Climate change is urgently calling for rapid methods to capture atmospheric carbon dioxide (CO₂). CO₂ can be sequestred into gypsum from gas desulfurization by carbonation to produce calcium carbonate (CaCO₃). However, CaCO₃ is produced as a mixture of polymorphs including calcite and vaterite polymorphs, which limits applications. Therefore, we present here a method to produce CaCO₃ enriched in the vaterite polymorph. We reacted CO₂ with gypsum from gas desulfurization in the presence of glycine. Carbonation products were analyzed by X-ray diffraction, scanning electron microscopy, electrospray ionization mass spectrometry, and Fourier transform infrared spectroscopy. Results show that vaterite content increases from 60 to 97% with increasing glycine concentration from 0 to 20 wt% and then kept a constant value, indicating that glycine promotes the formation of vaterite by inhibiting the growth of the calcite polymorph. We also observed that the intermediate glycinate calcium played a major role in stimulating vaterite growth. Overall, nearly pure vaterite was synthesized successfully by carbonation of gypsum in the presence of glycine.

气候变化迫切需要快速捕获大气中二氧化碳（CO ₂）的方法。CO ₂可以通过碳酸化从气体脱硫中螯合到石膏中以生产碳酸钙（CaCO ₃）。然而，CaCO ₃是作为包括方解石和球霰石多晶型的多晶型物的混合物产生的，这限制了应用。因此，我们在此提出一种生产富含球霰石多晶型物的CaCO _{3的方法。}我们反应了 CO ₂与甘氨酸存在下气体脱硫的石膏。通过 X 射线衍射、扫描电子显微镜、电喷雾电离质谱和傅里叶变换红外光谱分析碳酸化产物。结果表明，随着甘氨酸浓度从0 wt%增加到20 wt%，球霰石含量从60%增加到97%，然后保持不变，表明甘氨酸通过抑制方解石多晶型物的生长来促进球霰石的形成。我们还观察到中间体甘氨酸钙在刺激球霰石生长中起主要作用。总体而言，在甘氨酸存在下，通过石膏的碳酸化成功合成了近乎纯的球霰石。