Geothermal fluid utilization is considered one of the green energy sources. Yet, mitigation strategies must be applied to reduce the associated pollutants like carbon dioxide (CO₂) and toxic hydrogen sulfide (H₂S) emissions. One suggested method is the re-injection of the two gases back into the geothermal reservoir wherein carbon and sulfur are expected to mineralize naturally for a long-term underground storage. However, CO₂ and H₂S mineralization rates for natural systems are not well defined. To address the feasibility of such sequestration, experiments were conducted at 250 °C for several reservoir rock types, ranging from basaltic to silicic. Analysis of solution composition and secondary mineralogy confirmed the precipitation of Fe-Ca carbonates and Fe sulfide for all the rocks within days. The measured mineralization rates indicate that ∼0.2–0.5 t of CO₂, and ∼0.03–0.05 t of H₂S can be sequestrated annually per cubic meter of rock, depending on reservoir lithology and surface area. Calculations show that a total rock sequestration capacity of ∼0.03 km³ would be sufficient to store the annual world CO₂ and H₂S geothermal emissions. These findings indicate efficient abatement of CO₂ and H₂S at field conditions, confirming the strategy potential for at least the typical 50 years-lifetime of geothermal power plants.

地热流体利用被认为是绿色能源之一。但是，必须采取缓解策略来减少相关的污染物，例如二氧化碳（CO ₂）和有毒的硫化氢（H ₂ S）排放。一种建议的方法是将两种气体重新注入地热储层，其中碳和硫有望自然地矿化以长期地下储存。但是，CO ₂和H ₂天然系统的S矿化率尚未明确定义。为了解决这种隔离的可行性，我们在250°C下针对从玄武质到硅质的几种储层岩石进行了实验。溶液成分和次生矿物学的分析证实了几天内所有岩石的Fe-Ca碳酸盐和Fe硫化物的沉淀。测得的矿化速率表明，每立方米岩石每年可封存约0.2-0.5 t的CO ₂和约0.03-0.05 t的H ₂ S，这取决于储层的岩性和表面积。计算表明，总的岩石固存能力约为0.03 km ³，足以存储每年的世界CO ₂和H _2。s地热排放。这些发现表明在野外条件下可以有效地减少CO ₂和H ₂ S，从而确认了至少在地热发电厂的典型50年使用寿命中的战略潜力。