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3 Physicochemical Problems of Mineral Processing

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Application of modified calcium sorbents in carbonate looping

Kotyczka-Moranska M., Tomaszewicz G.

Physicochemical Problems of Mineral Processing

2014

Vol. 50, iss. 1

217--224

Reduction of CO2 emission is essential. In this paper, a study of the behaviour of modified Polish CaO-based sorbents during calcium looping cycles has been discussed. All the related tests were conducted using the Netzsch STA 409PG Luxx thermogravimetric analyser. Samples with a weight of ms=10.0±0.1 mg were placed in an Al2O3 crucible. The calcium looping processes were performed at the carbonation temperature of 650°C and the calcination temperature of 900°C. Additionally, calcinationcarbonation cycles with different gas flows were examined. The authors investigated the influence of CO2 concentration and total gas flow on the carbonation conversion. Sorbents were studied by TG and porosimetry analysis.

Application of polish calcium sorbents in carbonate looping

Kotyczka-Moranska M., Tomaszewicz G.

Physicochemical Problems of Mineral Processing

2013

Vol. 49, iss. 1

111--120

The purpose of this work was the investigation of behaviour of three Polish CaO-based sorbents during calcium looping cycles. All investigations were conducted with a Netzsch STA 409PG Luxx thermogravimetric analyser. Samples weighing ms = 10.0(1) mg were placed in an Al2O3 crucible. The calcium looping processes were performed at two carbonation temperatures (650°C and 680°C) and three calcination temperatures (880°, 900° and 920°C). Additionally, calcination-carbonation cycles with different gas flows were explored. We investigated the influence of CO2 concentration and total gas flow on carbonation conversion.

Comparison of different methods for enhancing CO2 capture by CaO-based sorbents. Review

Kotyczka-Moranska M., Tomaszewicz G., Labojko G.

Physicochemical Problems of Mineral Processing

2012

Vol. 48, iss. 1

70-90

CaO-based sorbent looping cycle, i.e. cyclic calcination/carbonation, is one of the most perspective technologies for CO2 capture during coal combustion and gasification processes. This study deals with different methods of enhancing CaO based sorbents activity. We also present the results of our research on the use of dolomite from Siewierz and limestone from Czatkowice. The limestone carbonation conversion in the initial cycles is worse than pure CaO, but its carbon dioxide capture parameters are better than the parameters of dolomite. Sintering appears to play a significant role in the decay of CaO-based sorbents. The annealing effect for different sorbents was investigated. Tests were performed for calcium acetate, calcium hydroxide, dolomite from Siewierz and pure CaO.