Researchers at the Ruhr-Universität Bochum have found a way to turn climate-damaging CO2 into an alcohol that could serve as a raw material for the chemical industry – without producing large amounts of salt waste that usually arise.
The reaction mechanism is described by the team around Timo Wendling and Prof Dr Lukas Goossen together with a colleague of the Technical University of Kaiserslautern in the journal “Chemistry – A European Journal”.
Converting carbon dioxide into an alcohol without causing unwanted waste products requires a two-step reaction. The problem: For energy reasons, the two partial reactions are virtually impossible to reconcile. In order to make the processes compatible from a thermodynamic point of view, suitable catalysts are needed to facilitate the partial reactions.
The team tested numerous substances and finally found two catalysts that had the required properties: a copper compound for the first reaction step and a rhodium/molybdenum compound for the second step. The exact composition and quantity of solvent in which the reaction took place was also crucial.
This is how the reaction works
In the first partial reaction, called carboxylation, the researchers coupled CO2 to a hydrocarbon compound. For this purpose, a proton (H+) is released from the hydrocarbon compound; the CO2 molecule docks at the vacant site, which results in an acid. The excess proton is taken up by a base. In the second step, called hydrogenation, the acid is converted to an alcohol through a transfer of protons. The base releases the previously taken proton and is thus recycled.
The team demonstrated the feasibility of this reaction with the hydrocarbon compound phenylacetylene. Further studies must show whether the principle can also be extended to other organic compounds.
With this catalyst system, the researchers achieved a recycling rate of 40 percent for the base. “This shows that the base is not destroyed during the reaction, but that the process must still be significantly improved to become usable on an industrial scale,” says Lukas Goossen, a member of the Excellence Cluster Ruhr Explores Solvation, Resolv in short. “We have taken a first important step towards harnessing CO2 for the chemical industry, which would be a great economic and environmental advantage.”
Learn more: Carbon dioxide as a raw material
The Latest on: CO2 to alcohol
via Google News
The Latest on: CO2 to alcohol
- Three companies are setting the pace in an emerging green-energy industryon November 28, 2019 at 4:00 am
It helps that vodka, consisting of alcohol and water, is the simplest spirit to make ... Right now beverage makers and oil companies are among the biggest commercial users of carbon dioxide, and they ...
- How to Keep Your Pet Safe this Thanksgivingon November 27, 2019 at 2:55 pm
When a dog or cat ingests raw bread dough, the yeast continues to convert the sugars in the dough to carbon dioxide gas and alcohol. This has the potential to result in a bloated, drunken pet, which ...
- Watching your sugar intake? Toast to dry wineon November 27, 2019 at 12:11 am
Ripening grapes have two fermentable sugars: fructose and glucose, in about equal amounts. During fermentation, the yeast converts these sugars to alcohol and carbon dioxide. As the alcohol level ...
- Brendan Fevola reflects on 21 years since he was drafted to the AFLon November 26, 2019 at 5:40 pm
31 AM Wife of Shark Tank's Kevin O'Leary had 'alcohol on her breath' on night of ... - Wednesday 27th November 2019 03:31 AM UPDATE 1-China says CO2 border tax will damage global climate change ...
- Gathering to remember the deadon November 22, 2019 at 11:24 am
But the product brought out by Air Co. is actually carbon negative, removing a pound of CO2 for every bottle it produces Source: AirCompany Instagram page Vodka is being made from air. A start-up ...
- CBD Oil UK | We reviewed the 10 best CBD oils in the UKon November 21, 2019 at 6:34 am
CO2 Extraction: By using high pressured carbon dioxide ... Solvent Extraction: After the plant is saturated in a solvent, like grain alcohol, butane, propane or ethanol, the solvent is dissolved. What ...
- Cold Drinks Market Report Highlights Sales Volume...on November 21, 2019 at 1:10 am
Cold drinks are composed of carbohydrates, alcohol, phosphate ions, and carbon dioxide. They are generally acidic in nature because of the presence of citric acid and phosphoric acid. The factors that ...
- Air Co launches as "world's first carbon-negative vodka"on November 20, 2019 at 1:30 pm
Brooklyn company Air Co has developed a process for making vodka that converts carbon dioxide into alcohol. Air Co claims the spirit is "the world's first carbon-negative vodka". "We invented a way to ...
- Metodo Classico, Your Next Italian Sparkling Wine (That Isn’t Prosecco)on November 20, 2019 at 2:58 am
Yeast and sugar are added to still wine, which is bottled with a crown cap. The yeast then ferments the sugar into alcohol, creating bubbles that contain naturally occurring carbon dioxide. The wine ...
via Bing News