Abstract The conversion of bio‐waste into useful porous carbons constitutes a very attractive approach to contribute the development sustainable energy economy, even more as they can be used in storage devices. Here we report synthesis N‐doped from hydrothermal carbonization macroalgae, Enteromorpha prolifera (EP) , followed by mild KOH activation step. obtained exhibited surface areas up ∼2000 m 2 /g with N‐loadings varied range 1.4∼2.9 at %. By modifying temperature, were able tune...

Nanomaterials used as additives to diesel, biodiesel, and its blends have shown promising results in improving thermal efficiency reducing pollutant emissions compression ignition engines. However, the stability of dispersions has been noted literature a primary challenge effective use nanomaterials fuel additives. Between fuels are carbon nanotubes (CNTs). These carbonaceous materials positive negative concerning engine performance emissions, differences could be associated with dispersion...

In wastewater treatment plants (WWTP), struvite precipitation occurs spontaneously under conditions which are influenced by factors such as: concentration of Mg2+, and , pH, temperature, competitive ions. These parameters often difficult to control and, spontaneous creates operational problems in WWTP. Struvite is also a potentially marketable product as fertilizer alternative. For these two reasons it important study the principles precipitation, evaluate that this process. study, influence...

Results on the effects of a metal catalyst and role CO as reducing agent are reported for resin char Wyodak coal char, well demineralized samples latter. The effect an active catalyst, such potassium in current work, is to significantly increase reactivity both by increasing number reaction sites via dispersion activation energy CO2 production. latter beneficial result because it means that less carbon consumed per molecule NO reduced. Additional gas phase "catalyzes" reduction creation more...

Ceria supported copper oxide catalysts were produced by a deposition-precipitation method, at high loading (up to >25 wt%). These materials demonstrated excellent properties for glycerol selective conversion lactic acid, with reaching up 87% selectivity acid of 74% (8 h reaction, 220 °C, under N2 pressure). also exhibited stability upon 5 successive reaction cycles. The formation crystalline CuO phase was in the nanocomposites Cu loading, elongated shaped particles formed on cerium surface....

Catalytic adsorption of SO2 on activated carbon materials provides an appropriate alternative for the control low concentration emissions this air pollutant. The surface complexes formed upon at 30 °C were studied by X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption (TPD). effect addition O2 presence copper as catalyst studied. Copper assisted oxygen transfer to matrix. For Cu-impregnated sample, favored increasing breakthrough time, capacity formation sulfur...

The catalytic adsorption of NO on activated carbon materials provides an appropriated alternative for the control low-concentration emissions this air pollutant. surface complexes formed upon at 30 °C were studied by X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption (TPD). effects addition O2 presence copper as a catalyst studied. Copper assisted oxygen transfer to matrix. For Cu-impregnated sample, favored increasing breakthrough time, capacity, formation nitrogen...

Computational methods can potentially accelerate development of more efficient organic materials for second harmonic generation. Here, we test the method that includes evolutionary algorithm predicting crystal structure and prognosis nonlinear optical properties based on predicted structure. For this test, selected 2-iodo-3-hydroxypyridine, which exhibits generation intensity comparable to urea. We performed global minimization lattice energy found experimental when many-body dispersion...

Li-S batteries are ideal candidates to replace current lithium-ion as next-generation energy storage systems thanks their high specific capacity and theoretical density. Composite electrodes based on carbon microstructures often used a host for sulfur. However, sulfur lixiviation, insoluble species formation, how maximize the sulfur-carbon contact in looking improved electrochemical performance still major challenges. In this study, nitrogen doped mesoporous is The S/C composite prepared by...

Simultaneous adsorption of NO and SO2 on activated carbon provides an adequate alternative to control the low concentration emissions these air pollutants. The surface complexes formed during adsorptions at 30 °C were studied by X-ray photoelectron spectroscopy (XPS) temperature-programmed desorption (TPD). effects addition copper supported O2 gas stream studied. presence enhanced chemical both SO2. In simultaneous SO2, inhibited NO, while was notably improved. reaction carried out under a...

A systematic study of microwave-assisted transesterification castor oil was conducted in the presence ethanol and potassium hydroxide as catalyst. Effects various reaction parameters such time, catalyst concentration, temperature ethanol-oil molar ratio were analyzed. Ethyl esters successfully produced by transesterification. The maximum yield 80.1% at 60°C, 10:1 alcohol: ratio, 1.5% 10 min. results show that there a reduction time for compared to conventional heating, yields slightly...