Carbonate weathering data from reactor experiments under a range of CO2 partial pressures (NERC Grant NE/P019730/2)
The data deposit includes results from 12 experiments that reacted carbon dioxide, seawater and limestone as a method of CO2 sequestration (as xlsx files). The data were obtained by Dr Huw Pullin, Cardiff University as part of a UKRI funded research project. Experiments were conducted under controlled temperatures (20degC), and CO2 pressures (5 and 50% v/v at 1 atm). The methods used are described in Xing et al., 2022 Chemical Engineering Journal. 431. 134096 DOI: 10.1016/j.cej.2021.134096
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Heriot-Watt University
Phil Renforth
School of Engineering and Physical Sciences,
Edinburgh,
EH14 4AS
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British Geological Survey
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The weathering reaction occurred in a glass reactor vessel of volume 18 L consisting of a packed bed layer a bubble column layer and the headspace. 1.0 kg of limestone (size 0.5 and 5 mm), were weathered in seawater at 20degC, Seawater was collected from Dunraven Bay, South Wales, UK, and filtered to achieve the salinity of 35%. During the experiments, either ~3.14 L or ~1.57 L was added to maintain a high (~1:4.4) or low (~1:10) volume ratio of liquid to gas, respectively. Pressure in the headspace was maintained at 1 atm. Two different initial gas compositions were used, with 5% and 50 % (v/v) CO2. Composition in the headspace was monitored continuously using a Gem Scientific G110 infrared CO2 analyser (calibrated to ISO17025 ±1% accuracy), and 100 mL liquid was sampled periodically by an external peristatic pump for alkalinity measurement. Xing et al., 2022 10.1016/j.cej.2021.134096
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