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People say we're running out of energy. That's only true if we stick with these old 19th century technologies. We are awash in energy from sunlight.

 

Ray Kurzweil

 

Carbon dioxide from exhaust fumes used to make new chemicals

RATE THIS! +27
Posted in Science on 17th Feb, 2014 04:45 AM by AlexMuller

To stop global warming, governments are advocating reducing the amount of greenhouse gas put into the atmosphere. But some argue that such action won’t be enough, we will need to remove CO2 already present. Reduction of CO2 is a big challenge and requires large amounts of renewable energy.

 

Until then, short-term solutions to remove CO₂ from fossil fuel power plants is becoming necessary, including carbon capture and storage (CCS). The other option is to use the storage part, as new research from Korea shows, and to use CO₂ directly from exhaust gases to make new chemicals.

 
Carbon capture involves the “capture” of CO2, either by a chemical or physical process. Often CO2 from a exhaust gas stream is captured by nitrogen containing compounds called amines. The reaction results in the formation of solid chemicals. These can be heated, allowing the CO2 to be released, which can then be compressed, transported and stored in geological features, such as depleted oil fields, or used as raw material in chemical factories.
 
Although trees and some microbes can capture CO2 and use it as fuel, humans have struggled to replicate the process on a large scale. Most chemical reactions involving CO2 require expensive catalysts, high temperatures, or high pressures to make it react. The most common use of CO2 as a chemical feedstock is in the formation of urea, which is found in around 90% of the world’s fertilisers.
 
In the new research, published in the journal Angewandte Chemie, Soon Hong and colleagues from the Institute for Basic Science in South Korea have caught CO2 from exhaust gas and used it for many reactions that make useful chemicals. One type is called alkynyl carboxylic acid, which has many uses such as making food additives. The other, cyclic carbonate, is used to make polymers for cars and electronics.
 
Cyclic carbonates can also be used in place of phosgene, which is a very reactive and highly toxic chemical that is used as a starting material to make a wide variety of useful products.

Tags: CO2climate changeglobal warmingexhaust

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Comments

Author: Guest
Posted: 2014-02-17
+2
This is certainly a good direction to take in handling CO2. If one can remove it and then make some useful compounds out of it - that would be very useful and helpful to the environment. One important issue here is the energy and cost for this process Reply
Author: Guest
Posted: 2014-02-17
+0
They state that this work shows that CO₂ can be used as a viable alternative to carbon monoxide in carbonylation reactions and increasing the importance of CO₂ in the chemical industry. I guess this can be developed further Reply
Author: Guest
Posted: 2014-02-17
+2
Tackling climate change needs many approaches. Furthermore they have to be assessed very carefully as making any mistakes would be catastrophic
2 Replies
Author: Guest
Posted: 2014-02-17
+1
One attempt to reverse the impacts of global warming is by injecting reflective particles into the stratosphere; however, this could make matters worse, as reported recently Reply
Reply
Author: Guest
Posted: 2014-02-17
+1
The reality is that the climate is changing. It’s going to continue to happen, and it’s going to be part of everyday life for centuries to come — perhaps longer than that.
1 Replies
Author: Guest
Posted: 2014-02-17
+0
Global warming is well known-the rise in the average temperature of Earth's atmosphere and oceans was observed from the late 19th century and is projected to continue Reply
Reply
Author: Guest
Posted: 2014-02-17
+1
While most climate scientists believe the human release of greenhouse gases has made immense changes in the earth inevitable, they hope many of these will happen slowly enough that society can adapt.
1 Replies
Author: Guest
Posted: 2014-02-17
+0
This could seem comforting. The fact that there is no global catastrophe looming in the near future is a good news, however could send a wrong message. Nasty climate surprises have occurred already, and more seem inevitable, perhaps within decades Reply
Reply


 

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