What Is the Claus Process?

The Claus method is one of the methods used to remove hydrogen sulfide generated during the combustion of fossil fuels and geothermal power generation. The principle is to make the hydrogen sulfide incompletely burn, and then react the generated sulfur dioxide with hydrogen sulfide to generate sulfur. If air and hydrogen sulfide are properly mixed, all hydrogen sulfide can be converted into sulfur and water. This method is widely used in the removal of hydrogen sulfide from exhaust gas in geothermal power generation, but when the concentration of hydrogen sulfide is low, it is more effective to use the Strewood method or the Wright method. The industrial method of converting hydrogen sulfide to sulfur was invented by the Englishman CF Claus in 1883. This method is widely used in the processing of coal, petroleum, and natural gas (such as synthetic ammonia feed gas production, refinery gas processing, etc.). It recovers sulfur in the hydrogen sulfide gas produced by desulfurization, and can solve the problem of atmospheric pollution of refinery exhaust gas . The purity of sulfur recovered by the Claus method can reach 99.8%, which can be used as a sulfur resource for the production of sulfuric acid and can also be used as a chemical raw material in other sectors.

The Kraus method is also a

In 1883, the British chemist Claus developed H ₂ S oxidation to produce sulfur, namely:

3H ₂ S + 3 / 2O ₂ = cat / 570 ~ 600K = 3 / xSx + 3H ₂ O + 615KJ / mol

The above formula is called the Claus reaction. This classic reaction is very difficult to maintain a suitable temperature due to strong exotherm. It can only be obtained by limiting the amount of processing to 80% to 90%.

The traditional Claus method is a relatively mature multi-unit processing technology, which is essentially

The super-Klaus process is a patented technology of Jacobs Company in the Netherlands. It has all the advantages of the Super Klaus process. It is not only suitable for the reconstruction of existing Klaus plants, but also for new plants. There are also several super-Klaus units in operation. Since 2007, several sets of new coal chemical plants in China have adopted Super Klaus sulfur recovery technology, and most of them are currently under construction. Shaanxi Yulin Natural Gas Chemical Co., Ltd., an annual output of 1.4 million tons of coal-to-methanol resources comprehensive utilization project, is one of the five key production technologies. The sulfur recovery technology uses super-Klaus technology. In addition, the Inner Mongolia Tianhe Chemical Co., Ltd.'s first-phase project with an annual output of 1 million tons of coal-to-methanol produced 600,000 tons of methanol has also adopted Super Klaus technology.