A Microalgae-Based Platform for the Beneficial Re-use of Carbon Dioxide Emissions from Power Plants

Crocker, Mark; Groppo, J.G.; Kesner, Stephanie; Mohler, Daniel; Pace, R.S.; Santillan‐Jimenez, Eduardo; Wilson, Michael; Schambach, Jenna Y.; Stewart, Jennifer J.; Zeller, Ashton

doi:10.2172/1419316

Cited by 4 publications

(3 citation statements)

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“…In order to quantify the energy penalty associated with the increase in cycling frequency required for heating the algae culture, the feed pump work duty was first calculated for the base case, i.e., cycling every six hours without heating. This was found to be 0.22 MWh day -1 , based on a technoeconomic analysis conducted for a 1 MW coal-fired power plant as reported previously [33]. The feed pump duty associated with increased cycling was then calculated assuming that additional pump requirements would be fulfilled by the installation of multiple, identical pumps.…”

Section: Energy Penaltiesmentioning

confidence: 94%

“…The pump duty associated with taking a slipstream of circulating water to the heat exchanger was calculated, as per Section 3.6. Assumptions for capital cost per square meter and biomass production cost (including OPEX) were taken from Crocker et al [33] and were reported as $70 m −2 and $875 tonne −1 , respectively. These numbers were used as a baseline for comparison of systems with and without heat integration equipment.…”

Section: Techno-economic Analysismentioning

confidence: 99%

“…PBR liquid flow rate 500 L min −1 Crocker et al [33] Required flow rate of circulating water 900 L min −1 Calculated Capital cost of installed PBR 70 $ m −2 Crocker et al [33] Baseline biomass production cost 875 $ tonne −1 Crocker et al [33] Algae growth rate 0.17 g L −1…”

Section: Value Units Sourcementioning

confidence: 99%

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Beneficial Reuse of Industrial CO2 Emissions Using a Microalgae Photobioreactor: Waste Heat Utilization Assessment

et al. 2019

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Microalgae are a potential means of recycling CO2 from industrial point sources. With this in mind, a novel photobioreactor (PBR) was designed and deployed at a coal-fired power plant. To ascertain the feasibility of using waste heat from the power plant to heat algae cultures during cold periods, two heat transfer models were constructed to quantify PBR cooling times. The first, which was based on tabulated data, material properties and the physical orientation of the PBR tubes, yielded a range of heat transfer coefficients of 19–64 W m−2 K−1 for the PBR at wind speeds of 1–10 m s−1. The second model was based on data collected from the PBR and gave an overall heat transfer coefficient of 24.8 W m−2 K−1. Energy penalties associated with waste heat utilization were found to incur an 18%–103% increase in energy consumption, resulting in a 22%–70% reduction in CO2 capture for the scenarios considered. A techno-economic analysis showed that the cost of heat integration equipment increased capital expenditures (CAPEX) by a factor of nine and increased biomass production costs by a factor of three. Although the scenario is thermodynamically feasible, the increase in CAPEX incurs an increase in biomass production cost that is economically untenable.

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Section: Energy Penaltiesmentioning

confidence: 94%

Section: Techno-economic Analysismentioning

confidence: 99%