Featured Research

from universities, journals, and other organizations

Scrubbing Sulfur: New Process Removes Sulfur Components, Carbon Dioxide From Power Plant Emissions

Date:
August 21, 2009
Source:
DOE/Pacific Northwest National Laboratory
Summary:
Researchers have developed a reusable organic liquid that can pull harmful gases such as carbon dioxide or sulfur dioxide out of industrial emissions from power plants. The process could directly replace current methods and allow power plants to capture double the amount of harmful gases in a way that uses no water, less energy and saves money.

Pacific Northwest National Laboratory scientist David Heldebrant demonstrates how a new process called reversible acid gas capture works to pull more than just carbon dioxide out of power plant emissions.
Credit: DOE/Pacific Northwest National Laboratory

The Department of Energy's Pacific Northwest National Laboratory has developed a reusable organic liquid that can pull harmful gases such as carbon dioxide or sulfur dioxide out of industrial emissions from power plants. The process could directly replace current methods and allow power plants to capture double the amount of harmful gases in a way that uses no water, less energy and saves money.

"Power plants could easily retrofit to use our process as a direct replacement for existing technology," said David Heldebrant, PNNL's lead research scientist for the project.

Harmful gases such as carbon dioxide or sulfur dioxide are called "acid gases". The new scrubbing process uses acid gas-binding organic liquids that contain no water and appear similar to oily compounds. These liquids capture the acid gases near room temperature. Scientists then heat the liquid to recover and dispose of the acid gases properly.

These recyclable liquids require much less energy to heat but can hold two times more harmful gases by weight than the current leading liquid absorbent used in power plants. It is a combination of water and monoethanolamine, a basic organic molecule that grabs the carbon dioxide.

PNNL's previous work with the all-organic liquids focused on pulling only carbon dioxide out of emissions from power plants. New work will show how the process can be applied to other acid gases such as sulfur dioxide.

"Current methods used to capture and release carbon dioxide emissions from power plants use a lot of energy because they pump and heat an excess of water during the process," said Heldebrant. He notes the monoethanolamine component is too corrosive to be used without the excess water.

In PNNL's process called "Reversible Acid Gas Capture," the molecules that grab onto the acid gases are already in liquid form, and don't contain water. The acid gas-binding organic liquids require less heat than water does to release the captured gases.

Heldebrant and colleagues demonstrated the process in previous work with a carbon dioxide-binding organic liquid, called CO2BOL. In this process, scientists mix the CO2BOL solution into a holding tank with emissions that contain carbon dioxide. The CO2BOL chemically binds with the carbon dioxide to form a liquid salt solution.

In another tank, scientists reheat the salt solution to strip out the carbon dioxide. Non-hazardous gases such as nitrogen would not be captured and are released back into the atmosphere. The toxic compounds are captured separately for storage. At that point, the CO2BOL solution is back in its original state and ready for reuse.

Heldebrant and colleagues have developed organic liquid systems that bind three additional acid gases found in emissions. He will talk about new work with sulfur dioxide, carbonyl sulfide, and carbon disulfide -- all acid gases that are environmentally harmful -- at the American Chemical Society Fall 2009 Meeting and Exposition, Tuesday, August 18, at 4:30 p.m. EDT.

This work is supported by Pacific Northwest National Laboratory's Energy Conversion Initiative, an ongoing research and development effort focused on finding new ways to deliver clean and safe energy.


Story Source:

The above story is based on materials provided by DOE/Pacific Northwest National Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

DOE/Pacific Northwest National Laboratory. "Scrubbing Sulfur: New Process Removes Sulfur Components, Carbon Dioxide From Power Plant Emissions." ScienceDaily. ScienceDaily, 21 August 2009. <www.sciencedaily.com/releases/2009/08/090818083226.htm>.
DOE/Pacific Northwest National Laboratory. (2009, August 21). Scrubbing Sulfur: New Process Removes Sulfur Components, Carbon Dioxide From Power Plant Emissions. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2009/08/090818083226.htm
DOE/Pacific Northwest National Laboratory. "Scrubbing Sulfur: New Process Removes Sulfur Components, Carbon Dioxide From Power Plant Emissions." ScienceDaily. www.sciencedaily.com/releases/2009/08/090818083226.htm (accessed July 30, 2014).

Share This




More Matter & Energy News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Britain Testing Driverless Cars on Roadways

Britain Testing Driverless Cars on Roadways

AP (July 30, 2014) British officials said on Wednesday that driverless cars will be tested on roads in as many as three cities in a trial program set to begin in January. Officials said the tests will last up to three years. (July 30) Video provided by AP
Powered by NewsLook.com
China's Drone King Says the Revolution Depends on Regulators

China's Drone King Says the Revolution Depends on Regulators

Reuters - Business Video Online (July 30, 2014) Comparing his current crop of drones to early personal computers, DJI founder Frank Wang says the industry is poised for a growth surge - assuming regulators in more markets clear it for takeoff. Jon Gordon reports. Video provided by Reuters
Powered by NewsLook.com
Climate Change Could Cost Billions, According To White House

Climate Change Could Cost Billions, According To White House

Newsy (July 29, 2014) A report from the White House warns not curbing greenhouse gas emissions could cost the U.S. billions. Video provided by Newsy
Powered by NewsLook.com
Stranded Whale Watching Boat Returns to Boston

Stranded Whale Watching Boat Returns to Boston

Reuters - US Online Video (July 29, 2014) Passengers stuck overnight on a whale watching boat return safely to Boston. Linda So reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins