Solar chemical power generation system

ACS Energy Letters 9, 9 (2024). Sunlight is a powerful energy source that scientists can leverage to unlock important chemical conversions. In this study, researchers used solar energy to convert carbon dioxide (CO 2), a potent greenhouse gas, into a valuable chemical commodity with a two-step process.

This research shows that solar energy can directly enable chemical conversion to multicarbon products—complex carbon molecules useful for industry. It thus unlocks the potential for innovating other chemical transformations driven directly by renewable energy.

Provided by the Springer Nature SharedIt content-sharing initiative The production of synthetic fuels and chemicals from solar energy and abundant reagents offers a promising pathway to a sustainable fuel economy and chemical industry.

Solar hydrogen production devices have demonstrated promising performance at the lab scale, but there are few large-scale on-sun demonstrations. Here the authors present a thermally integrated kilowatt-scale pilot plant, tested under real-world conditions, for the co-generation of hydrogen and heat.

Key innovations include dual-function carbon-based electrodes for efficient solar absorption and electrochemical reactions, a transparent and ultrainsulating silica aerogel to maximize solar spectrum transmission while minimizing heat loss, and a compact heat exchanger to recover heat from hot cell streams.

A thermally synergistic photo-electrochemical hydrogen generator operating under concentrated solar irradiation. Nat. Energy 4, 399–407 (2019). Rau, S. et al. Highly efficient solar hydrogen generation—an integrated concept joining III–V solar cells with PEM electrolysis cells.