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 |
|---|---|
| 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 Duration: 19 Jul 2015 → 22 Jul 2015 |
Conference
| Conference | Healthy Buildings 2015 |
|---|---|
| Abbreviated title | HB 2015 |
| Country | United States |
| City | Boulder |
| Period | 19/07/15 → 22/07/15 |
Keywords
- Air cleaning
- Carbon capture
- Climate change and indoor air
Cite this
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Controlling indoor CO2 with a solid sorbent : Kinetics and capacity. / Gall, Elliott T.; Chang, Victor W.C.; Nazaroff, William W.
Proceedings of the Healthy Buildings 2015: America Conference - Innovation in a Time of Energy Uncertainty and Climate Adaptation. 2015. p. 474-477.Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other
TY - GEN
T1 - Controlling indoor CO2 with a solid sorbent
T2 - Kinetics and capacity
AU - Gall, Elliott T.
AU - Chang, Victor W.C.
AU - Nazaroff, William W.
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
KW - Air cleaning
KW - Carbon capture
KW - Climate change and indoor air
UR - http://www.scopus.com/inward/record.url?scp=84992055706&partnerID=8YFLogxK
M3 - Conference Paper
SP - 474
EP - 477
BT - Proceedings of the Healthy Buildings 2015: America Conference - Innovation in a Time of Energy Uncertainty and Climate Adaptation
ER -