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Show 4. Development of CS2 Removal Technique At first, we studied adsorption process and others for CS2 removal, but they were not practical because of short life or expensive running cost. Therefore we aimed at developing a dry absorbent using amine compound which has been used in conventional wet processes. With the secondary amine R2NH, the CS2 absorption reaction is as follows: Numerous types of amines are capable of absorbing CS2, but for practical use we must select the best of them considering the following items: a. Degradation occurring in the absorption process b. Decreasing by vaporization c. Removal efficiency In addition, we studied the effects of features of solid carriers for amines, including acidity, pore surface area and pore diameter. The results of development are shown below. (1) Effect of amines We made experiments about several amines, and found that the secondary amine is most effective as is in conventional wet processes. However, among secondary amines, there was a large difference of efficiency as is shown in Fig.2. The amine A showed that it is superior in terms of service life and efficiency. (2) Effect of solid carriers Fig.3 shows the result of a comparative test of several solid carriers and indicates that the most effective choice is calcium silicate. This result is explained as follows: 5 |