To address the pressing challenges of energy security and global warming, the coupling of the energy generation and transport sectors using Power-to-Fuel (PtF) technologies is an attractive strategy. PtF means the synthesis of transport fuels based on CO₂ from industrial exhaust gases and H₂ produced from renewable electricity via electrolysis.

This paper provides a comprehensive overview of the synthesis possibilities and potentials of H₂ and CO₂-based methanol and higher alcohols (C₁–C₈; from methanol up to octanol) as alternative transport fuels by adapting established and novel alcohol synthesis pathways to the PtF concept and assessing their technical maturity using the Technology Readiness Level (TRL) method. A literature review reveals that among the alcohols, methanol, ethanol, 1-/2-/iso-butanol and 1-octanol have the highest relevance for fuel blending. With the aim to give a first impression, we roughly estimated and discussed the production costs depending on the H₂ costs. We estimated the TRL of promising synthesis pathways towards alcohols at 8 for methanol and at 4 for ethanol, 1-butanol and iso-octanol. For 1-octanol, no suitable synthetic pathway is currently known.

为了应对能源安全和全球变暖的紧迫挑战，使用动力燃料（PtF）技术将能源发电和运输部门结合起来是一种有吸引力的策略。PtF是指基于工业废气中的CO ₂和通过电解由可再生电力产生的H ₂合成基于运输燃料的燃料。

本文通过适应已建立和新颖的醇类合成途径，对作为替代运输燃料的基于H ₂和CO ₂的甲醇和高级醇（C ₁ –C ₈；从甲醇到辛醇）的合成可能性和潜力进行了全面概述。PtF概念，并使用技术准备水平（TRL）方法评估其技术成熟度。文献综述表明，在醇中，甲醇，乙醇，1- / 2- /异丁醇和1-辛醇与燃料混合的相关性最高。为了给人留下第一印象，我们粗略估计和讨论了取决于H ₂的生产成本费用。我们估计有希望的向醇的合成途径的TRL在甲醇中为8，在乙醇，1-丁醇和异辛醇中为4。对于1-辛醇，目前尚无合适的合成途径。