Characterization of Ecuadorian Clay Pellets for their Potential Adsorption of Hydrogen Sulfide
Ecuadorian clays were proposed as an H2S adsorbent, thanks to the fact that their high porosity and highs surface area as a plus this element is abundant, cheap and environmentally friendly. Also, they are proposed in order to help the corrosion in oil and gas industry. Ecuador has non-metallic depo...
Պահպանված է:
| Հիմնական հեղինակ: | |
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| Ձևաչափ: | bachelorThesis |
| Լեզու: | eng |
| Հրապարակվել է: |
2020
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| Խորագրեր: | |
| Առցանց հասանելիություն: | http://repositorio.yachaytech.edu.ec/handle/123456789/241 |
| Ցուցիչներ: |
Ավելացրեք ցուցիչ
Չկան պիտակներ, Եղեք առաջինը, ով նշում է այս գրառումը!
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Ավելացրեք ցուցիչ | Ամփոփում: | Ecuadorian clays were proposed as an H2S adsorbent, thanks to the fact that their high porosity and highs surface area as a plus this element is abundant, cheap and environmentally friendly. Also, they are proposed in order to help the corrosion in oil and gas industry. Ecuador has non-metallic deposits which have a variety of minerals. In this work, eight clays from three provinces were studied which had a drying treatment, extraction of organic material, and labeling. After this process, pellets were made from the clay with special molds for each type of test. The mechanical tests consisted of investigating the resistance to free fall and the compression force of the clays. The characterization of the clays was studied with several techniques: Scanning Electron Microscopy – Energy Dispersive X-ray spectroscopy (SEM-EDX), Fourier Transform Infrared (FTIR), Thermogravimetric Analysis (TGA), X-Ray fluorescence (XRF), X-Ray powder Diffraction (XRD), X-Ray Photoelectron Spectroscopy (XPS) and N2 Adsorption and Desorption. SEM-EDX studies revealed the presence of oxygen (O), silicon, (Si), aluminum (Al), phosphorus (P), sodium (Na), nitrogen (N), and carbon (C) at dry and calcined samples. Sulfur (S) appeared only after exposing the pellets to an H2S atmosphere. FTIR showed peaks that confirmed the presence of disordered kaolinite. The XRD results showed the presence of quartz, kaolinite, guidotite, orthoclase, muscovite, hematite, sernamontite, titanite, and zircon in the dry and calcined state of the clay. After clay reacted, it presented two new phases: kornelite and elemental sulfide. TGA analyzes showed that the mass loss is due to hydration of the water and dehydroxylation of the clays. The calcined and dry clays showed isotherms with a profile similar to the type II isotherm with the nitrogen adsorption-desorption study. The XRF analysis showed the presence of Ca, K, Ni, Sr, Ti, Zn and Zr in dry and calcined pellets, while the presence of sulfur was only observed in reacted clays. XPS analysis for reacted clays showed the fit curves of S 2p, O 1s, Si 2p, Al 2p, Fe 2p3, and Cl 2p. |
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