Using a combination of quantum chemistry and cluster size distribution dynamics, we study the heterogeneous nucleation n-butanol water onto sodium chloride (NaCl)10 seeds at different butanol saturation ratios relative humidities. We also investigate how is affected by seed through comparing (NaCl)5, (NaCl)10, (NaCl)25 electrical charge (Na10Cl9)+, (Na9Cl10)− seeds. Butanol common working fluid...

Traditionally, bio-butanol is produced with the ABE (Acetone Butanol Ethanol) process using Clostridium species to ferment sugars from biomass. However, the route is associated with some disadvantages such as low butanol yield and by-product formation (acetone and ethanol). On the other hand, butanol can be directly produced from ethanol through aldol condensation over metal oxides/ hydroxyapat...

BACKGROUND Multiplex control of metabolic pathway genes is essential for maximizing product titers and conversion yields of fuels, chemicals, and pharmaceuticals in metabolic engineering. To achieve this goal, artificial transcriptional regulators, such as clustered regularly interspaced short palindromic repeats (CRISPR) interference (CRISPRi), have been developed to specifically repress genes...

BACKGROUND Though butanol is considered as a potential biofuel, its toxicity toward microorganisms is the main bottleneck for the biological butanol production. Recently, butanol-tolerant bacteria have been proposed as alternative butanol production hosts overcoming the end product inhibition. One remaining key issue to be addressed is how physicochemical properties such as pH and temperature a...

Density (ρ), refractive index (n), ultrasonic velocity (u), and viscosity (η) were measured for the binary mixtures formed by butylamine with 1-butanol and tert-butanol at temperatures 293, 303, and 313 K over the entire composition range. Excess molar volume V E m , molar refraction deviation ∆Rm, deviation in ultrasonic velocity ∆u, viscosity deviation ∆η, and excess Gibb’s free energy of act...

Higher carbon alcohols such as n-propanol, n-butanol, and n-pentanol that can be produced from biomass used alternative fuels in diesel engines. These mix with both fuel biodiesel without any phase separation. Currently, unregulated emissions toxicity total polycyclic aromatic hydrocarbon (PAH) the use of these are not monitored. Investigating effects increasing concentration for a engine on PA...

This article presents the results of training, selection and control a group assessors to determine odour threshold. General recommendations European standard EN 13725: 2003 “Air quality － Determination concentration by dynamic olfactometry” for supervision were used in this work. A trained assessor team or panel is measuring instrument. The olfactometry method was gas sample. N-butanol chosen ...

Materials were synthesized for the recovery of n-butanol from dilute aqueous solutions, as may be useful for applications in biofuel-water separations. These materials are composed of hydrophobic, cavity-containing calixarenes covalently bound directly to porous, hydrophilic silica supports through a Si linker atom rather than a flexible organic linker, as is common, at surface coverages of up ...

A model for the combustion of butanol is studied using a recently developed theoretical method for the systematic improvement of the kinetic mechanism. The butanol mechanism includes 1446 reactions, and we demonstrate that it is straightforward and computationally feasible to implement a full global sensitivity analysis incorporating all the reactions. In addition, we extend our previous analys...