Request PDF | Conversion of Eragrostis plana Nees leaves to activated carbon by microwave assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions | In this paper ...
Dense, homogeneous CuBi2O4 thin films are prepared, for the first time, by spray pyrolysis. Major challenges related to the chemical stability of the precursor solution and spreading behavior of the sprayed droplets are revealed and addressed. Triethyl orthoformate (TEOF) is added as a water scavenger to avo
Fig. 2 shows the SEM photographs of the post-treated LiFePO 4 powders obtained from the colloidal and aqueous spray solutions. The precursor powders obtained by spray pyrolysis were post-treated at a temperature of 750 °C for 4 h.The post-treatment of the precursor powders was performed under a reducing atmosphere to prevent the oxidation of …
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The application of biosorption in the removal of heavy metals from water faces a challenge of safe disposal of contaminated biomass. In this study, a potential solution for this problem was proposed by using a biosorption-pyrolysis process featured by pretreatment of biomass with phosphoric acid (PA). The PA pretreatment of biomass increased the removal …
The prolongation of pyrolysis time promoted the pyrolysis process of aluminum chloride solution and contributed to the formation of Al2O3 phase. Relationship curve of standard Gibbs free energy ...
These events produce the spectrum of droplet size distribution described by the equation: _[ ln{[^w-w+w}' '4] where 1 is integer, that takes the values equal to or greater than 2. SYNTHESIS OF MULLE POWDER BY ULTRASONIC SPRAY PYROLYSIS 345 100- run I (c) (d) Figure 3. TEM micrographs of muUite powder heated at 1000 (a) and 1200 (b,c,d).
The spray pyrolysis technique is an adaptable processing method for preparing single- and multi-layered films as dense or porous, ceramic coatings, and various material powders [2].The existing spray processing techniques can be classified either based on the type of the energy source for the starting solution reaction for the spray pyrolysis process …
When the pyrolysis temperature was reached to 800 ℃ and the pyrolysis time was prolonged to 150 min (As was shown in Fig. 4 (c)), a large number of diffraction peaks of Al 2 O 3 had began to appear, which indicated that prolonging the pyrolysis time promoted the pyrolysis of aluminum chloride solution and contributed to the formation of Al 2 ...
Spray pyrolysis is a method of synthesizing nanoparticles on a large scale by …
In this study, nano-sized indium oxide powder with average particle size below 50 nm is synthesized from indium chloride solution by a spray pyrolysis process. This study also examines influences of reaction factors on the properties of the synthesized powder.
SrTiO 3 was doped with three types of molybdenum ions (Mo 6+, Mo 4+, and Mo 2+) by spray pyrolysis.The molybdenum ions narrowed the band gap of SrTiO 3 to allow hydrogen evolution under visible-light irradiation. The molybdenum-doped SrTiO 3 photocatalyst prepared from MoO 2 (0.4 mol%) exhibited hydrogen evolution up to a rate of …
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2.2.4. Pyrolysis/Carbonization . Pyrolysis is a powerful technique to fabricate the fluorescent CDs by using macroscopic carbon structures as precursors in recent years. This method offers advantages of short reaction time, low cost, easy operation, solvent-free approaches and scalable production.
A variety of spray pyrolysis (SP) techniques have been developed to directly produce ceramic powders from solutions. This paper reviews the current status of these processes in terms of the process parameters that enable the formation of particles …
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Preparation of high-performance high temperature superconducting Bi-2212 wires by the spray pyrolysis powder Bo Yang1,2, Qingbin Hao2,*, Peng Xiao1, Guoqing Liu2, Gaofeng Jiao2, Kai Yao2, Xiaoyan Xu2, Lijun Cui2, Shengnan Zhang2, Chengshan Li2, and Jianqing Feng2 1School of Materials Science and Engineering, Xi'an University of Technology, Xian 710048, People's …
Combusting tyres yields heat but releases harmful gases. Incineration generates energy and radioactive waste. Pyrolysis decomposes tyres into oil, char, and gas without hazardous emissions, benefiting the environment. Recently, the pyrolysis process has attracted more attention to convert waste tyres into energy products (Martínez et al ...
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Pyrolysis process consists of two-stages in integration aims to carbon purification, evaporates volatile compounds so that it enlarges the pore diameter, and increases the surface area of the ...
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The Bi-2212 powder was prepared using a spray pyrolysis technique. In this study, according to the nominal cation stoichiometries Bi 2.10 Sr 1.87 Ca 0.86 Cu 1.93 O x, the stoichiometric amounts of Bi 2 O 3, SrCO 3, CaCO 3, and Cu were dissolved in concentrated nitric acid to obtain a mixed metal nitrate solution. Then, add an appropriate amount of …
This study shows a route to improve both the sustainability and economic …
The ultrasonic spray pyrolysis method is a cost-effective and adaptable …
The feedstock type and pyrolysis purging gas affected biochar properties, especially for the RS biochars, which had well-defined structures compared to the PMS biochars that had a rugged surface (Fig. 1).The RS-CO 2 biochars had cylindrical or tubular pores with almost uniform cross-sections, whereas those produced under the N 2 environment showed a …
In the recent decades, catalytic fast pyrolysis (CFP), the integration of catalytic upgrading with fast pyrolysis in a single reactor, has been explored as promising technique to generate high-quality bio-oil low in oxygen content (Starace et al., 2017).It is reported the bio-crude obtained from CFP is more compatible with the current refining industries.
This process has four major application areas: (i) production of carbon …
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The samples were ground to a powder using an agate mortar, and then, paraffin wax was uniformly mixed with the sample powder in a mass ratio of 1:8 (sample:paraffin). The mixture was pressed into a hollow cylindrical sample (inner diameter: 3.04 mm, outer diameter: 7.00 mm) through a special mold for measurement.
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The chemical content within the solid phase particles is assessed by grinding these same particles to a fine powder and reacquiring the spectra. The near surface region of the resulting powder then consists mostly of the internal regions of the original particles. ... Sorptive removal of salicylic acid and ibuprofen from aqueous solutions using ...
Ekona is using an established process – methane pyrolysis – in a ground-breaking new way to create a low-cost clean hydrogen production pathway to meet growing global demand for hydrogen, decarbonized natural …
Submicron nickel powders were obtained by ultrasonic spray pyrolysis of an aqueous solution of NiCl 2 and Ni(NO 3 ) 2 followed by thermal decomposition of the resulting aerosol in a H 2 /N 2 atmosphere. The solution was sprayed by means of an aerosol generator operating at 2.5MHz. The droplet size was 2.26μm. Nitrogen at a flow rate of 3.33dm 3 /min -1 was used as the …
It seems that burnout temperature and fuel reactivity are moving in opposite directions at the moment. Using an aqueous solution of AuCl 4 0.2H 2 O and a surfactant solution in hexane, the ECM was also used for the synthesis of gold coatings by heat treatment [86]. A very pure powder can be produced very fast in one step using the combustion ...
T1 - Ceramic Powder Synthesis by Spray Pyrolysis. AU - Messing, Gary L. AU - Zhang, Shi‐Chang ‐C. AU - Jayanthi, Gopal V. PY - 1993/11. Y1 - 1993/11. N2 - A variety of spray pyrolysis (SP) techniques have been developed to directly produce ceramic powders from …
