TG study of sorbent materials for desulfurization of combustion gases at high temperature

Hakvoort, G.; Bleek, C.M. van den; Schouten, J.C.; Valkenburg, P.J.M.

doi:10.1016/0040-6031(87)80247-2

Cited by 17 publications

(6 citation statements)

References 2 publications

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“…These adsorbents were used to separate structural isomers, amino acids and proteins by HPLC (Werber and Carr, 1990;Blackwell and Carr, 1992) and to separate peridines by ligand-exchange gas chromatography (GC) (Fujimara and Ando, 1977). Sol-gel prepared alumina adsorbents have also been employed as flue-gas cleaning adsorbents and proved to be superior to the conventional adsorbents with respect to their chemical and mechanical stability (Hakvoort et al, 1987;Duisterwinkel et al, 1989). To the best of our knowledge, no study was reported on the preparation of adsorbents for the separation of industrially important gases by the sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Sol‐gel preparation and properties of Alumina adsorbents for gas separation

Deng

1995

AIChE Journal

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Section: Introductionmentioning

confidence: 99%

Sol‐gel preparation and properties of Alumina adsorbents for gas separation

Deng

1995

AIChE Journal

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“…Since the introduction of the Shell flue gas desulfurization process (copper oxide process) in the late 1960s (Dautzenberg et al, 1971), a significant amount of work has been done to improve the existing regenerative sorbents or to develop new types of regenerative sorbents for flue gas desulfurization processes (Centi et al, 1990;Cull, 1978;Duisterwinkel et al, 1989;Hakvoort et al, 1987;Hedges and Yeh, 1992;Kiel et al, 1992;Wolff et al, 1993;Yang and Shen, 1979). Different porous materials including γ-alumina, R-alumina, silica, and titania have been applied as the sorbent supports.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Stability, and Sulfation Properties of Sol−Gel-Derived Regenerative Sorbents for Flue Gas Desulfurization

Deng

1996

Ind. Eng. Chem. Res.

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The sol-gel method is applied to prepare γ-alumina-supported copper oxide and calcium oxide sorbents containing 10-50 wt % active species. The prepared sorbents are characterized for their pore texture, dispersion of active species on the surface of support, and desulfurization properties. The sol-gel-derived alumina-supported sorbents have a relatively large surface area (>200 m 2 /g) and pore volume (>0.3 cm 3 /g) and uniform pore size distribution (20-60 Å). Thermal and chemical stability of the sol-gel-derived sorbents is studied by comparing the pore texture data of the sorbents before and after several different heat treatments. The stability results show that the pore structure of the sol-gel-derived sorbents is stable in the normal conditions of the flue gas desulfurization process. It is found that CuO/γ-Al 2 O 3 sorbent containing 20 wt % of CuO coated as a monolayer or submonolayer on the surface of support has the highest SO 2 sorption capacity (22.5 wt % at 500°C). The sol-gel-derived CuO/γ-Al 2 O 3 sorbent exhibits desired sulfation and regeneration properties.

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“…As only one factor is changed, the differences in reactivity may be attributed to the catalytic oxidation of SO2 to SO3, which is in fact the essential sulphating agent. A similar promoting oxidation of SO2, thereby facilitating sulphation (via SO3), was observed when platinum was used as the crucible material for thermogravimetric experiments, but an alternative explanation was offered [9,10].…”

Section: Resultsmentioning

confidence: 81%

“…Thus, moderate solid catalysts for SO2 oxidation have been considered or tested as concerns the sulphation reaction in an oxidizing atmosphere, e. g. Fe203 [6][7][8]. Another good high-temperature catalyst to which little attention has been paid is platinum [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Catalytic sulphation of limestone/lime with platinum

Wieczorek-Ciurowa

1992

Journal of Thermal Analysis

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The effects of the presence of a Pt catalyst on the limestone/lime sulphation process were investigated by thermal analysis methods to provide a better understanding of the factors limiting gas desulphurization when Ca-based sorbents are used. It was found that for the Ptcatalysed sulphation of preealcined limestone the weight increase is above 100% higher under isothermal and dynamic conditions (up to 830~These results are direct evidence that Pt catalyses the CAO-SO2--O2 reaction. It can be presumed that the process proceeds through a gaseous intermediate, SO3, a highly reactive gas, which explains the increased rate of sulphation. SO3 then reacts with CaO to form CaSO4 directly, in contrast with the non-eatalysed oxidation of SO2 to SO3, where CaSO3 formation is the most probable early stage of sulphation. The proposed mechanisms were supported by the phase identification of the products.

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TG study of sorbent materials for desulfurization of combustion gases at high temperature

Cited by 17 publications

References 2 publications

Sol‐gel preparation and properties of Alumina adsorbents for gas separation

Sol‐gel preparation and properties of Alumina adsorbents for gas separation

Synthesis, Stability, and Sulfation Properties of Sol−Gel-Derived Regenerative Sorbents for Flue Gas Desulfurization

Catalytic sulphation of limestone/lime with platinum

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