I have used the above material (samarium-doped ceria), in combination with molte
ID: 1843830 • Letter: I
Question
I have used the above material (samarium-doped ceria), in combination with molten salts, to selectively separate carbon dioxide (CO2) from other gases. A target steady-state flux of CO2 is 0.1 mg CO2 cm-2 s-1. Consider the following. The United States’ Environmental Protection Agency (EPA), under the new Clean Power Plan legislation, may require coal-fired power plants to eliminate or capture up to half (50%) of their carbon dioxide emissions. The Navajo Generating Station in Page, AZ, a 2 GW coal-fired power plant, emits roughly 500 kg CO2 per second How much surface area (in m2) of the above membrane material would be necessary to meet the above regulatory requirement? Reflect on the magnitude of the number.
Explanation / Answer
to capture 50% of 500kg CO2 produced per second, we need to target 250 kg of CO2 per second elimination = 250 x106 mg require 250 x106/0.1 g x (1 x10-4 m2) = 250,000 m2 membrane area
The area required is very high also consider that this is per second requirment. Secondly to maitaining molten salts in such large area also would be requiring addtional costs and services. Overall economy will be a challenge.
0.1 mg Requires 1 cm2 area = (1 x10-4 m2) of membraneto capture 50% of 500kg CO2 produced per second, we need to target 250 kg of CO2 per second elimination = 250 x106 mg require 250 x106/0.1 g x (1 x10-4 m2) = 250,000 m2 membrane area
The area required is very high also consider that this is per second requirment. Secondly to maitaining molten salts in such large area also would be requiring addtional costs and services. Overall economy will be a challenge.