I D
× COMMENTARYEDITOR'S PAGECOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical EngineeringChementator briefs
Toxicology testing The world’s first toxicology-testing strategy without animal testing…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENVIRONMENTAL MANAGEREQUIPMENT & SERVICESFOCUS
Focus on Software
Enterprise-level software simplifies data management Last month, this company launched…
NEW PRODUCTS + Show More SHOW PREVIEWS

Comment PDF uncategorized

Facts At Your Fingertips: Adsorption bonding

By Scott Jenkins |

Physical adsorption phenomena play a critical role in many separation and purification processes, including separations of industrial gases, purification of gases, moisture removal from fluids, water purification and others. Adsorption is a surface phenomenon in which a fluid (gas or liquid) molecule attaches to the surface of a material by physical forces known as Van der Waals interactions. This one-page reference discusses the nature of Van der Waals forces, and their role in adsorption processes, with a focus on London dispersion forces. Van der Waals forces Van der Waals forces is a general term that describes the relatively weak (compared to typical covalent bond strengths) intermolecular forces that result from individual electrostatic attractions between otherwise non-attracting atoms and molecules. Van der Waals interactions can be classified into three categories, as follows: Hydrogen bonds. Hydrogen bonds form between H atoms — that acquire significant positive charge from being bound to electronegative elements — and negatively charged lone electron pairs on adjacent molecules. The most important H-bonds form with hydroxide and amide groups. Hydrogen bonds have strengths ranging from 5 to 50 kJ/mol. Dipole-dipole…
Related Content
A new method to study nanoparticles
Researchers from the Singapore-MIT Alliance for Research and Technology (Singapore; https://smart.mit.edu) have discovered a way to study the properties of…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Steel Belt Units for Medical Membranes
Upstream Oil & Gas: Automation intelligence from wellhead to distribution
Video - CoriolisMaster
Video - Do you really need a thermowell?
The influence of IIoT in the dewatering process step of pigment production

View More