Helium dimer ion was observed after electron impact ionization of a supersonic expansion helium with translational temperature near 1 mK. The dependence the signal on source pressure, distance from source, and kinetic energy measured. determined to arise neutral dimer.

As an emerging green and sustainable solvent, a deep eutectic solvent (DES) applied to the carbon capture process is considered be promising absorbent. This work aims comprehensively evaluate potential effectiveness of DESs for CO2 capture. First, hydrophobic DES, which composed tetrabutylammonium bromide as hydrogen bond acceptor (HBA) decanoic acid donor (HBD) with molar ratio 1:2, was screened out from 280 by conductor-like screening models–segment activity coefficient (COSMO-SAC) model....

The relative transmissions of helium dimer and atom beams through a set nanoscale sieves were measured as function hole size in the range from 98–410 nm. From transmission coefficients, mean internuclear distance was determined to be 〈r〉=62±10 Å. This enormous bond length—by far largest known—confirms recent theoretical estimates potential energy well depth ε extremely small binding Eb dimer. ranges these parameters corresponding experimental uncertainty 〈r〉 are ε/k=10.88–10.98 K...

For the treatment of toluene exhaust gas, absorption is widely applied because its advantages mature technology and high efficiency, research for development performance absorbents one focuses in this field. Deep eutectic solvents (DESs), which are emerging as efficient green solvents, were introduced absorbent work. The effects structures compositions hydrogen bond acceptors (HBAs) donors (HBDs) on affinities explored. It was found that both HBAs HBDs with longer alkyl chains have higher to...

Considering the separation of 1-butanol and water, extraction has received increasing attention because advantages easy operation low energy consumption. In this work, deep eutectic solvents (DESs) were introduced as hydrophilic for dehydration. The COSMO-SAC model was employed DESs screening, choline chloride–urea 1:2 DES (reline) selected corresponding solvent. Via various quantum chemical methods, hydrogen bonds proven to be main molecular interactions, wherein a stronger interaction in...

Because of the extremely small binding energy helium dimer, nuclear wave function is delocalized over an large range separations. One might therefore expect properties this extraordinary species to be sensitive potential at very internuclear distances, r, where relativistic corrections usual van der Waals interaction may important. We have estimated effect retardation, which changes r−6 dependence r−7 in limit and found that expectation value 〈r〉 are indeed significantly affected by its inclusion.

Ethyl propionate is usually produced from esterification of propionic acid and ethanol in the industry. However, purification ethyl remains a challenge because unreacted forms an azeotrope with propionate. In this work, extractive distillation was adopted, isobutyl acetate chosen as entrainer to separate mixture The vapor–liquid equilibria for binary systems ethanol/ethyl + were measured at atmospheric pressure, experiment data correlated nonrandom two-liquid model, universal quasi-chemical...

Abstract In this paper, a protective sealed Zn coating (SZC) was prepared on sintered NdFeB magnet by the combination of electrodeposition and sol–gel method. The unsealed (UZC) also studied for comparison. surface morphology UZC cross‐section SZC were investigated using scanning election microscope (SEM). microstructure structure sealing layer X‐ray diffraction (XRD) Fourier transform infrared (FT‐IR) spectrum, respectively. corrosion characteristics in neutral 3.5 wt% NaCl solution...

Additives usually affect the electrochemical corrosion behaviours of metals which are immersed in electrolyte. In this study, five additives including thiourea (TU), thiosinamine (ATU), thiosemicarbazide (TSC), sodium benzoate (Bz) and citrate (SC) were added into electrolyte respectively to investigate AZ91D magnesium alloy neutral 0·05 wt-%NaCl solution. Open circuit potential (OCP), potentiodynamic polarisation impedance spectroscopy (EIS) measurements employed tests. The results revealed...

Abstract Sol–gel coatings cannot provide adequate corrosion protection for metal/alloys in the corrosive environments due to their high crack‐forming potential. This paper demonstrates possibility employ cerium nitrate as inhibitor decrease development of sol–gel‐based silane coating on magnesium alloy NaCl solution. Cerium was added into solution where coated immersed. Scanning electron microcopy (SEM) used examine surface morphology immersed solutions doped and undoped with nitrate. The...

Reactive adsorption desulfurization experiments were carried out on fluid catalytic cracking gasoline over a Ni/ZnO adsorbent in fixed bed reactor. Results demonstrated that is accompanied by hydrogen transfer, while isomerization and aromatization reactions are rare. coupling olefin conversion was attempted mixing catalyst consisting Zn-ZSM-5 with an at certain proportion. The process reduced the loss of octane number sustained ultradeep ability simultaneously. An Fe-modified developed,...