Small Scale Regenerative Desulfurization of Biogas
van Groenestijn, J.W.
The application of small scale biogas digesters to supply biogas to households in developing countries is well established. The biogas is used for different applications, amongst other cooking. Generally, no further treatment of the biogas is applied. Hydrogen Sulfide (H2S) is present in varying concentrations within the biogas. H2S has negative effects on the durability of the equipment (highly corrosive), thus resulting in high material replacement costs. Furthermore, H2S is very poisonous and exposure must be prohibited. Removal of H2S is essential for an optimal functioning of the biogas system as well as for the health of the people and the environment. The challenge is to provide a cost-effective, robust, regenerative system for effective removal of H2S from small scale biogas digesters. TNO has developed an energy efficient, robust and cheap removal system of H2S from small scale biogas digesters (1-20 Nm3/day) to the lower ppm range. The technology uses an iron chelate solvent. The absorption of H2S and the regeneration of the solvent is combined in a single vessel. A small volume of air is required to be mixed with the incoming biogas to regenerate the solvent, causing the extension of the lifetime of the solvent.
Fluid & Solid Mechanics Healthy Living Life
To reference this document use:
PID - Process & Instrumentation Development HL - Healthy for Life FI - Functional Ingredients
TS - Technical Sciences ELSS - Earth, Life and Social Sciences
High Tech Systems & Materials
2016 UNESCO Chair International Conference, Technologies for Development, 2-4 May 2016, Lausanne, Switzerland
Abstract from an oral presentation