Facile preparation of Pd-SiO2 catalyst through flame spray pyrolysis method for enhanced oxidation of aromatic hydrocarbons

2020 ◽  
Vol 754 ◽  
pp. 137508 ◽  
Author(s):  
Yunlong Guan ◽  
Gaofeng Deng ◽  
Yao Cheng ◽  
Zhichao Wang ◽  
Zenghe Li ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Aromatic Hydrocarbons ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Pyrolysis Method ◽  
Facile Preparation ◽  
Enhanced Oxidation

scholarly journals CoAl2O4 blue nanopigments prepared by liquid-feed flame spray pyrolysis method

2015 ◽  
Vol 20 (3) ◽  
pp. 580-587 ◽  
Author(s):  
Natalia Betancur Granados ◽  
Eongyu Yi ◽  
Richard Laine ◽  
Oscar Jaime Restrepo Baena
Keyword(s):  
Spray Pyrolysis ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Liquid Feed ◽  
Pyrolysis Method

Structural and luminescence properties of undoped, Nd3+ and Er3+ doped TiO2 nanoparticles synthesized by flame spray pyrolysis method

2016 ◽  
Vol 42 (9) ◽  
pp. 10579-10586 ◽  
Author(s):  
Serdar Yildirim ◽  
Metin Yurddaskal ◽  
Tuncay Dikici ◽  
Idil Aritman ◽  
Kadriye Ertekin ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Tio2 Nanoparticles ◽  
Luminescence Properties ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Doped Tio2 ◽  
Pyrolysis Method

PENGARUH LAJU ALIR GAS PEMBAKAR (LPG) TERHADAP PEMBUATAN KATALIS HETEROGEN NANOKOMPOSIT ZnO/Fe 2 O 3

EKUILIBIUM ◽  
2014 ◽  
Vol 13 (2) ◽  
Author(s):  
Arif Jumari
Keyword(s):  
Spray Pyrolysis ◽  
Alternative Energy ◽  
Particle Diameter ◽  
Precursor Solution ◽  
Flame Spray Pyrolysis ◽  
Esterification Reaction ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Bag Filter ◽  
Bet Analysis

<p>Abstract: Biodiesel as alternative energy can be produced by trans-esterification reaction of<br />vegetable oils or animal oils with homogeneous or heterogeneous catalysts. Heterogeneous<br />catalysts have several advantages over homogeneous catalysts that it is easier to be separated.<br />ZnO is one of the compounds that it has very high catalytic properties with a yield of 86.1%.<br />Making the catalyst is easier to be separated, Fe<br />2<br />O<br />3<br />is added to the matrix of ZnO. This<br />research was conducted to determine the effect of flow rate of burner gas (LPG) to the size of<br />catalyst particles with a fixed precursor composition (1:1) using a flame spray pyrolysis method.<br />The first procedure performed was nebulizing the precursor solution of Zn(NO<br />3<br />,<br />then the droplet was flowed through the tube to the burner. At the same time, turning on the<br />carrier gas and the burner gas (LPG) through inner pipe and annulus. Solids from the<br />combustion in the burner were sipped with exhauster and solid nanoparticles were filtered using<br />a bag filter. Then the solid product were separated from bag filter for further analysis. The<br />results were analyzed by XRD, SEM, and BET. From the results of XRD analysis, it was known<br />that the nanocomposite particles obtained were ZnO/Fe<br />2<br />O<br />3<br />. The results of SEM analysis<br />showed that the particles only have some nano-sized particles. They consisted of particles of<br />about 1 nm to 100 nm with percentage 35%; some submicron-sized particles (101 nm to 500<br />nm with percentage 45%; and some micron-sized particles (more than 500 nm) with percentage<br />20%. While the results of BET analysis described the specific area of particles, so that the<br />particle diameter could be calculated. It showed that the particles were nano-sized, namely<br />26.652 – 133.771 nm.<br />Keywords: nanocomposite, burner gas, flame spray pyrolysis<br />)2<br />and Fe(NO<br />3<br />)3</p>

Synthesis of Yttria-Stabilized Zirconia Particles by Flame Spray Pyrolysis Method

2012 ◽  
Vol 629 ◽  
pp. 70-74
Author(s):  
Xiong Zhou ◽  
Wen Jun Kong
Keyword(s):  
Spray Pyrolysis ◽  
Synthesis Method ◽  
Precursor Solution ◽  
Yttria Stabilized Zirconia ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Stabilized Zirconia ◽  
Barrier Coating ◽  
Size And Morphology

This paper presented a novel synthesis method for yttria-stabilized zirconia (YSZ) by using the flame spray pyrolysis (FSP) method. Spherical and dense YSZ particles for thermal barrier coating were successfully synthesized by FSP from the nebulized precursor solution. XRD results revealed that the YSZ powder is only composed of tetragonal phase particles. Most particles are a few hundred nanometers in diameter and their sizes are mainly dependent on the concentration of the precursor solution, while flame condition has little effect. Particle size and morphology are greatly affected by the precursor composition. Particles synthesized from ethanol precursor solution are more uniform and better-defined than those from aqueous solution.

Flame-Made CuO/ZnO/Al2O3 Catalyst for Methanol Steam Reforming

2013 ◽  
Author(s):  
Emmanuel Lim ◽  
Teeravit Visutipol ◽  
Wen Peng ◽  
Nico Hotz
Keyword(s):  
Carbon Monoxide ◽  
Spray Pyrolysis ◽  
Steam Reforming ◽  
Methanol Conversion ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Methanol Steam Reforming ◽  
Flame Spray ◽  
Inlet Flow ◽  
Flow Rates

In the present study, a catalyst produced by flame spray pyrolysis (FSP) was evaluated for its ability to produce hydrogen-rich gas mixtures. Catalyst particles fabricated by a novel flame spray pyrolysis method resulting in a highly active catalyst with high surface-to-volume ratio were compared to a commercially produced catalyst (BASF F3-01). Both catalysts consisted of CuO/ZnO/Al2O3 of identical composition (CuO 40wt%, ZnO 40wt%, Al2O3 20wt%). Reaction temperatures between 220 and 295 °C, methanol-water inlet flow rates between 2 and 50 μl/min, and reactor masses between 25 and 100 mg were tested for their effect on methanol conversion and the production of undesired carbon monoxide. 100% methanol conversion can be easily achieved within the operational conditions mentioned for this flame-made catalyst — at reactor temperatures of 255 °C (achievable with non-concentrating solar collectors) more than 80% methanol conversion can be reached for methanol-water inlet flow rates as high as 10 μl/min. The FSP catalyst demonstrates similar catalytic abilities as the BASF, produces a consistent gas composition and produces lower overall CO production. Furthermore, the FSP catalyst demonstrates a better suitability to fuel cell use through its higher resistance to degradation and smaller production of carbon monoxide over long-term use. In the present study, the merits of using flame spray pyrolysis to produce CuO/ZnO/Al2O3 methanol steam reforming catalysts are examined, and directly compared to catalysts that are commercially produced in bulk pellet form, and then ground and sieved. The comparison is performed from several different perspectives: catalytic activity and CO production at various temperatures and fuel inlet flow rates; surface and structure characteristics are determined via scanning electron and transmission electron microscopy; surface area characteristics are determined via BET tests.

scholarly journals Flame-Assisted Spray Pyrolysis Using an Annular Flame Nozzle with Decoupled Velocity Control

2018 ◽  
Vol 2 (4) ◽  
pp. 75
Author(s):  
Maxym Rukosuyev ◽  
Syed Baqar ◽  
Jungsoo Nam ◽  
Huitaek Yun ◽  
Martin Jun
Keyword(s):  
Spray Pyrolysis ◽  
Process Parameters ◽  
Flame Temperature ◽  
Precursor Solution ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Flexible Control ◽  
Flexible System ◽  
Average Size

Flame spray pyrolysis, widely used in chemical industries, is a technology to synthesize nanoparticles. While the flame spray pyrolysis uses fuels as a solution liquid, the flame-assisted spray pyrolysis method uses aqueous solutions. Since process parameters such as concentration of precursor, size of droplets, and ratio of the air–gas mixture affect the size of nanoparticles, developing a flexible system to control these parameters is required. This paper proposes a new type of nozzle system to produce nanoparticles using flame-assisted spray pyrolysis. The annular nozzle design allows flexible control of particle flow and temperature, and an ultrasonic nebulizer was used to produce droplets with different size. Experiments were conducted to analyze the relationship between nanoparticle size and process parameters, concentration of precursor, frequency of the atomizer, and flame temperature. A precursor solution consisting of silver nitrate (AgNO3) mixed in deionized water is used. The effects of the process parameters are discussed, and analysis of the nanoparticles shows that silver nanoparticles are deposited with an average size of 25~115 nm.

Flame-Made Catalyst for Bio-Methanol Steam Reforming

2013 ◽  
Author(s):  
Nico Hotz
Keyword(s):  
Carbon Monoxide ◽  
Spray Pyrolysis ◽  
Steam Reforming ◽  
Methanol Conversion ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Methanol Steam Reforming ◽  
Flame Spray ◽  
Inlet Flow ◽  
Flow Rates

In the present study, a catalyst produced by flame spray pyrolysis (FSP) was evaluated for its ability to produce hydrogen-rich gas mixtures. Catalyst particles fabricated by a novel flame spray pyrolysis method resulting in a highly active catalyst with high surface-to-volume ratio were compared to a commercially produced catalyst (BASF F3-01). Both catalysts consisted of CuO/ZnO/Al2O3 of identical composition (CuO 40wt%, ZnO 40wt%, Al2O3 20wt%). Reaction temperatures between 220 and 295 °C, methanol-water inlet flow rates between 2 and 50 μl/min, and reactor masses between 25 and 100 mg were tested for their effect on methanol conversion and the production of undesired carbon monoxide. 100% methanol conversion can be easily achieved within the operational conditions mentioned for this flame-made catalyst — at reactor temperatures of 255 °C (achievable with non-concentrating solar collectors) more than 80% methanol conversion can be reached for methanol-water inlet flow rates as high as 10 μl/min. The FSP catalyst demonstrates similar catalytic abilities as the BASF, produces a consistent gas composition and produces lower overall CO production. Furthermore, the FSP catalyst demonstrates a better suitability to fuel cell use through its higher resistance to degradation and smaller production of carbon monoxide over long-term use. In the present study, the merits of using flame spray pyrolysis to produce CuO/ZnO/Al2O3 methanol steam reforming catalysts are examined, and directly compared to catalysts that are commercially produced in bulk pellet form, and then ground and sieved. The comparison is performed from several different perspectives: catalytic activity and CO production at various temperatures and fuel inlet flow rates; surface and structure characteristics are determined via scanning electron and transmission electron microscopy; surface area characteristics are determined via Brunauer-Emmett-Teller (BET) tests.

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