Effect of ultramicropores on the mechanisms of H2S retention from biogas

Autor:	Sebastião M. P. Lucena, Moises Bastos-Neto, Jorge Luiz Bezerra de Oliveira, Beatriz Oliveira Nascimento, Rafaelle Gomes Santiago, Diana C. S. Azevedo, Daniel V. Gonçalves
Rok vydání:	2020
Předmět:	Potassium hydroxide Chemistry General Chemical Engineering Hydrogen sulfide Fraction (chemistry) 02 engineering and technology General Chemistry equipment and supplies 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Flue-gas desulfurization chemistry.chemical_compound Adsorption Biogas Chemical engineering Carbon dioxide medicine 0210 nano-technology Activated carbon medicine.drug
Zdroj:	Chemical Engineering Research and Design. 154:241-249
ISSN:	0263-8762
DOI:	10.1016/j.cherd.2019.12.019
Popis:	The pore distribution in activated carbon is crucial for its performance on adsorption processes. In desulfurization applications, the literature highlights the importance of pores from 5 to 10 A. However, little is known and reported about the range of ultramicropores smaller than 4 A, which has been found in commercial samples used for H2S retention. In order to clarify the influence of this fraction of pores on the H2S retention of typical biogas mixtures, measurements of multicomponent adsorption of hydrogen sulfide in the presence of carbon dioxide for activated carbon samples further impregnated with potassium hydroxide have been performed in column dynamics. Molecular simulation, XRF analysis and textural characterization were applied to aid the study. Results have shown that the H2S retention capacity in the presence of CO2 decreased significantly mainly in the impregnated samples. The degree of reduction in H2S retention indicates that ultramicropores can be of substantial importance through a synergistic immobilizing effect of H2S molecules. The better understanding of such an effect could improve the development of more efficient adsorbents for chemical industries.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::65ed0c2c3e316141d1c7383d3dd27cff https://doi.org/10.1016/j.cherd.2019.12.019 Zobrazit plný text záznamu Full Text from ScienceDirect Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.