In the present work, the effect of temperature on calcium carbonate precipitation in the biomimetic calcium chloride solution was investigated. A spontaneous calcium carbonate precipitate was formed in the biomimetic calcium chloride solution as a result of the carbon dioxide hydration process. The reaction was conducted at different temperature range vary from 30°C to 100°C. The mass of the calcium carbonate precipitate and the pH solution was measured in the study. The finding indicated that an increment of the temperature has led to the fast pH reduction of the solutions to 7.0. However, the process has retarded the calcium carbonate precipitation process. The optimum temperature for higher calcium carbonate precipitation has occurred at the temperature range of 47.5°C – 65°C which gave the highest calcium carbonate precipitate at 0.121g. The addition of Tris buffer into the calcium chloride solution in this study did not gave an inhibition effect on the calcium carbonate precipitate. Based on the results, an operating condition at 47.5°C – 65°C was recommended to be used in mineral carbonization of CO2 using the biomimetic calcium chloride solution.

Carbon dioxide (CO2) is a greenhouse gas that produces from the combustion of fossil fuel. The consumption of fossil fuel in industrial activity has increased the concentration of CO2 emitted in the atmosphere. When the concentration of CO2 increases, the more heat are released. Thus, creating the global warming issue and climate change to the world. This climate change and global warming issue have attract the attention of worldwide. There are lot of carbon capture techniques proposed to overcome these problems. However, most of it are costly, and need a long dissociation and CO2 separation process. Therefore, innovative technique and process optimization are needed in order to improve the process efficiency of this technology. The most common techniques used in this technology are cryogenic, biological technique, and membrane technique. Membrane technique with a biological approach has promising high CO2 separation performance. This mimic enzyme based membrane has several advantages such as low cost, simple production procedure and high CO2 separation performance. From the review, the use of PVA membrane integrated with mimic enzyme could be work together towards the improvement of carbon capture technology. This review provides the information and potential of an alternative approach of carbon capture technology to reduce the amount of CO2 emitted from the fossil fuel industry.

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