In this research, the feasibility of CO₂ mineral carbonation by the use of by-product red gypsum (RG obtained from Huntsman Tioxide, Terengganu, Malaysia) to form iron carbonate (FeCO₃) was evaluated. Toward this aim, the wide-range conditions of key procedure variables such as reaction temperature, reaction time, and CO₂ pressure on the rate of mineral carbonation were studied. In addition, preliminary analyses on red gypsum were carried out to determine its physical and chemical characteristics. The feasibility of direct carbonation of RG to form FeCO₃ was assessed at different CO₂ pressures of 1 to 70 bar and different reaction temperatures of 25 to 200 °C to discover the effects of the key functions on overall direct carbonation. In general, increasing CO₂ pressure to 10 bar was found to increase the overall FeCO₃ purity and carbonation efficiency to 97% and 98%, respectively. Moreover, the reaction temperature affected the conversion rate at two different functions. First, FeCO₃ purity and its carbonation efficiency increased to the maximum values when the reaction temperature increased to 150 °C, and then they were slightly decreased to 91% and 92%, respectively, with increase of temperature to 200 °C. The results also showed that the maximum product purity is achieved at optimum reaction time of 150 min.

在这项研究中，CO的可行性₂矿物碳酸化通过使用副产物红石膏到碳酸盐形式的铁（FeCo系（RG从Huntsman TIOXIDE，丁加奴，马来西亚获得）₃）进行评价。为此，研究了关键工艺变量的宽范围条件，例如反应温度，反应时间和CO ₂压力对矿物碳酸化速率的影响。此外，对红色石膏进行了初步分析，以确定其物理和化学特性。在不同的CO _2条件下评估了RG直接碳酸化形成FeCO ₃的可行性1至70 bar的压力和25至200°C的不同反应温度，以发现关键功能对整体直接碳酸化的影响。通常，发现将CO ₂压力提高到10 bar会使整体FeCO ₃纯度和碳酸化效率分别提高到97％和98％。而且，反应温度在两种不同的功能下影响转化率。首先，当反应温度升高至150°C时，FeCO ₃纯度及其碳化效率增加到最大值，然后随着温度升高至200°C，它们分别略微降低至91％和92％。结果还表明，在150分钟的最佳反应时间即可达到最高的产品纯度。