Electro-thermal chemical cycle coupled solar fuel preparation system and method

Abstract

The invention discloses an electro-thermal chemical cycle coupled high-efficiency solar fuel preparation system and method. The system mainly comprises a light condensing and frequency dividing subsystem, a three-step methane steam reforming subsystem, and a high-temperature water electrolytic hydrogen producing subsystem, wherein a first solar spectrum obtained by the light condensing and frequency division subsystem drives the three-step methane steam reforming subsystem to perform a three-step methane water reforming reaction through heat collection; then a second spectrum drives the high-temperature water electrolytic hydrogen producing subsystem to perform reaction of producing H2 by electrolyzing water through a photovoltaic cell; the three-step methane steam reforming subsystem canprovide thermal energy, high-temperature steam source and reducing atmosphere to the high-temperature water electrolytic hydrogen producing subsystem, and pure O2 produced by the high-temperature water electrolytic hydrogen producing subsystem can be directly used in the three-step methane steam reforming subsystem. The high-efficiency solar fuel preparation system and method realize the synergistic coupling of solar thermochemical and electrochemical processes, and can efficiently produce pure hydrogen and high-quality syngas and efficiently convert solar energy into hydrocarbon and hydrogenfuel.

Description

technical field [0001] The invention relates to the technical field of fuel preparation, in particular to a solar fuel preparation system and method coupled with an electro-thermochemical cycle. Background technique [0002] my country is a country rich in coal, poor in oil, and low in gas, and burning coal will cause serious pollution to the environment. Energy issues are related to the national economy and the people's livelihood, and are the main restrictive factors for the rapid and healthy development of my country's economy. The development and utilization of renewable and clean energy, especially the rational and effective use of solar energy, is an important means to solve this problem. [0003] Solar energy is widely distributed, but it is discontinuous and unstable. It is particularly important to find a way to store solar energy efficiently. At present, using solar energy to produce fuel is an effective way to collect, fix and store solar energy. However, using s...

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Problems solved by technology

However, the amount of hydrogen produced by water decomposition in the two-step methane chemical chain reforming

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