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Methanol from solid fuels: A cost-effective route to reduced emissions and enhanced energy security
Energy Conversion and Management ( IF 9.9 ) Pub Date : 2022-09-30 , DOI: 10.1016/j.enconman.2022.116272
Carlos Arnaiz del Pozo , Ángel Jiménez Álvaro , Schalk Cloete

Methanol (MeOH) is gaining increasing relevance as a future energy carrier. It can be produced through multiple avenues, including locally available solid fuels where the CO2 footprint of coal-derived MeOH can be strongly reduced through co-gasification with biomass and integration of CO2 capture and storage. This work presents a techno-economic assessment of five MeOH production processes from a 70/30 %w. coal/biomass blend under consistent cost assumptions of 2.5 €/GJ coal, 100 €/ton (6.1 €/GJ) biomass, 100 €/ton CO2 tax and 60 €/MWh carbon-free electricity. The reference plant configuration reached a levelized cost of MeOH (LCOM) of 285.5 €/ton, while the two advanced concepts with a more efficient gasification system reached costs of 245.0–255.0 €/ton. Two additional cases synergistically integrating PEM electrolysers to deliver H2 for improving the syngas H/C ratio and O2 for gasification reached higher LCOM of 363.0–448.8 €/ton due to the higher cost contribution of electricity. An unrealistically low price of 25.6–34.7 €/MWh for a steady-state supply of carbon-free electricity is required for these configurations to break even with the benchmark plant. Finally, MeOH from the best performing plant was shown to be cost-competitive with gasoline produced from 60 €/barrel oil, while total CO2 emissions (including combustion) were 56 % lower. Thus, MeOH from solid fuels offers a cost-effective solution to climate change and energy security in energy importing regions.



中文翻译:

固体燃料中的甲醇:减少排放和增强能源安全的经济有效途径

甲醇 (MeOH) 作为未来的能源载体越来越重要。它可以通过多种途径生产,包括当地可用的固体燃料,通过与生物质的共气化以及 CO 2捕获和储存的整合,可以大大减少煤衍生 MeOH的 CO 2足迹。这项工作对 70/30 %w 的五种 MeOH 生产工艺进行了技术经济评估。煤/生物质混合物在 2.5 欧元/GJ 煤、100 欧元/吨(6.1 欧元/GJ)生物质、100 欧元/吨 CO 2的一致成本假设下税和 60 欧元/兆瓦时的无碳电力。参考工厂配置的 MeOH (LCOM) 平准化成本为 285.5 欧元/吨,而具有更高效气化系统的两​​个先进概念的成本为 245.0–255.0 欧元/吨。由于电力成本贡献较高,另外两个协同集成 PEM 电解槽以提供 H 2以提高合成气 H/C 比和 O 2用于气化的案例达到了 363.0-448.8 欧元/吨的更高 LCOM。这些配置需要以 25.6–34.7 欧元/MWh 的不切实际的低价格实现无碳电力的稳定供应,才能与基准工厂实现收支平衡。最后,来自表现最好的工厂的 MeOH 被证明与用 60 欧元/桶油生产的汽油相比具有成本竞争力,而总 CO2排放(包括燃烧)降低了 56%。因此,固体燃料中的甲醇为能源进口地区的气候变化和能源安全提供了一种经济高效的解决方案。

更新日期:2022-09-30
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