Gas Cleaning

Wet Gas Cleaning

In wet gas cleaning, pollutants and aerosols are removed from exhaust gases by means of absorption and chemisorption. In addition, mechanical and dynamic aerosol separators and wet electrostatic precipitators are used here.

Dry Gas Cleaning

In dry gas cleaning, mainly adsorptive and separating methods are used to remove pollutants that have arisen during combustion processes. HUGO PETERSEN has been successfully using dry sorption, SCR processes and activated coke filter technology for many years.

Gas purification technology

HUGO PETERSEN GmbH has been active in the field of industrial gas treatment and purification for over 70 years. In the early days, gas purification for SO2-containing waste gases for the production of sulphuric acid using the contact process was the driving force behind the use of this technology.

However, during the early ’60s, gas purification, outside of Sulphuric Acid production, also became an area of activity and expertise for HUGO PETERSEN.

In addition to the separation of acidic components from waste gases, aerosol separation was, and still is, a decisive technological component of our portfolio.

Gas cleaning by HUGO PETERSEN


  • Wet gas cleaning
  • Dry gas cleaning
  • Aerosol separation


  • Absorptive
  • Adsorptive
  • Catalytic
  • Mechanical


  • Sulphuric acid and oleum
  • SO3 and SO2 as gas or liquid
  • CaSO4, NaSulfite, Na2SO4 (NH4)2SO4
  • HCI and others

Our technology is divided into the following main groups :

  • Wet gas cleaning
  • Dry gas cleaning
  • Catalytic gas cleaning
  • Aerosol separation

The declared aim of a gas purification concept is also the optimal combination of the individual technologies.

With an objective of:

  • Resource recovery
  • Energy saving
  • Energy utilisation

The following lists are intended to provide an overview, but do not claim to be complete.

Wet gas cleaning

Absorptive separation of gas components in alkaline as well as partially acidic media

  • Acid gas components such as SO2, SO3, HCl, HF and other acid gas components
  • Heavy metals such as As. Hg, Se, Cd and others

Adsorptive separation of gas components or particulate components

  • Acid gas components such as SO2, SO3, HCl, HF and other acid gas components
  • Heavy metals such as As. Hg, Se, Cd and others
  • Organic components such as Dioxins, Furans, PCBs, HCB and others

Catalytic decomposition or conversion of

  • SO2, NOX, N2O, Dioxins, Furans, PCBs, HCB and others and CO

Aerosol and fine dust separation of Acidic liquid aerosols, Organic aerosols, as well as particulate matter

by means of:

  • Static centrifugal separators
  • dynamic / rotating centrifugal separators
  • electrostatic precipitators

Extraction of valuable materials

The separated components are also used to obtain valuable materials such as:

  • REA-Plaster as a use
    – in the construction industry
    – as an aggregate for ceramics and cement production – etc.
  • Sodium sulphite solutions for use in the beverage industry
  • Mg-Sulphite-Solutions
  • Ammonium sulphate
  • Hydrochloric acid
  • Sulphuric acid
  • Oleum
  • SO2-Rich gases
  • SO2-liquid
  • SO3-Gas
  • SO3-liquid

Are you currently planning a project?
Contact us.