Comparison of Biochar Materials Derived from Coconut Husks and Various Types of Livestock Manure, and Their Potential for Use in Removal of H2S from Biogas

As a potential adsorbent material, loose, porous livestock manure biochar provides new approach to resource utilization. In this study, coconut husks (CH) and manure, i.e., cow dung (CD), pig (PM), chicken (CM) were used as biomass precursors for preparation of via high-temperature pyrolysis CO2 activation. Characterization technologies, such scanning electron microscopy, Fourier transform infrared spectroscopy, adsorption–desorption isotherms, pore size distributions, study the microscopic morphologies physicochemical properties unactivated activated materials. The results showed that CD better adsorption performance (up 29.81 mg H2S/g) than CM or PM biochar. After activation at 650° 1 h, best was 38.23 H2S/g. For comparison, CH removal 30.44 Its 38.73 H2S/g after h 750 °C. is equivalent temperature 100 °C higher. Further material characterization indicates H2S livestock-manure–derived not entirely dependent on specific surface area, but closely related distribution.