Potential Economic Feasibility of Direct Electrochemical Nitrogen Reduction as a Route to Ammonia
Potential Economic Feasibility of Direct Electrochemical Nitrogen Reduction as a Route to Ammonia
复制标题
DOI：
10.1021/acssuschemeng.0c01206
复制
发表时间：
2020-06-22
影响因子：
8.4
通讯作者：
Aleti, Saketh
中科院分区：
文献类型：
--
作者：
Hochman, Gal;Goldman, Alan S.;Aleti, Saketh
哈伯-博世工艺利用氢气和氮气生产氨，这是一种全球重要的能源密集型工艺，使用煤或天然气作为燃料和氢源。使用可再生能源从氮和水直接电化学合成氨是哈伯-博世工艺的一种替代方案，更加可持续。此外，直接电化学氮还原技术的不同生产结构提出了氨工业的供应链替代方案以及电网负载均衡的方法。与哈伯-博世工艺相比，这种从氮气生产氨的替代路线需要的资本投资更少，并且不需要化石燃料供应。针对可以利用定价波动的系统，分析了动态电力定价的影响。我们表明，在某些情况下，在未来电催化剂可达到的能源效率水平上，与基于哈伯-博世的氨生产相比，直接氮还原将具有经济竞争力或优势。
The Haber-Bosch process produces ammonia from hydrogen and nitrogen gases in a globally important energy-intensive process that uses coal or natural gas as a fuel and hydrogen source. Direct electrochemical ammonia synthesis from nitrogen and water using renewable energy sources presents an alternative to the Haber-Bosch process that would be more sustainable. Additionally, the different production structure of direct electrochemical nitrogen reduction technology suggests a supply chain alternative to the ammonia industry and a method for load leveling of the electrical grid. This alternative route to ammonia from dinitrogen would require smaller capital investments than the Haber-Bosch process and would not require a fossil fuel supply. The impact of dynamic electrical power pricing is analyzed for a system that could take advantage of pricing volatility. We show that, under certain scenarios, at achievable levels of energy efficiency with a future electrocatalyst, direct nitrogen reduction would be economically competitive or advantageous compared with Haber-Bosch-based ammonia production.