Abstract Mixing hydrocarbon surfactants with fluorocarbon is still an important strategy to improve the economic benefits and performances of expand their range application. Herein, we prepared a novel kind hydrocarbon-fluorocarbon surfactant mixtures via mixing cationic surfactant, cetyltrimethylammonium bromide (CTAB), tri-block nonionic short-chain (F 9 EG 13 F ) in aqueous solution. The res...

the thermal diffusion factor, at, for a binary gas mixture is calculated on the basis of nonequilibrium thermodynamics. a new formula for at is derived and this factor is given for several paris of gases according to this formula.

in hard disk drives (hdd), it is necessary to decrease the flying height (fh) between the head and the disk (currently, fh is around 3-5 nm) so as to increase recording densities. retaining the solid lubricant has become a difficult proposition owing to intermittent contact between the surfaces. ztmd and z are used as solid lubricant to lubricate these interfaces. in this paper, the behavior of...

Hydrocarbon profiles on the cuticle of social insects act as multi-component recognition cues used to identify membership in a species, a colony or, within colonies, cues about its reproductive status or task group. To examine the role of structural complexity in ant hydrocarbon recognition cues, we studied the species recognition response of two ant species, Linepithema humile and Aphaenogaste...

Biodegradation of a model mixture of hydrocarbon (dodecane and hexadecane, 1:1 w/w), as well as hydrocarbon emulsified by synthetic and natural emulsifiers, and their mixtures were analyzed in the presence of Pseudomonas spp. and Bacillus spp. bacterial strains. Changes in surface tension were measured by the static and dynamic methods during biodegradation processes. During the biodegradation ...

The objective of the work is to analyze and predict the multiple steady states through dynamic analysis when the reactive distillation column is subject to different input disturbances. The dynamic simulations are carried out to analyze the open loop dynamic responses of the system using step changes in the manipulated variable (reflux ratio, holdup, hydrocarbon mixture feed stage, hydrocarbon ...

The methanol to hydrocarbon process, discovered about 40 years ago, uses zeolites to catalyze the shape selective conversion of methanol to a mixture of hydrocarbons. It has recently gained very much interest, as it allows the conversion of fossil and renewable carbon sources, via synthesis gas and methanol, to a mixture of hydrocarbons. The composition of this hydrocarbon mixture may range fro...

Understanding the composition of complex hydrocarbon mixtures is important for environmental studies in a variety of fields, but many prevalent compounds cannot be confidently identified using traditional gas chromatography/mass spectrometry (GC/MS) techniques. This work uses vacuum-ultraviolet (VUV) ionization to elucidate the structures of a traditionally "unresolved complex mixture" by separ...

The hydroisomerization of pure n-pentane over H-mordenite supported Pt-catalyst was investigated in a fixed bed reactor by changing reaction parameters such as temperature, pressure, and WHSV, as well as the H2/HC ratio. The maximum yield of isopentane over Pt/mordenite catalyst was achieved at 220 °C and a relatively low reaction pressure. To address the effect of feed composition on the catal...