Characterization and evaluation of effective parameters for Alumina Claus Catalysts in Iranian Refineries

Subject Areas :

maryam safaei ¹ (Assistant Prof. of Materials Engineering, Research Institute of Petroleum Industry (RIPI), Tehran, Iran)
akbar Irandoukht ² (Assistant Prof. of Chemical Engineering, Research Institute of Petroleum Industry (RIPI), Tehran, Iran)

Received: 2019-09-22 Accepted : 2020-02-20 Published : 2020-08-22

Keywords: Alumina, catalyst, Nanostructure, Sulfur recovery, Surface properties,

Abstract :

Claus process is based on hundreds process of sulfur recovery units in the worldwide because of the shortening sweet hydrocarbons reservoirs and increasing the extraction of oil and gas from sour reservoirs. Suitable selection and predicting the performance of pure alumina Claus catalysts in view of the diversity of manufacturers and the high consumption is an important issue in the efficiency of Claus process. In this paper, catalysts were taken and their physical, chemical, and microstructural properties were evaluated by X-ray diffraction, scanning electron microscope, nitrogen and mercury adsorption, mechanical resistance etc. According to the results obtained from the study of the properties, the presence of active alumina phases and sodium impurity up to 2500 ppm, the lack of boehmite phase and others impurities like silica and iron oxide, good distribution of pore volumes for increasing active surface area and free access to the reaction zone are important properties. These properties lead to a longer life for the catalyst. The high attrition and mechanical resistance with maintaining proper distribution of pore volume and low density are important characters for the catalyst selection. Nanostructured catalysts have suitable properties.

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