Abstract The experimental results of testing with different irradiation power are compared and used as a basis for the feasibility assessment and conceptual design of a photoreforming reactor. The highest H2 productivity (0.276 mol H2/h kgcat) was achieved with 1 g/L of 1 wt% Au/TiO2 P25 catalyst by using a 113 W/m2 UVA irradiation. Insufficient hydrogen productivity for practical deployment was achieved, following reactor design. However, the comparison with the state of the art evidenced that also the energy storage potential of the literature photocatalysts do not allow a short term feasibility of the proposed technology. The potential productivity of hydrogen, as well as solar energy storage efficiency are discussed both for the present experimental values and for the best results in the literature. On the other hand, solar energy can be used to artificially fix CO2, e.g. captured and stored from combustion processes that can be converted back to chemicals or regenerated fuels. The production of H2, HCOOH, HCHO and CH3OH by photoreduction of CO2 has been evaluated as for daily production potential. CO2 photoconversion to formaldehyde can be envisaged as solar energy storage mean with 13.3% efficiency, whereas for the other products the solar energy storage efficiency was below 1%.

中文翻译：

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用于太阳能存储的光反应器的概念设计和可行性评估

摘要 对比了不同辐照功率下的试验结果，作为光重整反应堆可行性评估和概念设计的依据。通过使用 113 W/m2 UVA 照射，使用 1 g/L 1 wt% Au/TiO2 P25 催化剂可实现最高的 H2 生产率（0.276 mol H2/h kgcat）。根据反应器设计，实际部署的氢气生产率不足。然而，与现有技术的比较表明，文献光催化剂的储能潜力也不允许所提出的技术在短期内可行。对于当前的实验值和文献中的最佳结果，讨论了氢的潜在生产力以及太阳能存储效率。另一方面，太阳能可用于人工固定 CO2，例如从燃烧过程中捕获和储存的可转化回化学品或再生燃料。通过光还原 CO2 产生的 H2、HCOOH、HCHO 和 CH3OH 已被评估为每日生产潜力。CO2 光转化为甲醛可以被设想为太阳能存储手段，其效率为 13.3%，而对于其他产品，太阳能存储效率低于 1%。