Recent progress in the application in compression ignition engines and the synthesis technologies of polyoxymethylene dimethyl ethers

Developing NH₃ separation technology with high efficiency is very meaningful for the advancement of the NH₃ synthesis process. In this work, a new class of deep eutectic solvents (DESs) were designed by pairing N,N,N′,N′-tetramethyl-1,3-propanediamine dihydrochloride ([TMPDA]Cl₂) with phenol (PhOH) at the molar ratios of 1:3∼7. [TMPDA]Cl₂ + PhOH DESs have multiple weak-acidic groups and viscosities of as low as 48.1 cP at 298.2 K. They also exhibit excellent performance for the separation of NH₃, showing not only efficient and selective but also reversible absorption of NH₃. Especially, the solubilities of NH₃ in [TMPDA]Cl₂ + PhOH DESs at low pressures can reach 4.49 mol/kg of NH₃ at 298.2 K and 13.3 kPa, being superior to those of most of the DESs and ILs reported in the literature. The mechanism of NH₃ absorption was further elucidated by quantum chemistry calculations and ¹H NMR spectra. It is validated that the efficient absorption of NH₃ in DESs origins from the strong interaction of multiple weak-acidic groups of DESs with NH₃.

Designing Low-Viscosity Deep Eutectic Solvents with Multiple Weak-Acidic Groups for Ammonia Separation

Rapid depletion in fossil fuels, inflation in petroleum prices, and rising energy demand have forced towards alternative transport fuels Among these alternative fuels, diesel-ethanol and diesel-biodiesel blends gain the most attention due to their quality characteristics and environmentally friendly nature The viscosity and density of these biodiesel blends are slightly higher than diesel, which is a significant barrier to the commercialization of biodiesel In this study, the density and viscosity of 30 different ternary biodiesel blends was investigated at 15 °С and 40 °С, respectively Different density and viscosity models were developed and tested on biodiesel blends soured from different feedstock’s including palm, coconut, soybean, mustard, and calophyllum oils The prognostic ability and precisions of these developed models was assessed statistically using Absolute Percentage Error (APE) and Mean Absolute Percentage Error (MAPE) The MAPE of 0045% and 0085% for density model and 185%, 141%, 348% and 227%, 185%, 350% for viscosity models were obtained on % volume and % mass basis These developed correlations are useful for ternary biodiesel blends where alcohols are the part of biodiesel blends The modeled values of densities and viscosities of ternary blends were significantly comparable with the measured densities and viscosities, which are feasible to avoid the harm of vehicles’ operability

Modeling Viscosity and Density of Ethanol-Diesel-Biodiesel Ternary Blends for Sustainable Environment

Extraction, characterization and antioxidant activity of fenugreek (Trigonella-Foenum Graecum) seed oil

State-of-the-art ionic liquid & ionanofluids incorporated with advanced nanomaterials for solar energy applications

Experimental data on viscosity of typical ionic liquids in the liquid state were compiled and critically evaluated. The compilation contains data for 268 ionic liquids from 215 literature references and covers the period from 1998 through the end of December 2018. Equations for corrections of influences of contamination water and residual Cl− on viscosities of a series of typical ionic liquids are established. The influences of experimental methodology and the impurities (i.e., contamination water and residual halide ions) of the samples used on the reported viscosities of these typical ionic liquids are critically evaluated or quantitatively corrected, and the viscosities for these “pure” ionic liquids are recommended. The parameters of the Vogel–Fulcher–Tammann equation for temperature dependence of the recommended viscosities of these ionic liquids were reported. The effects of ionic structures on the viscosity of ionic liquids are presented.

Viscosity of Typical Room-Temperature Ionic Liquids: A Critical Review

Evaluation of polyoxymethylene dimethyl ethers as a new type of diesel additives

Lewis acids promote the catalytic selectivity to polyoxymethylene dimethyl ethers PODE3,4

The reactions that determine the yield and selectivity of 1,3,5-trioxane

Hydrogen energy, as a clean and renewable energy, has attracted much attention in recent years. Water electrolysis via the hydrogen evolution reaction at the cathode coupled with the oxygen evolution reaction at the anode is a promising method to produce hydrogen. Given the shortage of freshwater resources on the planet, the direct use of seawater as an electrolyte for hydrogen production has become a hot research topic. Direct use of seawater as the electrolyte for water electrolysis can reduce the cost of hydrogen production due to the great abundance and wide availability. In recent years, various high-efficiency electrocatalysts have made great progress in seawater splitting and have shown great potential. This review introduces the mechanisms and challenges of seawater splitting and summarizes the recent progress of various electrocatalysts used for hydrogen and oxygen evolution reaction in seawater electrolysis in recent years. Finally, the challenges and future opportunities of seawater electrolysis for hydrogen and oxygen production are presented.

/pdf/recent-advances-in-seawater-electrolysis-18oouvr2.pdf

Siqi Jiang

Papers

Viscosity of Typical Room-Temperature Ionic Liquids: A Critical Review

Evaluation of polyoxymethylene dimethyl ethers as a new type of diesel additives

Lewis acids promote the catalytic selectivity to polyoxymethylene dimethyl ethers PODE3,4

The reactions that determine the yield and selectivity of 1,3,5-trioxane

Recent Advances in Seawater Electrolysis