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Gas/solid phase reaction

a solid phase reaction and gas technology, applied in chemical/physical/physical-chemical processes, chemical apparatus and processes, energy-based chemical/physical/physical-chemical processes, etc., can solve the problem of the enormous influence of the cost of solar current on hsub>2 /sub>production

Inactive Publication Date: 2009-01-29
DEUTSCHES ZENTRUM FUER LUFT & RAUMFAHRT EV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0011]Thus, it is the object of the present invention to provide a process which can be performed, in particular, in a reaction chamber system, in which no solid need be separated and which proceeds in a quasi-continuous manner at as low temperatures as possible. It is a further object to provide a solar-operated reactor in which a product (especially hydrogen) is continuously produced although at least two process steps (for example, splitting and regeneration) necessarily proceed sequentially. In particular, it is the object of the present invention to provide a corresponding process for producing hydrogen that can be performed in at least one single reaction chamber, in particular.

Problems solved by technology

However, the limited presence of these sources and the indispensable reduction of greenhouse gases (mainly CO2) require the exploration of alternative resources or processes.
Water splitting by means of electrolysis using solar current is possible, but has the disadvantage of an enormous influence of the cost of solar current on H2 production.

Method used

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Embodiment Construction

[0023]In the process according to the invention, throughout the reaction time of a first sequential step of a chemical reaction in a first reaction chamber, a second sequential reaction step other than said first sequential reaction step proceeds at least one time in a second reaction chamber, which is different from the first. Thereby, it is achieved that the final product can be provided by the process at any time and the reaction chambers are utilized optimally.

[0024]Since the different sequential reaction steps can have a different reaction time, for optimally utilizing the capacity of the reaction chambers, advantageously:

a) the energy input in the reaction chambers can be selected differently to adjust the reaction rates;

b) the mass flow of the reactants can be adjusted; and / or

c) the number of reaction chambers can be adjusted in accordance with the reaction times in which the reactions proceed in a corresponding time-shifted mode.

[0025]The latter variant is further illustrate...

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Abstract

The invention relates to a process and reactor for the quasi-continuous performance of a chemical reaction on the surface of a fixed reactant in a gas / solid phase reaction. In particular, the invention relates to a thermal process and a reactor for the continuous preparation of hydrogen from water vapor on the surface of a metal oxide in a gas / solid phase reaction.

Description

1) FIELD OF THE INVENTION[0001]The invention relates to a process and reactor for the quasi-continuous performance of a chemical reaction on the surface of a fixed reactant in a gas / solid phase reaction. In particular, the invention relates to a thermal process and a reactor for the continuous preparation of hydrogen from water vapor on the surface of a metal oxide in a gas / solid phase reaction.2) BACKGROUND OF THE INVENTION[0002]On a long-term basis, hydrogen is an important carrier for a sustainable energy supply. Today, most of the hydrogen is prepared from fossil sources. However, the limited presence of these sources and the indispensable reduction of greenhouse gases (mainly CO2) require the exploration of alternative resources or processes. Water splitting by means of electrolysis using solar current is possible, but has the disadvantage of an enormous influence of the cost of solar current on H2 production. The direct utilization of concentrated solar radiation for thermoche...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C01B3/10B01J19/12
CPCB01J19/127B01J19/2485Y02E60/36C01B3/063B01J2219/00038
Inventor ROEB, MARTINSATTLER, CHRISTIANRIETBROCK, PETER-MICHAELKLUSER, RUTHKONSTANDOPOULOS, ATHANASIOS G.AGRAFIOTIS, CHRISTOSDE OLIVEIRA, LAMARKSCHMITZ, MARK
Owner DEUTSCHES ZENTRUM FUER LUFT & RAUMFAHRT EV
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