Paper details

Title:

Pilot Plant for Biogas Upgrading by Chemical Absorption in Amino Acid Salt Solutions with Solvent Regeneration at Moderate Temperatures

Author(s):

Klein, B., Schmidt, M.O., Scheffknecht, G.

Document(s):

Abstract:

One of the existing state of the art technologies for biogas upgrading is the chemical scrubbing of carbon dioxide (CO2) with aqueous amine-based solvents. As the solvent normally is regenerated by steam stripping at temperatures of about 120 °C, the process has the drawback of high thermal energy consumption. One alternative possibility for the solvent regeneration might be the combination of air stripping with a moderate temperature increase. Laboratory investigations were carried out in order to identify suitable solvents for the proposed process. Potassium salt solutions of the amino acids glycine and threonine show promising results as they feature a high working capacity and are stable under the process conditions. The feasibility of the process was already shown in a laboratory plant consisting of two bubble columns. With the results obtained in laboratory experiments a highly flexible pilot plant was designed and constructed, which allows detailed investigations of chemical CO2 scrubbing with solvent regeneration via steam and air stripping.

Keywords:

biogas, CO₂ capture, gas cleaning, upgrading, absorption, low temperature

Topic:

Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials

Subtopic:

Biomethane

Event:

24th European Biomass Conference and Exhibition

Session:

3BV.3.11

Pages:

1155 - 1161

ISBN:

978-88-89407-165

Paper DOI:

10.5071/24thEUBCE2016-3BV.3.11

Price:

FREE