Sulfur Recovery - Claus Sulfur Recovery
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This post was last edited by liaifeng on 2018-9-10 20:03 Sulfur recovery - Claus sulfur recovery At present, there are many large-scale coal chemical projects in China! And there are many large-scale methanol projects! Since most of my country's coal resources are high-sulfur coal, there is a very important issue in coal chemical industry - sulfur recovery! In the past, it was all discharged directly! Nowadays, environmentally friendly large-scale projects are required! We have a responsible attitude towards the environment, so we have purification and sulfur recovery in large-scale methanol, coking and other coal chemical projects! Since I know little about this aspect, I would like to know more! Process principle: In the tail gas treatment system, rich hydrogen gas is added to the sulfur tail gas, and through the hydrogenation reactor, all sulfur-containing compounds in the tail gas are reduced or hydrolyzed into hydrogen sulfide. reduction reaction: SO2+3H2 H2S+ H2O+Q S+H2 H2S+Q hydrolysis reaction: COS+H2 O H2S+ CO2+Q CS2+2H2 O 2H2S+ CO2+Q Then, in the gas-liquid reactor, control H2S/SO2 to 2: 1. To improve the reaction conversion rate. Thermal reaction: H2S＋1.5O2 SO2 + H2O+Q H2S＋2SO2 3/x S + 2H2O+Q Catalytic reaction: H2S＋2SO2 3/x S + 2H2O+Q
Most of the current coal chemical industry still uses front-end desulfurization, mostly using iron oxide and zinc oxide desulfurizers. Claus is a sulfur recovery process, which is mostly used on raw materials containing 30% sulfur. If you want to know more, you can ask.
You are talking about refined desulfurization before methanol synthesis, but what we are talking about here is sulfur recovery.
His question was not clear. He wanted to know what aspects of sulfur recovery and what the reaction mechanism of the exhaust gas he mentioned at the end meant.
What is the composition of the exhaust gas after Claus process treatment?