Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Chemical industry helped by small invisible tube

25.01.2002


Chemists at Utrecht University have developed a catalyst for fine chemistry. Tiny tubes of graphite are the carrier for this catalyst. PhD student Tijmen Ros successfully tested the catalyst with a standard reaction. Fellow researchers are now making the catalyst suitable for the production of cinnamon alcohol, an aromatic substance and flavouring.



According to the researchers from Utrecht, carbon nanofibres will replace active carbon as a carrier for catalysts. Carbon nanofibres are small tubes made from graphite. Several tubes together from a sponge-like material with a large internal surface. In the optimum case a gram of tubes has a surface area of 200 m2. The researchers fix the catalyst, for example the metal rhodium, to the surface. Many small metal particles can be placed on a large surface and that produces a good catalyst.

Tijmen Ros investigated how effective the catalyst was in the hydrogenation of cyclohexene. Hydrogenation is a widely used reaction in the chemical industry. An example of hydrogenation is the hardening of fat to make butter from vegetable or animal oils. Colourings, aromatic substances and flavourings are also made by means of hydrogenation. Cyclohexene is a simple molecule used by the researchers to test the catalyst.


The catalyst turned out to be so effective that the supply of new hydrogen and not the catalyst was the rate-limiting step in the hydrogenation process.

The researchers first of all tested the carbon nanofibres with pure metal particles and then with metal complexes. Fine chemistry often uses pure metal particles but would rather work with complexes, as these are better at steering the reaction. A complex bound to carbon nanofibres makes it possible to reuse the catalyst. Although the complex used by the chemists appeared to have lost its activity, the researchers expect to be able to make active complexes in the future.

In the meantime, the Utrecht research group is investigating the industrially important hydrogenation of cinnamon aldehyde into cinnamon alcohol, a substance which tastes and smells like cinnamon. Most large companies are waiting until the efficacy of carbon nanofibres as a carrier for catalysts has been proven. The researchers expect that this will be the case within ten years.

Michel Philippens | alphagalileo

More articles from Life Sciences:

nachricht Climate Impact Research in Hannover: Small Plants against Large Waves
17.08.2018 | Leibniz Universität Hannover

nachricht First transcription atlas of all wheat genes expands prospects for research and cultivation
17.08.2018 | Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Smallest transistor worldwide switches current with a single atom in solid electrolyte

17.08.2018 | Physics and Astronomy

Robots as Tools and Partners in Rehabilitation

17.08.2018 | Information Technology

Climate Impact Research in Hannover: Small Plants against Large Waves

17.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>