In the first step of the wet catalytic process, the sulfur component H2S from the exhaust gases is catalytically converted to SO2. In a subsequent step at 400°C, the conversion to SO3 takes place, which then reacts with the atmospheric moisture to produce sulfuric acid. By using the heat of the reaction and the exhaust gases, this process can be operated without additional ther-mal energy even at low exhaust gas concentrations (S-components < 0.2 Vol%).
LiquiSonic® ensures an accurate concentration measurement of sulfuric acid, even at high acid concentrations. Each process step can be both monitored continuously with the inline LiquiSonic® analyzer and be optimally set. Sonic velocity changes significantly with minor changes in sulfuric acid concentration, allowing the LiquiSonic measurement to reach an accuracy of +/- 0.05 wt%.