Determination of the chemical and hydrothermal stability of the Claus catalyst Farkhod Yusupov, Murodali Mamanazarov, Bobomurod Xursandov and Gulnoza Baimatova E3S Web Conf., 264 (2021) 01023 Published online: 02 June 2021 DOI: 10.1051/e3sconf/202126401023