Screening activated carbons produced from recycled petroleum coke for acid gas separation

Jacobs, John H.; Chou, Nancy; McKelvie, Kaylan H.; Commodore, Jerry A.; Sui, Ruohong; Lesage, Kevin L.; Wynnyk, Kyle G.; Xiao, Ye; Biesinger, Mark C.; Hill, Josephine M.; Marriott, Robert A.

doi:10.1016/j.cartre.2022.100243

Cited by 2 publications

(1 citation statement)

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“…The IAST model was used in this work to estimate the adsorption of a CH 4 /CO 2 /H 2 S mixture at various pressures. The IAST model is often insufficient for modeling at higher pressures or in systems where the strength of the intermolecular forces of the adsorbates are too dissimilar. − While the IAST calculations agree with the correlations in Figure , there are no experimental multicomponent adsorption results to validate the IAST calculations.…”

Section: Results and Discussionmentioning

confidence: 96%

Sour Gas Adsorption on Silica Gels

et al. 2023

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One of the essential factors for water adsorption on silica gels is the concentration of silanol groups on the silica surface. However, no systematic investigation on the adsorption of sour gas components, methane (CH 4 ), carbon dioxide (CO 2 ), and hydrogen sulfide (H 2 S) on silica gels with different textural properties and surface silanol concentrations, has been conducted. Three silica gels of 22, 30, and 60 Å pore sizes, with silanol concentrations of α total = 2.516, 2.340, and 2.152 OH nm −2 , respectively, were studied in this work. The adsorption data for CH 4 , CO 2 , H 2 S, and H 2 O at T = 0, 25, and 50 °C on the 22 and 30 Å pore size silica gels were presented, and a comparison of the data for the 60 Å pore size silica gel on the same adsorbates was conducted. All three silica gels showed an adsorption affinity in the order of H 2 O > H 2 S > CO 2 > CH 4 . The isosteric heats of adsorption of H 2 O and H 2 S had a greater dependence on the silanol concentration than CO 2 and CH 4 . At p < 10 bar, there was no difference in the adsorption per m 2 of CH 4 between the silica gels (n ads = 1.7 mmol m −2 , for all silicas at p = 10 bar), while higher pressures resulted in greater adsorption capacity in the larger pore volume silica gels (at p = 20 bar: n ads = 3.0, 3.3, and 3.4 mmol m −2 for the 22, 30, and 60 Å pore size silicas, respectively). H 2 S adsorption at low pressures (p < 4 bar) was larger on the samples with larger silanol concentrations (at p = 3 bar: n ads = 6.1, 4.7, and 4.5 mmol m −2 for the 22, 30, and 60 Å pore size silicas, respectively), but above p = 4 bar, the 60 Å pore size silica had a greater adsorption capacity than the 30 Å pore size (at p = 5 bar: n ads = 8.0, 6.0, and 6.2 mmol m −2 for the 22, 30, and 60 Å pore size silicas, respectively).

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Section: Results and Discussionmentioning

confidence: 96%