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:3/23/2017)... March 23, 2017 The report "Gesture Recognition and Touchless ... and Geography - Global Forecast to 2022", published by MarketsandMarkets, the market is ... of 29.63% between 2017 and 2022. Continue Reading ... ... ...
(Date:3/20/2017)... , March 20, 2017 At this year,s ... -based biometrics manufacturer DERMALOG. The Chancellor came to the DERMALOG stand ... is this year,s CeBIT partner country. At the largest German biometrics ... in use: fingerprint, face and iris recognition as well as DERMALOGĀ“s multi-biometrics ... ...
(Date:3/9/2017)... MOUNTAIN VIEW, Calif. , March 9, ... Simple," and 23andMe , the leading personal genetics ... choices.  Zipongo can now provide customers with personalized nutrition ... goals and biometrics, but also genetic markers impacting how ... Zipongo,s personalized food decision support platform uses biometrics ...
Breaking Biology News(10 mins):
(Date:3/23/2017)... 23, 2017 In today,s pre-market ... in the Biotech industry: Sangamo Therapeutics Inc. (NASDAQ: SGMO), ... MKT: SYN), and Regulus Therapeutics Inc. (NASDAQ: ... Credit Suisse upgraded its rating on Pharmaceuticals/Biotechnology to "Overweight" from "Market Weight." ... report at: ...
(Date:3/22/2017)... ... March 22, 2017 , ... Researchers ... from small lab samples to full-size tissues, bones, even whole organs to implant ... system that delivers blood deep into the developing tissue. , Current bioengineering ...
(Date:3/22/2017)... -- Good Start Genetics, a leading family genomics company, ... covered lives mark through its most recent payor addition, ... . With newly signed contracts nationally and others in ... acceptance based on the quality of its science, the ... industry-leading customer care and support and its published cost-effectiveness ...
(Date:3/22/2017)... The global chronic kidney disease ... by Transparency Market Research (TMR). The top four players, ... Inc., accounted for a share of only 41.4% in ... market are focusing aggressively on mergers, acquisitions, and strategic ... to lead to market consolidation in the next few ...
Breaking Biology Technology:
Cached News: