Steam methane reforming (SMR)-based methanol synthesis plants utilizing a single CO₂ feed represent one of the predominant technologies for improving methanol yield and CO₂ utilization. However, SMR alone cannot achieve full CO₂ utilization, and a high water content accumulates if CO₂ is only fed into the methanol reactor. In this study, a process integrating SMR with dry methane reforming to improve the conversion of both methane and CO₂ is proposed. We also propose an innovative methanol production approach in which captured CO₂ is introduced into both the SMR process and the recycle gas of the methanol synthesis loop. This dual CO₂ feed approach aims to optimize the stoichiometric ratio of the reactants. Comparative evaluations are carried out from a techno-economic point of view, and the proposed process is demonstrated to be more efficient in terms of both methanol productivity and CO₂ utilization than the existing stand-alone natural gas-based methanol process.

中文翻译：

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使用双CO 2进料和干甲烷重整来提高甲醇收率的有效技术

使用单一CO ₂进料的基于蒸汽甲烷重整（SMR）的甲醇合成装置代表了提高甲醇产率和CO ₂利用率的主要技术之一。但是，仅将SMR不能充分利用CO ₂，如果仅将CO ₂进料到甲醇反应器中，则会积累大量的水。在这项研究中，提出了一种将SMR与干甲烷重整相结合以提高甲烷和CO ₂转化率的方法。我们还提出了一种创新的甲醇生产方法，其中将捕获的CO ₂引入SMR工艺和甲醇合成回路的循环气中。这个双重CO ₂进料方法旨在优化反应物的化学计量比。从技术经济角度进行了比较评估，并且与现有的独立的基于天然气的甲醇制程相比，拟议的制程在甲醇生产率和CO ₂利用率方面均得到了证明。