In this paper, CO₂ hydrogenation to methanol is investigated with three objective functions, i.e. maximization of reactor productivity, CO₂ utilization, and hydrogen conversion. Key performance indicators of methanol production via conventional and CO₂ hydrogenation routes are compared.

The results suggest that the methanol production rate with an inlet H₂/CO₂ of 3 is ca. 59 % greater than the case with the inlet H₂/CO₂ composition of 2. The overall hydrogen and CO₂ conversion of the cases with the inlet H₂/CO₂ of 3 is greater than the reactor system with the inlet H₂/CO₂ of 2.

For each objective function criteria, the analysis shows that increasing the H₂/CO₂ to the methanol reactor increases the natural gas consumption in the conventional route and the higher the inlet H₂/CO₂ ratio, the higher the CO₂ emission is. If the inlet hydrogen is produced via water electrolysis, the CO₂ emission of the CO₂ hydrogenation process route will be negative.

本文以三个目标函数为研究对象，研究了CO ₂加氢制甲醇的最大功能，即反应器生产率的最大化，CO ₂利用率和氢转化率。比较了通过常规和CO ₂加氢路线生产甲醇的关键性能指标。

结果表明，入口H ₂ / CO ₂为3时，甲醇的产率约为。59％大于与入口小时壳体₂ / CO ₂的2.总体氢组合物和CO ₂转化率的与入口小时箱子₂ / CO ₂的3比与入口小时反应器系统提供更大的₂ / CO ₂之2。

对于每个目标函数标准，分析表明，增加甲醇反应器中的H ₂ / CO ₂会增加常规路线中的天然气消耗，并且进口H ₂ / CO ₂比率越高，CO ₂排放就越高。如果入口氢是通过水电解产生的，则CO ₂加氢工艺路线的CO ₂排放将为负。