Nitrogen Tailored Activated Carbon via Microwave Synthesis Method for High Removal of Hydrogen Sulfide


  • Norhusna Mohamad Nor School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Cawangan Pulau Pinang, 13500 Permatang Pauh, Pulau Pinang, Malaysia
  • Lau Lee Chung School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Cawangan Sarawak, Jalan Meranek, 94300 Kota Samarahan, Sarawak, Malaysia.
  • Abdul Rahman Mohamed School of Chemical Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia



Hydrogen sulfide, Activated carbon, Biogas, Nitrogen functionalized


In this work, commercialized palm shell activated carbon was modified into nitrogen-functionalized carbon via urea impregnation method, followed by heat treatment via microwave irradiation at 950 °C. The efficiency of nitrogen-functionalized palm shell activated carbon (N-PSAC) towards hydrogen sulfide (H2S) removal was compared to raw palm shell activated carbon and sodium hydroxide impregnated palm shell activated carbon (NaOH-PSAC). These adsorbents were tested for H2S adsorption using simulated POME biogas composition. The composition of simulated POME biogas contains 3000 ppm of H2S, 40% of CO2 and 59.7% of CH4. Experimental data showed that N-PSAC adsorbent performed better, which obtained comparable adsorption capacity (264.3mg/g) with NaOH-PSAC (240.87mg/g). The chemical and physical properties of the adsorbents were tested using elemental analysis, nitrogen adsorption desorption analysis, FTIR, and SEM analysis. Higher sorption capacity of H2S using N-PSAC showed that the introduction of basic nitrogen functionality via thermal treatment on palm shell activated carbon, significantly improved the performance of palm shell activated carbon as H2S adsorbent.


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