Hydrogen sulfide and ammonia removal from biogas using water hyacinth - derived carbon nanomaterials

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dc.contributor.author Makauki, Elizabeth
dc.contributor.author King’ondu, Cecil K.
dc.contributor.author Kibona, Talam E.
dc.date.accessioned 2017-09-11T11:52:53Z
dc.date.available 2017-09-11T11:52:53Z
dc.date.issued 2017-07
dc.identifier.citation African Journal of Environmental Science and Technology, Vol. 11(7), pp. 375 - 383 , July 2017 en_US
dc.identifier.issn 1996 - 0786
dc.identifier.uri http://www.academicjournals.org/journal/AJEST/article-full-text-pdf/A5F2D5164768
dc.identifier.uri http://repository.seku.ac.ke/handle/123456789/3538
dc.description DOI: 10.5897/AJEST2016.2246 en_US
dc.description.abstract he presence of hydrogen sulfide (H2S) and ammonia (NH3) in biogas pose serious human health and environmental challenges. In this study, H2S and NH3 were successfully removed from biogas using water hyacinth-derived carbon (WHC) nanomaterials. Carbonization temperature, biogas flow rate, mass of the adsorbent and activating agent (KOH/water hyacinth (WH)) ratio were found to greatly influence the efficiency of the H2S and NH3 removal. The adsorption capacity of both H2S and NH3 was found to increase with the carbonization temperature as carbon materials prepared at 450, 550, and 650°C afforded removal efficiencies of 22, 30, and 51% for H2S and 42, 50, and 74% for NH3, respectively, after contact time of 2 h. Similarly, the KOH/WHC ratio showed huge impact on the adsorptive removal of the two species. WH materials carbonized at 650°C and activated at 700°C using 1:4, 1:2, and 1:1 KOH/WHC ratios showed removal efficiencies of 80, 84, and 93% for H2S and 100, 100, and 100% for NH3, correspondingly after 2 h contact time. The adsorption capacity of NH3 increased with the decrease in flow rate from 83 to 100% at flow rates of 0.11 and 0.024 m3/h, respectively, while that of H2S increased from 22 to 93% with flow rate 0.11 and 0.024 m3/h, respectively. The removal of H2S and NH3 increased with adsorbent mass loading. With the 0.05, 0.1, 0.2, and 0.3 g of the adsorbent, the adsorption of H2S after 1.5 h contact time was 63, 93, 93, and 95%, respectively while that of NH3 was 100% for all the adsorbent masses. en_US
dc.language.iso en en_US
dc.publisher Academic Journals en_US
dc.subject Waste water en_US
dc.subject KOH en_US
dc.subject activation ratio en_US
dc.subject carbonization temperature en_US
dc.subject flow rate en_US
dc.title Hydrogen sulfide and ammonia removal from biogas using water hyacinth - derived carbon nanomaterials en_US
dc.type Article en_US

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