Journal of Environmental Analytical Chemistry

Department of Chemistry, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya

Publications

• Research Article   
  Characterization and Application of Eburru Zeolite Rocks in Upgrading Biogas to Bio-Methane
  Author(s): James K. Mbugua*, Gabriel A. Waswa, Damaris M. Nduta and Joseph M. Mwaniki
  
  The trace amount of carbon dioxide and hydrogen sulphide in raw biogas lowers its calorific value, causes corrosion and makes it hard to compress the biogas into cylinders. Raw biogas was obtained from anaerobic digestion of cow dung and market wastes. The gas was stored in tubes or urine bags before upgrading process. Eburru natural zeolite rocks were used as the upgrade materials. The measured initial level of raw biogas was 0.0227% H2S, > 20% CO2 and 52-56% CH4. The total removal using zeolite was observed to be 75% CO2 and 95.34% H2S leading to 83.45 – 91.23% methane levels. The morphological structure of zeolitic rocks accounted for its higher upgrading properties. In addition, the porosity in these rocks meant that CO2 and H2S were adsorbed resulting in higher CH4.. Read More»
  DOI: 10.37421/2380-2391.2021.8.334

  Abstract HTML PDF