Given that the global energy sector is already straining to meet booming demand for electricity, it’s hard to believe that the United States, or any other country that relies on coal-fired generation, will agree to reduce the output of its coal-fired plants by almost a third in order to attempt carbon capture and sequestration.

Image Credit... Vivienne Flesher

Here’s the second problem. The Pacific Northwest National Laboratory has estimated that up to 23,000 miles of new pipeline will be needed to carry the captured carbon dioxide to the still-undesignated underground sequestration sites. That doesn’t sound like much when you consider that America’s gas pipeline system sprawls over some 2.3 million miles. But those natural gas pipelines carry a valuable, marketable, useful commodity.

By contrast, carbon dioxide is a worthless waste product, so taxpayers would likely end up shouldering most of the cost. Yes, some of that waste gas could be used for enhanced oil recovery projects; flooding depleted oil reservoirs with carbon dioxide is a proven technology that can increase production and extend the life of existing oilfields. But the process would be useful in only a limited number of oilfields — probably less than 10 percent of the waste carbon dioxide captured from coal-fired power plants could actually be injected into American oilfields.

The third, and most vexing, problem has to do with scale. In 2009, carbon dioxide emissions in the United States totaled 5.4 billion tons. Let’s assume that policymakers want to use carbon capture to get rid of half of those emissions — say, 3 billion tons per year. That works out to about 8.2 million tons of carbon dioxide per day, which would have to be collected and compressed to about 1,000 pounds per square inch (that compressed volume of carbon dioxide would be roughly equivalent to the volume of daily global oil production).

In other words, we would need to find an underground location (or locations) able to swallow a volume equal to the contents of 41 oil supertankers each day, 365 days a year.