Abstract
Absent unvented combustion, in occupied indoor spaces, CO2 concentrations depend primarily on three factors: Outdoor CO2 concentrations, CO2 emission rates from human metabolism, and the outdoor-air ventilation rate. Indoor CO2 levels are generally managed by means of dilution with outdoor air. In this work, we investigate an alternative approach to controlling indoor CO2: Active removal using a solid sorbent. We report parameterizations of chemical kinetics and uptake capacity to soda-lime sorbent across a range of conditions relevant to indoor environments. Reaction rate constants for the interaction of Ca(OH) 2 present in soda-lime and CO2 range from 1.8×10-2 to 1.5×10-1 m2 mol-1 s-1, increasing with higher relative humidity (RH). Uptake capacities range from 0.04 to 0.36 g CO2/g sorbent, also increasing with higher RH. These data facilitate assessment of the technical feasibility of soda-lime scrubbers in buildings as an option for controlling indoor CO2.
Original language | English |
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Title of host publication | Proceedings of the Healthy Buildings 2015: America Conference - Innovation in a Time of Energy Uncertainty and Climate Adaptation |
Pages | 474-477 |
Number of pages | 4 |
Publication status | Published - 2015 |
Externally published | Yes |
Event | Healthy Buildings 2015: America Conference - Innovation in a Time of Energy Uncertainty and Climate Adaptation - Boulder, United States of America Duration: 19 Jul 2015 → 22 Jul 2015 |
Conference
Conference | Healthy Buildings 2015 |
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Abbreviated title | HB 2015 |
Country | United States of America |
City | Boulder |
Period | 19/07/15 → 22/07/15 |
Keywords
- Air cleaning
- Carbon capture
- Climate change and indoor air