相关实验视频
Updated: May 9, 2026

10:00
Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
通过通过异热氧化回氧循环将水分解来有效生成H2
Christopher L Muhich1, Brian W Evanko, Kayla C Weston
1Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80303, USA.
概括
同热水分裂 (ITWS) 消除了太阳能热水分裂 (STWS) 周期中的温度波动. 这种使用赫西尼特循环的新方法显著提高了气生产效率.
科学领域:
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 太阳能热水分裂 (STWS) 是利用太阳光和水产生气 (H2) 的一个有前途的方法.
- 传统的两步式STWS循环依赖于经过高温降解和再氧化的金属氧化物,导致热循环的效率损失.
研究的目的:
- 研究同热水分裂 (ITWS) 的可行性,以克服传统STWS循环的局限性.
- 为了评估在同热条件下对增强H2生产的hercynite循环的性能.
主要方法:
- 开发并测试了一种在恒定高温下运行的同热水分裂 (ITWS) 工艺.
- 在没有显著的温度波动的情况下,利用了hercynite循环进行连续的减少和再氧化步骤.
- 量化气生产能力,按活性物质的质量计算.
主要成果:
- 证明温度波动对于高效的STWS是不必要的.
- 在同热条件下的赫锡尼特循环实现了赫锡尼特H2生产能力的3倍以上.
- 赫西尼特循环显示,在1350°C降解和1000°C再氧化时,的H2生产能力是的12倍以上.
结论:
- 同热水分裂 (ITWS) 通过消除热损失,为传统的STWS方法提供了显著的进步.
- 赫西尼特循环是ITWS的高效材料,显示出优越的气生产能力.
- 这项研究为更高效,更实用的太阳能气发电技术铺平了道路.
相关概念视频
Hess's Law
There are two ways to determine the amount of heat involved in a chemical change: measure it experimentally, or calculate it from other experimentally determined enthalpy changes. Some reactions are difficult, if not impossible, to investigate and make accurate measurements for experimentally. And even when a reaction is not hard to perform or measure, it is convenient to be able to determine the heat involved in a reaction without having to perform an experiment.
Batteries and Fuel Cells
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
The Z-Scheme of Electron Transport in Photosynthesis
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
Electrolysis
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
Radical Formation: Homolysis
A bond is formed between two atoms by sharing two electrons. When this bond is broken by supplying sufficient energy, either two electrons can be taken up by one atom forming ions by the cleavage called heterolysis, or the two electrons are shared by two atoms, with one each creating radicals by the cleavage called homolysis.
Balancing Redox Equations
Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
