| 摘要 |
<p>The invention relates to a method for purifying biogas from a biogas installation, and a gas purification system, by which means hydrogen sulphide (H<SUB>2</SUB>S) and ammonia (NH<SUB>3</SUB>) are at least partially removed from the unpurified biogas. According to the invention, hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>) is supplied to the biogas during a hydrogen sulphide purification step (K02), and the sulphuric acid (H<SUB>2</SUB>SO<SUB>4</SUB>) formed during the hydrogen sulphide purification step (K02) by the reaction of hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>) and hydrogen sulphide (H<SUB>2</SUB>S) is added in an ammonia purification step (K01) during which ammonium sulfate is formed by the reaction of ammonia (NH<SUB>3</SUB>) with sulphuric acid (H<SUB>2</SUB>SO<SUB>4</SUB>).</p> |
