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Solid-gas reactions: Study of sulphation of limestone using thermogravimetry

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Abstract

Comparative data are presented on the absorption rate and capacity for SO2 capture by a natural Polish limestone with and without sodium chloride additive. Two sets of experiments were carried out, under dry and wet conditions during limestone calcination and sulphation.

The presence of water vapour brought about a higher reactivity of the sorbent, probably as a result of an effect on the sintering of lime and through the influence of the CaSO4 layer. Further morphological investigations could provide confirmation of the present hypothesis.

Zusammenfassung

Absorptionsgeschwindigkeit und -kapazität für SO2 an einem polnischen Kalkstein mit oder ohne NaCl-Zusatz werden verglichen. Zwei Reihen von Experimenten wurden in trockener bzw. wasserdampfhaltiger Atmosphäre bei der Calcination und Sulfatbildung durchgeführt. In Gegenwart von Wasserdampf wird die Reaktivität des Absorbens infolge Sinterung des Kalks und trotz des Einflusses der CaSO4-Schicht erhöht. Künftige morphologische Untersuchungen sollen diese Hypothese eventuel bestätigen.

Резюме

Представлены сравни тельные данные о скор ости и количестве поглоще ния двуокиси серы природным польс ким известняком в при сутствии добавки хлориастого натрия и без него. Обжиг и поглощение дв уокиси серы были пров едены в сухой и влажной атмос ферах. Присутствие паров во ды вызывает более выс окую реакционную способн ость сорбента, вероятно, вследствии спекания извести и вл ияния образующегося слоя с ульфата кальция. Дальнейшие морфолог ические исследовани я могут дать подтверждение выдви нутой гипотезе.

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References

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The author would like to thank Prof. E. M. Bulewicz of this Institute for valuable discussions, and Mr. W. Balcerowiak for making available the facilities of the Laboratory of the Institute of Heavy Organic Synthesis in Kędzierzyn-Koźle.

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Wieczorek-Ciurowa, K. Solid-gas reactions: Study of sulphation of limestone using thermogravimetry. Journal of Thermal Analysis 33, 407–411 (1988). https://doi.org/10.1007/BF01913915

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  • DOI: https://doi.org/10.1007/BF01913915

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