HOME >> BIOLOGY >> NEWS
Chemists Discover New Processes In Fuel-Cleaning Catalysis

Researchers have discovered two pieces of a scientific puzzle in the most widely used process for removing polluting sulfur compounds from crude oil. The discovery could help chemists tailor the catalytic process, known as hydrodesulfurization, for maximum efficiency and economy, according to Paul S. Weiss, professor of chemistry at Penn State, who conducted the research along with Penn State graduate student James G. Kushmerick.

A paper describing the research is published in the current issue of Journal of Physical Chemistry B, published on December 10.

The chemists made their discovery with one of the most powerful and stable microscopes in the world--an instrument they designed and built themselves. "It is so stable that the position we examine drifts no more than one atomic site per day, so we are able to observe individual molecules for days at a time and to measure the electronic structures that control chemical reactions on surfaces," says Weiss.

The chemists observed a cluster of three nickel atoms and its interaction with a molybdenum disulfide surface. Tiny molybdenum disulfide crystallites on an oxide base--with nickel or cobalt added as a reaction promoter--are used by refineries worldwide as catalysts for removing sulfur-containing thiophene compounds from crude oil.

"We were amazed to discover how mobile the nickel atoms were even well below room temperature," says Kushmerick, who had to cool his specimen down to just 4 (degrees) Kelvin above absolute zero and keep it sealed inside his microscope's vacuum chambers to keep the nickel atoms from skimming around the surface in a blur. "Because the bonds of the molybdenum disulfide are already saturated, there is nothing really to hold the nickel firmly in place," Weiss explains. The chemists found that, at 4K, the nickel atoms were so loosely bound they were easy to move around with the fine tip of their microscope's needle.

Before this research, it was known that
'"/>

Contact: Barbara Kennedy
science@psu.edu
814-863-4682
Penn State
11-Dec-1998


Page: 1 2 3

Related biology news :

1. Chemists at four pharmaceutical companies named Heroes for treating childhood conditions
2. Chemists unlock secret to activating tumor suppressor gene
3. Chemists create unusual lariat RNA, a key intermediate in biological splicing
4. American Institute of Chemists names Ralph Hirschmann AIC Gold Medalist
5. Chemists explore the shape of the key that signals cell division in cancer cells
6. Nanoencapsulation: Chemists at TSRI discover a new and simple way of controlling reactions
7. Chemists characterize regulators of zinc intake and export in cells
8. Chemists spin materials to improve magnetic resonance data
9. Chemists describe "zipper teeth" of DNA molecules -- publish results in the journal Nature
10. Chemists report new approach to synthetic fragments of medically important Heparin
11. Chemists hold national meeting August 22-26

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/20/2017)... 2017 PMD Healthcare announces the release of ... Management System (WMS), a remote, real-time lung health monitoring ... Healthcare is a Medical Device, Digital Health, and Chronic ... creating innovative solutions that empower people to improve their ... PMD developed the first ever personal spirometer, Spiro PD, ...
(Date:3/9/2017)... March 9, 2017 4Dx has publicly released ... Imaging Workshop at the University of Pennsylvania. Founder and ... deliver the latest data to world leaders in lung ... together leaders at the forefront of the industry to ... "The quality of the imaging is ...
(Date:3/7/2017)...   HireVue , the leading provider of video ... best talent, faster, today announced the additions of ... Diana Kucer as Chief Marketing Officer (CMO). ... poised to drive continued growth in the company,s new ... record bookings in 2017. "Companies worldwide turn ...
Breaking Biology News(10 mins):
(Date:4/21/2017)... ... 2017 , ... Having worked on the design of the innovative Triton™ ... to top lab design architects from around the country at the Lab Design Conference ... and Engineering Greg Casey will be at the show, where they will highlight the ...
(Date:4/21/2017)... ... April 21, 2017 , ... The AMA is happy to announce ... from across the nation. The scholarships are created through funds donated by model aviation ... criteria are set by the AMA Scholarship Committee, which is made up of model ...
(Date:4/20/2017)... ... April 20, 2017 , ... As part ... will explore challenging patient cases when screening for direct oral anticoagulant. When patients ... a need for bridging parental anticoagulation especially for those at high risk of ...
(Date:4/20/2017)... ... , ... USDM Life Sciences , the leading risk management, technological innovation ... to announce Holger Braemer as Vice President of its Europe division and ... , Braemer is an integral part of USDM’s expansion of services and solutions ...
Breaking Biology Technology:
Cached News: