Changes of activated coke properties in cyclic adsorption treatment of flue gases

Jastrząb, K.

doi:10.1016/j.fuproc.2012.06.011

Cited by 24 publications

(20 citation statements)

References 14 publications

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“…Figure 4d shows S 2p XPS spectra of Mn12/AC after desulfurization. S 2p 3 31,32 This indicates that MnO on the surface of activated coke was transformed to MnSO 4 during the desulfurization process. when the ratios of blended MnO 2 in activated coke were higher than 12%.…”

Section: Mnso 4 Production During Desulfurization Processmentioning

confidence: 99%

Effect of MnSO₄ on the Removal of SO₂ by Manganese-Modified Activated Coke

Yang

Jiang

Yang

et al. 2015

Ind. Eng. Chem. Res.

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In this study, the effect of manganese sulfate (MnSO 4 ) on desulfurization capacity was investigated through carrying out consecutive desulfurization−regeneration cycles of MnO 2 -blended activated coke (Mn/AC). It was observed that MnSO 4 was produced on the surface of Mn/AC during the desulfurization process, and the amount of MnSO 4 accumulated on Mn/AC first increased significantly and then became relatively stable. In addition, the desulfurization results of MnSO 4 -impregnated Mn/AC indicate that Mn 2+ from MnSO 4 could form new liquid-phase catalysis, which existed with the solid-phase catalysis (blended MnO 2 ) simultaneously in the desulfurization system. However, an excessive amount of MnSO 4 over the surface of activated coke can block the access of SO 2 to the pore network, hampering the activity of the solid-phase catalyst and, consequently, resulting in a decrease of desulfurization capacity.

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Section: Mnso 4 Production During Desulfurization Processmentioning

confidence: 99%

Effect of MnSO₄ on the Removal of SO₂ by Manganese-Modified Activated Coke

Yang

Jiang

Yang

et al. 2015

Ind. Eng. Chem. Res.

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“…3. 6,40 The absorption peak at 1400 cm À1 was assigned to the C-H stretch in -CH 2or -CH 3 . 38,39 The band located at 1628 cm À1 was detected, which was caused by the presence of the C]O stretching vibration of different functional groups, including quinones and lactones.…”

Section: Surface Functional Groups On Activated Cokementioning

confidence: 99%

“…1 The emission of SO 2 in China has caused many serious environmental pollution and human health problems, and has also been recognized as one of the main sources of haze pollution. [5][6][7][8] It was reported that desulphurization performance of activated coke mostly depends on its physicochemical characteristics. ), without producing secondary pollutants and being easily regenerated.…”

Section: Introductionmentioning

confidence: 99%

The effects of metal oxide blended activated coke on flue gas desulphurization

et al. 2016

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The objective of this study was to investigate the possibility of using some natural minerals or industrial waste containing some metal oxides to prepare modified activated coke (M/AC) for flue gas desulphurization. The metal oxides, i.e. Fe 2 O 3 , Co 2 O 3 , CuO and Ni 2 O 3 , were used as additives to prepare M/AC by a blending method. The results show that the M/AC could effectively improve desulphurization performance, and the highest sulphur capacity was obtained at 143 mg g À1 for the Ni/AC sample with a blending ratio of 12 wt%, which was higher than that of the blank sample (97 mg g À1 ). The addition of metal oxides by the blending method could affect the textural properties of M/AC evidently and the influence was different with different metal oxides and blending ratios. On the other hand, M/AC samples have higher contents of oxygen-containing functional groups, with the highest for the Ni/AC sample, and have higher contents of p-p* transition groups, compared with blank activated coke. The metal oxides loaded on the M/AC were mainly transformed to metallic particles during the activation process, and to metal sulfate and partially metal oxides after the desulphurization process. † Electronic supplementary information (ESI) available: Fig. S1 shows the breakthrough curves of the metal oxides for ue gas desulphurization. Fig. S2 shows the overall XPS spectrum of prepared activated coke. Fig. S3 shows the binding energy patterns of C 1s for prepared activated cokes. See

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“…In general, the RCs of oxygen-containing functional groups of ACP-Rn were higher than those of ACP, which is primarily attributed to the high temperature carbon acid reaction, i.e., C + H 2 SO 4 / CO + CO 2 + SO 2 + H 2 O and the pyrolysis of oxygen containing macromolecules during the regeneration. 29,30 On comparing ACP/ACP-Rn before and aer NO removal, it was found that the RCs of C-C showed a certain reduction when the ACP/ACP-Rn was used for NO removal, while the RCs of C-O, C]O and p-p* transition peak mildly increased alternatively. This could be attributed to the adsorbed oxygen, which transformed to radical oxygen and expressed as the increment of oxygen-functional groups.…”

Section: The Continuous Denitrication and Desulfurization Performancementioning

confidence: 99%