KARAKTERISTIK FISIK NANOKOMPOSIT ZNO/Fe2O3 YANG DIBUAT MENGGUNAKAN  FLAME SPRAY PYROLISIS  DENGAN VARIASI LAJU ALIR GAS PEMBAWA

Abstract: Biodiesel is a very potential alternative energy resources. Producing of Biodiesel was much carried out using homogeneous catalytic esterification of vegetable oil and alcohol. These proces had many disanvantages. ZnO as a transesterification catalyst has given high yield. To improve the catalytic performance, the surface area per mas of catalyst must be increased by decreasing the size of particle. To ease the separation between product and catalyst, the magnetic behaviour should be added to the catalyst. The aim of the research were to obtain nanocomposite ZnO/Fe2O3 and determine physical characteristic as well as catalytic and separation performance. Nanocomposite ZnO/Fe2O3 was synthesized by flame spray pyrolysis method. Assisted by carrier air precursor solution of Zn(NO3)2 and Fe(NO3)3 was nebulized and flowed to the inner tube of the burner. Nebulasation was carried out by varying carrier gas flow rate but at constant rateof nebulization. LPG gas dan oxidant air were flowed to the inner annulus and outer annulus, respectively. The solid produced was separated from gas by particle filter. The solid particle was then examined by XRD , FE-SEM and BET as wel as catalytic performance. The result showed that the crystalinity of samples decreased by increasing the carrier gas flow rate. The particle size was not influenced by carrier gas flow rate and the size were dominantly between 50-100 nm. A part of particle was flowerlike particle. The specific surface area of particle was not inflenced by carrier gas flow rate and its value was 50.5 m2/gram. Keywords : Tran-esterification, nanocomposite ZnO/Fe2O3, flame spray pyrolysis, carrier gas, particle size, particle morphology, specific surface area

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Effect of operating parameters on production of bio-oil from fast pyrolysis of maize stalk in bubbling fluidized bed reactor

Polish Journal of Chemical Technology ◽

10.1515/pjct-2016-0053 ◽

2016 ◽

Vol 18 (3) ◽

pp. 88-96 ◽

Cited By ~ 15

Author(s):

Najaf Ali ◽

Mahmood Saleem ◽

Khurram Shahzad ◽

Sadiq Hussain ◽

Arshad Chughtai

Keyword(s):

Particle Size ◽

Flow Rate ◽

Gas Flow ◽

Fast Pyrolysis ◽

Superficial Velocity ◽

Operating Parameters ◽

Gas Flow Rate ◽

Carrier Gas ◽

Bio Oil ◽

Carrier Gas Flow

Abstract The yield and composition of pyrolysis products depend on the characteristics of feed stock and process operating parameters. Effect of particle size, reaction temperature and carrier gas flow rate on the yield of bio-oil from fast pyrolysis of Pakistani maize stalk was investigated. Pyrolysis experiments were performed at temperature range of 360-540°C, feed particle size of 1-2 mm and carrier gas fl ow rate of 7.0-13.0 m3/h (0.61.1 m/s superficial velocity). Bio-oil yield increased with the increase of temperature followed by a decreasing trend. The maximum yield of bio-oil obtained was 42 wt% at a temperature of 490°C with the particle size of around 1.0 mm and carrier gas flow rate of 11.0 m3/h (0.9 m/s superficial velocity). High temperatures resulted in the higher ratios of char and non-condensable gas.

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PENGARUH LAJU ALIR GAS PEMBAWA TERHADAP PEMBUATAN KATALIS HETEROGEN NANOKOMPOSIT ZnO/Fe2O3

EKUILIBIUM ◽

10.20961/ekuilibrium.v1i1.2018 ◽

2016 ◽

Vol 1 (1) ◽

Author(s):

Arif Jumari

Keyword(s):

Flow Rate ◽

Gas Flow ◽

Precursor Solution ◽

Solid Particles ◽

Reaction Yield ◽

Flame Spray ◽

Gas Flow Rate ◽

Carrier Gas ◽

Bet Analysis ◽

Carrier Gas Flow

Abstract: Biodiesel is an alternative fuel. Biodiesel was produced through the transesterification of vegetable oils or animal with the aid of a catalyst. One of them is the ZnO heterogeneous catalyst which have high reaction yield. To increase the yield of the reaction, the size of the catalyst needs to be minimized, but the separation be more difficult. Fe2O3 compounds was added to separation due to its magnetic properties. This study was conducted to obtain nano-composite ZnO/ Fe2O3 heterogeneous catalysts and determine the effect of carrier gas flow rate on the characteristics of the catalyst particle by pyrolisis flame spray method. Precursor solution of Zn(NO3)2 and Fe (NO3)3 was nebulized on Nebulizer OMRON NEU-17 and flows to the burner tube with the different carrier gas flow rate. At the same time, LPG gas burners and combustion air was passed through the inner and outer annular burner. The solid combustion products was inhaled by exchauster and filtered by using a particle filter. The solid particles obtained was analyzed by XRD, SEM, and BET. The results of XRD analysis showed that the smaller the carrier gas flow rate the greater intensity of radiation so that it gained the better crystallinity. The results of SEM and BET analysis showed that the mostly of the particles were nano-sized. So the smaller the carrier gas flow rate, the smaller diameter is formed and the larger the specific surface area.

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PENGARUH LAJU ALIR GAS PEMBAWA TERHADAP PEMBUATAN KATALIS HETEROGEN NANOKOMPOSIT ZnO/Fe 2 O 3

EKUILIBIUM ◽

10.20961/ekuilibrium.v14i1.2058 ◽

2015 ◽

Vol 14 (1) ◽

Author(s):

Arif Jumari

Keyword(s):

Flow Rate ◽

Gas Flow ◽

Precursor Solution ◽

Solid Particles ◽

Reaction Yield ◽

Flame Spray ◽

Gas Flow Rate ◽

Carrier Gas ◽

Bet Analysis ◽

Carrier Gas Flow

Abstract: Biodiesel is an alternative fuel. Biodiesel was produced through the transesterification of vegetable oils or animal with the aid of a catalyst. One of them is the ZnO heterogeneous catalyst which have high reaction yield. To increase the yield of the reaction, the size of the catalyst needs to be minimized, but the separation be more difficult. Fe 2 O 3 compounds was added to separation due to its magnetic properties. This study was conducted to obtain nanocomposite ZnO/ Fe 2 O 3 heterogeneous catalysts and determine the effect of carrier gas flow rate on the characteristics of the catalyst particle by pyrolisis flame spray method. Precursor solution of Zn(NO 3 )2 and Fe (NO 3 )3 was nebulized on Nebulizer OMRON NEU-17 and flows to the burner tube with the different carrier gas flow rate. At the same time, LPG gas burners and combustion air was passed through the inner and outer annular burner. The solid combustion products was inhaled by exchauster and filtered by using a particle filter. The solid particles obtained was analyzed by XRD, SEM, and BET. The results of XRD analysis showed that the smaller the carrier gas flow rate the greater intensity of radiation so that it gained the better crystallinity. The results of SEM and BET analysis showed that the mostly of the particles were nano-sized. So the smaller the carrier gas flow rate, the smaller diameter is formed and the larger the specific surface area. Keywords: nanocomposite, carrier gas, flame spray pyrolysis

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PENGARUH LAJU ALIR LPG (SEBAGAI BAHAN BAKAR BURNER) TERHADAP KARAKTERISTIK NANOKOMPOSIT ZnO/Fe2O3 YANG DIBUAT MENGGUNAKAN FLAME SPRAY PYROLISIS

EKUILIBIUM ◽

10.20961/ekuilibrium.v10i1.2224 ◽

2011 ◽

Vol 10 (1) ◽

Author(s):

Agus Purwanto ◽

Arif Jumari ◽

Sperisa Distantina

Keyword(s):

Particle Size ◽

Specific Surface ◽

Spray Pyrolysis ◽

Surface Area ◽

Specific Surface Area ◽

Flow Rate ◽

Catalytic Performance ◽

Side Product ◽

Flame Spray Pyrolysis ◽

Flame Spray

Abstract: Biodiesel is produced through catalytic esterification process of vegetable oil and alcohol. Producing of biodiesel was much carried out using homogeneous catalyst (acid/base). These process had many disanvantages: high energy consumption, side product formed and complicated separation among side product and catalyst. ZnO as transesterification catalyst has given high yield. To improve the catalytic performance, surface area per mas of catalyst must be increased by decreasing size of particle. To ease separation between product and catalyst, magnetic behaviour should be added to the catalyst. Aims of research were to obtain nanocomposite ZnO/Fe2O3 and determine physical characteristic as well as catalytic and separation performance of nanocomposite ZnO/Fe2O3. Nanocomposite ZnO/Fe2O3 was synthesized by flame spray pyrolysis method. Assisted by carrier air precursor solution of Zn(NO3)2 and Fe(NO3)3 was nebulized and flowed to inner tube of burner. Nebulasation was carried out by varying carrier gas flow rate but at constant rate of nebulization. LPG gas dan oxidant air were flowed to the inner annulus and outer annulus, respectively. The solid produced was separated from gas by particle filter. Solid particle obtained was then examined by X Ray Defraction (XRD), FE-SEM and BET as wel as catalytic performance. The result of the research showed that crystalinity of particles increased by increasing LPG flow rate. Particle size of ZnO/Fe2O3 nanocomposite decreased by increasing LPG flow rate and size were dominantly between 50-100 nm. A part of particle was flowerlike particle. Specific surface area of ZnO/Fe2O3 nanocomposite increased by increasing LPG flow rate and its value were between 45-55 m2/gram. Keywords: Tran-esterification, nanocomposite ZnO/Fe2O3, flame spray pyrolysis, carrier gas, particle size, morphology of particle, specific surface area

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