, The generated inorganic gas is cooled in the provided cooling pipe 13, and separated into condensed liquid and produced gas in the gas/liquid separator 14. 15 is a lid provided at the opening of the outer tube 1. This lid 15 can be removed by removing bolts 16, and the deteriorated reforming catalyst 8 can be replaced.

Next, the operation of this embodiment will be explained.

After the reaction tube 3i is previously heated to a reaction temperature of 700 to 900° C. by the heater 11, hydrocarbons are supplied into the passageway 4 from the hydrocarbon supply tube 6. The hydrocarbons supplied into the passageway 4 are preheated by the heater 11 while passing through the heat-resistant inorganic fibers 10. - Water or air is supplied from the power water/air supply pipe 7 into the passage B6 and is preheated by the heater 11. The preheated and evaporated water vapor or air and hydrocarbons are thoroughly mixed while passing through a heat-resistant inorganic fiber 1o such as quartz wool,
When the gas passes through the reforming catalyst body 8 heated by the heater 11, it is reformed into inorganic gases mainly consisting of hydrogen gas, carbon dioxide gas, and carbon oxide gas by a reforming reaction. The reformed inorganic gas is supplied to the Co modification catalyst body 9 through the heat-resistant inorganic fibers 10', and while passing through the Co modification catalyst body 9, carbon monoxide is converted to carbon dioxide gas. Therefore, the inorganic gas that has passed through the Co shift catalyst body 9 becomes a gas mainly consisting of hydrogen gas and carbon dioxide gas, and is cooled by the cooling pipe 13 provided in the j-trachea 12. Excess water is condensed in this cooling pipe 13 and separated into produced gas and water in a gas-liquid separator 14. The separated generated gas is then stored in a gas reservoir (not shown) and used as needed.As shown above, the carrier of the Co conversion catalyst body 9 is made of a multilayer thin wall with a lattice-like cross section. It is composed of an integrally molded body made of
By supporting metamorphic catalysis, space velocity (V, 5) 6
As a result of a reforming experiment of hydrocarbon fuel under the condition of 00'VH, it was found that the conventional pellet-shaped GOO catalyst (with a particle size of 2 to 4
As a result, the pressure loss was reduced to less than 100% compared to burrs), and as a result, it became possible to operate the hydrocarbon fuel reformer under stable conditions.

Furthermore, by making the cross section of the carrier an integrally molded body consisting of multi-layered thin walls, (1) mixing of carbon monoxide and water vapor or air in the shift catalyst body 9 is improved, allowing the shift reaction to occur at a lower temperature than before; The idea was to encourage it more.

As is clear from the above description, the hydrocarbon fuel reformer of the present invention provides the following effects.

(1) (30) Since the pressure loss of the inorganic gas before and after the shift catalyst can be significantly reduced, the reforgong reaction and the shift reaction can be performed under stable conditions.

(2) Go? Mixability of carbon monoxide and water vapor or air is improved in the acid catalyst body, resulting in excellent shift reactivity even when the hydrocarbon fuel reformer is fully operated at high space and speed, and catalyst activity is maintained permanently. can be done.

[Brief explanation of the drawing]

The figure is a side sectional view of a hydrocarbon fuel reformer showing one embodiment of the present invention. 8... Reforming catalyst body, 9...
Go transformation catalyst.

Claims (1)

[Scope of Claims] A hydrocarbon fuel reforming device that mixes hydrocarbons with water or air and reformes the mixture into an inorganic gas mainly consisting of hydrogen and carbon dioxide using a reflow pink catalyst body, wherein a rear portion of the reflow pink catalyst body and γ-alumina. A heat-resistant inorganic material such as cordierite or mullite is provided with a support made of multilayer thin walls with a honeycomb-like or lattice-like cross section.
IR supported hydrocarbon fuel reformer.