However, the researchers estimate that, besides the green benefits accruing, the initial investment would be repaid in 22 months by the elimination of expensive metallurgical coke from the process, and from selling any oxygen that was surplus to requirements.

然而，研究人员估计，除了产生的绿色效益外，初始投资将在 22 个月内通过从工艺中消除昂贵的冶金焦炭以及出售任何多余的氧气来收回。