The promotion effect of nitromethane (NM) on ethane ignition is studied in a heated shock tube. An unusual promotion effect of NM is observed: the ignition delay time of blends first decreases and then increases with increasing NM blending ratio, and the promotion effect peaks at blending ratio of 0.5. A model from our recent study [Fuel, 2019, 256: 115956] can reproduce the measurements and the abnormal

Simulations of a supersonic, premixed, reacting flow over a wedge were performed to investigate the effect of a boundary layer on the wedge surface on ignition and stability of oblique detonation waves (ODWs). Two computational domains were used: one containing a wedge of a single angle with a straight after-body, and the other containing a double-angle wedge geometry. Both domains were channels with

Self-excited thermoacoustic instabilities in symmetric annular combustion chambers typically give rise to spinning, standing and mixed azimuthal modes which are time-varying in nature and occur in a highly noisy environment due to turbulent combustion. We investigate the effect of linear ramps of increasing and decreasing equivalence ratio on the operating limits and thermoacoustic dynamics, from near

Enthalpies of solution at infinite dilution have been determined for 2-propanol, ethylene glycol, 1,3-butanediol, 1,4-butanediol, phenol, 1-naphthol, 3-nitrophenol, 4-nitrophenol, 4-chlorophenol, and formamide, dissolved in N-methylformamide, 2-pyrrolidone, and N-methylpyrrolidone at 298.15 K, as well as for N-methylformamide dissolved in 2-pyrrolidone and N-methylpyrrolidone, based on solution calorimetric

Lignin is a renewable biopolymer from industrial crops that can be used for several value-added products. Moreover, lignin is an underexploited side stream of pulp and paper industries and biorefineries that is used for the production of energy at mill or as a low-value resource for dispersants or binding applications. In order to produce gasoline and high-value chemical products, an integrated process

The results of Fourier Transform Infrared absorption and Raman spectroscopy studies are reported for solid and liquid neat butane-1,4-diamine (DAB) and for the molecule in different solvents. Ab initio molecular dynamics and static calculations are reported in the work as an interpretative tool for the measurements and provide an analysis of the relative population of DAB conformers, both in vacuo

Microfluidic chips have been widely used in microfluidic calorimeters. The thermoelectric power can be obtained by measuring the laminar flow peak value of the reaction liquid. Due to heat dissipation and heat inhomogeneity, thermodynamic parameters can not accurately describe the thermal state and thermal properties. With the inlet velocity and velocity ratio in Y-channel as the two key parameters

This article explored the adsorption of the cationic malachite green (MG) dye and phenol, on hematite iron oxide nanoparticles (α-Fe2O3).The characterization of Fe2O3 was evaluated by specific surface measurements of Brunauer Emmett-Teller (BET) and by Fourier transform infrared spectroscopy (IFTR).The results collected on the kinetics adsorption of malachite green show that the adsorption followed

This paper examines the mechanical, abrasive and erosive wear properties of a thermal spray enhanced with randomly dispersed solid lubricants. Two different solid lubricants including graphite and polytetrafluoroethylene (PTFE) were mixed with a NiAl2O3 thermal spray to develop a stable thermal coating. The solid lubricants increased the wear resistance of the coating upon the erosion of the spray

In this study, CuO thin films are grown by spin coating method as a function of La doping on n-Si substrates. The morphological properties of thin films have been analyzed by AFM images, and it has been observed that the roughness of thin films have been decreased with increasing La dopant concentration. The surface topography and chemical composition of thin films have been studied by scanning electron

Highly concentrated dispersions of fluorescent organic nanoparticles (FONs), broadly used for optical tracking, bioimaging and drug delivery monitoring, are obtained using a newly designed micromixer chamber involving high impacting flows. Fine size tuning and narrow size distributions are easily obtained by varying independently the flow rates of the injected fluids and the concentration of the dye

The value of dp2 was incorrectly given in the main text. The correct value, for both the r2SCAN exchange and correlation energy functionals, is dp2 = 0.361 as given in the Supporting Information. We regret the error and thank F. Tran for bringing this to our attention. The authors were made aware at the time of publication of calculations using the TASK exchange functional that demonstrate increased

While existing ion mobility calculators are capable of feats as impressive as calculating collision cross sections (CCS) within a few per cent and within a very reasonable time, the simplifications assumed in their estimations precludes them from being more precise, potentially overreaching with respect to the interpretation of existing calculations. With ion mobility instrumentation progressively