Preparation of Modified Semi-Coke-Supported ZnFe(2)O(4) Sorbent with the Assistance of Ultrasonic Irradiation.

Modified semi-coke (MSC) supported ZnFe(2)O(4) was prepared under the condition of ultrasonic irradiation. Performance of the sorbents was tested using a fixed-bed reactor as a hot gas desulfurizer. The MSC support, the mass ratio of zinc ferrites to the support, calcination temperature, and the ultrasonic conditions of power and time all had influences on the structure and the breakthrough behavior of the sorbent. Ultrasonic irradiation can help to make ZnFe(2)O(4) highly dispersed on MSC. ZnFe(2)O(4)/MSC had increased porosity and a larger specific surface area compared to unsupported ZnFe(2)O(4). The sorbent exhibited a higher sulfur capacity at the optimum preparing conditions, where the mass ratio of ZnFe(2)O(4) to MSC was 8:10, calcinated at 500°C, and the ultrasonic power and time was 900 W and 1.5 h, respectively.