US 12,240,756 B2 · Solar receiver-reactor

Abstract

The invention relates to a method for producing syngas by means of solar radiation, in which the reactor of a receiver-reactor is periodically heated via an aperture provided in the same for solar radiation by means of the solar radiation to an upper reduction temperature for a reduction process and subsequently cooled to a lower oxidation temperature for an oxidation process in the presence of an oxidation gas, wherein the sunlight is guided through an absorption chamber onto an absorber configured as a reactor, which includes a reducible/oxidizable material, and wherein a gas that absorbs the black-body radiation of the absorber is guided through the absorption chamber and the absorption chamber is configured so that the back radiation of the absorber through the aperture is essentially absorbed by the gas. Radiation losses caused by back radiation of the black-body radiation exiting the optical aperture are thus avoided in accordance with the invention. The heat of the back radiation, however, can be utilized directly in the heat-transporting fluid and is available for a flexible usage. The receiver-reactor has a simple design and is suitable as a low-cost receiver-reactor.

Claims29

Dependent claims

A method for producing syngas by using solar radiation, in which a reactor of a receiver-reactor is periodically heated via an aperture provided therein for solar radiation using the solar radiation to an upper reduction temperature (TO) for a reduction process and subsequently cooled to a lower oxidation temperature (TU) for an oxidation process in the presence of an oxidation gas, comprising:

guiding sunlight through an absorption chamber onto an absorber configured as the reactor, which includes a reducible/oxidizable material;
and
guiding a gas that absorbs black-body radiation of the absorber through the absorption chamber, wherein an absorption area is configured so that 80% or more of the black-body radiation of the absorber present on a path to the aperture is absorbed.

A solar reactor-receiver comprising:

an optical aperture for radiation of the sun;
an absorber arranged in a path of incident light;
a redox reactor for a redox reaction;
a transport arrangement in which an oxidizing gas is guided in a serviceable state to and away from the reactor, wherein the absorber is configured as the redox reactor;
and
an absorption chamber is arranged between the aperture for the radiation of the sun and the absorber in the path of the incident light and in the path of black-body radiation of the absorber, wherein the transport arrangement includes a circuit line arrangement, in which a heat-transporting fluid circulates, wherein the circuit is configured in such a manner that the heat-transporting fluid can be charged with heat in an absorption area and cooled again in the heat exchanger, wherein the heat-transporting fluid is an infrared-absorbing gas that absorbs black-body radiation of the absorber travelling on a path through the aperture.

3 more elements

Dependencies are inferred from the claim text.

Solar receiver-reactor

Life of this patent

Solar receiver-reactor

Life of this patent

Abstract

Claims29