The status of sulfur recovery catalyst in China

In the sulfur recovery of petroleum and natural gas industry production, mainly include Claus reaction and organic sulfur hydrolysis reaction and deoxidation reaction. Earlier, industrial enterprises in China often used bauxite as a catalyst used in the recycling process. In the 1980s, many research institutes in China jointly researched and produced a type of catalyst that was used in the world at that time. With a higher level of catalyst, that is alumina-based catalyst Ls-801, and then developed a series of catalysts such as Ls-811 on the basis of this catalyst. The simple use of alumina as a catalyst for the Claus reaction, although capable of enhancing the activity of the reaction, has little effect on the hydrolysis activity when treating some organic compounds, and it cannot effectively prevent oxygen leakage during the reaction. The phenomenon occurs. In order to solve the above-mentioned phenomena and problems, some domestic research institutes have developed TiO 2 -based high organosulfur hydrolysis active LS-901 catalyst, and LS-971, which can resist the oxidation of oxygen to form a catalyst for sulfation. In addition, this catalyst can also allow some specially designed components to pass, so that the use of Redox reaction for oxygen removal. With the development of society and people’s increasing awareness of environmental protection, people have put forward new requirements for waste recovery and exhaust emissions. This requires new catalysts to better meet environmental protection requirements after use. In addition, there are many catalysts. Functionalization and the reduction of its own cost are also an important direction of development.

In the recovery process, Al2O3 is a very good catalyst, but this catalyst requires higher operating practices and conditions in daily use, and Al2O3 is very easily contaminated by O2, resulting in sulfation of the catalyst. As a result, the activity of the catalyst is greatly reduced. In view of the fact that the SO 2 /H 2 S concentration and the hydrocarbon content of the acid gas flow rate in the domestic refineries of the domestic refineries vary widely, the acid gas partial combustion method and the high temperature thermal doping second catalytic conversion process are generally adopted, and most of the devices are not In order to ensure the complete combustion of hydrocarbons in the acid gas and to avoid the generation of carbon sequestration catalysts, the use of the SO2/H2S online proportional analysis controller has led to the development of the LS-971 highly active and deoxidized sulfur recovery catalyst.