Oldoinyo Lengai mountain located in Northern Tanzania is the only active natrocarbonatite volcano with unusually alkali-rich natrocarbonatites which are not found elsewhere in the world. Volcanic ash formed earlier during eruptions was collected from different sites along the mountain, and its potency to adsorb hydrogen sulfide (H2S) and ammonia (NH3) from biogas was investigated. The samples were calcinated at different temperatures (550℃ - 850℃) and were characterized by X-ray florescent, scanning electron microscopy and X-ray diffraction techniques. The on-site adsorption experiments were conducted at the biogas digester at ambient conditions. The calcinated ash was packed into the reactor bed, biogas allowed to pass through the adsorbent, and the inlet and outlet concentrations of H2S and NH3 were measured. The height of the site where the adsorbent was taken from, calcination temperature, biogas flowrate and mass of the adsorbent were variable parameters and found to influence greatly on the efficiency of H2S and NH3 removal. The efficiency is increased with calcination temperature raise and mass of adsorbent and decreased with flowrate increase. The samples collected from the top site of the mountain and calcinated at 850℃ exhibited the best sorption performance.
Florin, N.H. and Harris, A.T. (2008) Enhanced Hydrogen Production from Biomass with in situ Carbon Dioxide Capture Using Calcium Oxide Sorbents. Chemical Engineering Science, 63, 287-316. https://doi.org/10.1016/j.ces.2007.09.011
Adib, F., Bagreev, A. and Bandosz, T.J. (1999) Effect of pH and Surface Chemistry on the Mechanism of H2S Removal by Activated Carbons. Journal of Colloid and Interface Science, 216, 360-369. https://doi.org/10.1006/jcis.1999.6335
Barelli, L., Bidini, G., Hernàn-dez-Balada, E., Mata-álvarez, J. and Sisani, E. (2017) Performance Characterization of a Novel Fe-Based Sorbent for Anaerobic Gas Desulfurization Finalized to High Temperature Fuel Cell Applications. International Journal of Hydrogen Energy, 42, 1859-1874.
Arnold, M. and Kajolinna, T. (2010) Development of OnLine Measurement Techniques for Siloxanes and Other Trace Compounds in Biogas. Waste Management, 30, 1011-1017. https://doi.org/10.1016/j.wasman.2009.11.030
Karmakar, M.K., Chandra, P. and Chatterjee, P.K. (2015) A Review on the Fuel Gas Cleaning Technologies in Gasification Process. Journal of Environmental Chemical Engineering, 3, 689-702. https://doi.org/10.1016/j.jece.2015.02.011
Awe, O.W., Zhao, Y., Nzihou, A., Minh, D.P. and Lyczko, N. (2017) A Review of Biogas Utilisation, Purification and Upgrading Technologies. Waste and Biomass Valorization, 8, 267-283. https://doi.org/10.1007/s12649-016-9826-4
Bagreev, A. and Bandosz, T.J. (2005) On the Mechanism of Hydrogen Sulfide Removal from Moist Air on Catalytic Carbonaceous Adsorbents. Industrial & Engineering Chemistry Research, 44, 530-538. https://doi.org/10.1021/ie049277o
Sun, Q., Li, H., Yan, J., Liu, L., Yu, Z. and Yu, X. (2015) Selection of Appropriate Biogas Upgrading Technology—A Review of Biogas Cleaning, Upgrading and Utilisation. Renewable and Sustainable Energy Reviews, 51, 521-532.
Tippayawong, N. and Thanompongchart, P. (2010) Biogas Quality Upgrade by Simultaneous Removal of CO2 and H2S in a Packed Column Reactor. Energy, 35, 4531-4535. https://doi.org/10.1016/j.energy.2010.04.014
Kim, K., Jeon, S., Vo, C., Park, C.S. and Norbeck, J.M. (2007) Removal of Hydrogen Sulfide from a Steam-Hydrogasifier Product Gas by Zinc Oxide Sorbent. Industrial & Engineering Chemistry Research, 46, 5848-5854.
Bagreev, A., Bashkova, S., Locke, D.C. and Bandosz, T.J. (2001) Sewage Sludge-Derived Materials as Efficient Adsorbents for Removal of Hydrogen Sulfide. Environmental Science & Technology, 35, 1537-1543.
Siefers, A., Wang, N., Sindt, A., Dunn, J., McElvogue, J., Evans, E. and Ellis, T. (2010) A Novel and Cost-Effective Hydrogen Sulfide Removal Technology Using Tire Derived Rubber Particles. Graduate Theses and Dissertations, Iowa State University, Ames. https://doi.org/10.2175/193864710798182682
Ko, T. and Chu, H. (2005) Spectroscopic Study on Sorption of Hydrogen Sulfide by Means of Red Soil. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 61, 2253-2259. https://doi.org/10.1016/j.saa.2004.09.016
Masebinu, S., Aboyade, A. and Muzenda, E. (2014) Enrichment of Biogas for Use as Vehicular Fuel: A Review of the Upgrading Techniques. International Journal of Research in Chemical, Metallurgical and Civil Engineering, 1, 89-98.
Ko, T.H., Chu, H. and Tseng, J.J. (2006) Feasibility Study on High-Temperature Sorption of Hydrogen Sulfide by Natural Soils. Chemosphere, 64, 881-891.
Long, N.Q. and Loc, T.X. (2016) Experimental and Modeling Study on Room-Temperature Removal of Hydrogen Sulfide using a Low-Cost Extruded Fe2O3-Based Adsorbent. Adsorption, 22, 397-408.
Louhichi, S., Ghorbel, A., Chekir, H., Trabelsi, N. and Khemakhem, S. (2016) Properties of Modified Crude Clay by Iron and Copper Nanoparticles as Potential Hydrogen Sulfide Adsorption. Applied Clay Science, 127, 123-128.
Sánchez-Martín, M., Dorado, M., Del Hoyo, C. and Rodríguez-Cruz, M. (2008) Influence of Clay Mineral Structure and Surfactant Nature on the Adsorption Capacity of Surfactants by Clays. Journal of Hazardous Materials, 150, 115-123.
Thanakunpaisit, N. and Jantarachat, N. (2017) Removal of Hydrogen Sulfide from Biogas using Laterite Materials as an Adsorbent. Energy Procedia, 138, 1134-1139.
Jiang, J.-Q. and Zeng, Z. (2003) Comparison of Modified Montmorillonite Adsorbents: Part II: The Effects of the Type of Raw Clays and Modification Conditions on the Adsorption Performance. Chemosphere, 53, 53-62.
De Schutter, A., Kervyn, M., Canters, F., Bosshard-Stadlin, S.A., Songo, M.A.M., and Mattsson, H.B. (2015) Ash Fall Impact on Vegetation: A Remote Sensing Approach of the Oldoinyo Lengai 2007-08 Erup-tion. Journal of Applied Volcanology, 4, 15. https://doi.org/10.1186/s13617-015-0032-z
Keller, J. and Zaitsev, A.N. (2006) Calciocarbonatite Dykes at Oldoinyo Lengai, Tanzania: The Fate of Natrocarbonatite. The Canadian Mineralogist, 44, 857-876.
Saka, C. (2012) BET, TG-DTG, FT-IR, SEM, Iodine Number Analysis and Preparation of Activated Carbon from Acorn Shell by Chemical Activation with ZnCl2. Journal of Analytical and Applied Pyrolysis, 95, 21-24.
Juárez, M.F.-D., Mostbauer, P., Knapp, A., Müller, W., Tertsch, S., Bockreis, A. and Insam, H. (2018) Biogas Purification with Biomass Ash. Waste Management, 71, 224-232. https://doi.org/10.1016/j.wasman.2017.09.043
Makauki, E., King’ondu, C.K. and Kibona, T.E. (2017) Hydrogen Sulfide and Ammonia Removal from Biogas Using Water Hyacinth-Derived Carbon Nanomaterials. African Journal of Environmental Science and Technology, 11, 375-383.
Garces, H.F., Espinal, A.E. and Suib, S.L. (2012) Tunable Shape Microwave Synthesis of Zinc Oxide Nanospheres and Their Desulfurization Performance Compared with Nanorods and Platelet-Like Morphologies for the Removal of Hydrogen Sulfide. The Journal of Physical Chemistry C, 116, 8465-8474.
Tseng, T.K., Chang, H.C., Chu, H. and Chen, H.T. (2008) Hydrogen Sulfide Removal from Coal Gas by the Metal-Ferrite Sorbents Made from the Heavy Metal Wastewater Sludge. Journal of Hazardous Materials, 160, 482-488.
Seredych, M., Strydom, C. and Bandosz, T.J. (2008) Effect of Fly Ash Addition on the Removal of Hydrogen Sulfide from Biogas and Air on Sewage Sludge-Based Composite Adsorbents. Waste Management, 28, 1983-1992.
Sitthikhankaew, R., Predapitakkun, S., Kiattikomol, R., Pumhiran, S., Assabumrungrat, S. and Laosiripojana, N. (2011) Comparative Study of Hydrogen Sulfide Adsorption by Using Alkaline Impregnated Activated Carbons for Hot Fuel Gas Purification. Energy Procedia, 9, 15-24. https://doi.org/10.1016/j.egypro.2011.09.003
Li, K.-T., Yen, C.-S. and Shyu, N.-S. (1997) Mixed-Metal Oxide Catalysts Containing Iron for Selective Oxidation of Hydrogen Sulfide to Sulfur. Applied Catalysis A: General, 156, 117-130. https://doi.org/10.1016/S0926-860X(96)00417-6
Kastner, J.R., Das, K., Buquoi, Q. and Melear, N.D. (2003) Low Temperature Catalytic Oxidation of Hydrogen Sulfide and Methanethiol Using Wood and Coal Fly Ash. Environmental Science & Technology, 37, 2568-2574.
Cheng, Z. and Liu, M. (2007) Characterization of Sulfur Poisoning of Ni-YSZ Anodes for Solid Oxide Fuel Cells Using in Situ Raman Microspectroscopy. Solid State Ionics, 178, 925-935. https://doi.org/10.1016/j.ssi.2007.04.004
Ansari, A., Bagreev, A. and Bandosz, T.J. (2005) Effect of Adsorbent Composition on H2S Removal on Sewage Sludge-Based Materials Enriched with Carbonaceous Phase. Carbon, 43, 1039-1048. https://doi.org/10.1016/j.carbon.2004.11.042
Mathieu, Y., Tzanis, L., Soulard, M., Patarin, J., Vierling, M. and Molière, M. (2013) Adsorption of SOx by Oxide Materials: A Review. Fuel Processing Technology, 114, 81-100. https://doi.org/10.1016/j.fuproc.2013.03.019
Itodo, A., Abdulrahman, F., Hassan, L., Maigandi, S. and Itodo, H. (2010) Application of Methylene Blue and Iodine Adsorption in the Measurement of Specific Surface Area by Four Acid and Salt Treated Activated Carbons. New York Science Journal, 3, 25-33.