scholarly journals Development of a Sawdust Fluidized Bed Gasifier: Design and Fabrication

2020 ◽  
pp. 1-11
Author(s):  
O. R. Akinyemi ◽  
N. G. Olaiya
Keyword(s):  
Fluidized Bed ◽  
Steel Plate ◽  
External Surface ◽  
Fluidized Bed Reactor ◽  
Combustible Gas ◽  
University Of Technology ◽  
Synthetic Gas ◽  
Ondo State ◽  
Fluidized Bed Gasifier ◽  
Distributor Plate

Aims: This research involves the development of a sawdust fired fluidized bed reactor for the production of synthetic gas for domestic cooking. Study Design: A sawdust fired fluidized bed reactor using AutoCAD inventor. Place and Duration of Study: Department of Mechanical Engineering, Federal University of Technology, Akure Ondo state Nigeria. Methodology: The reactor consists of a hopper, rolled mild steel plate frame lined with clay which forms the frame, air distributor plate and five radially spaced tuyeres. The reactor is fed with pelletized sawdust, retain heat within it and maintain a temperature of 50⁰C at the external surface to minimize burns. Results: Air was forced into the plenum, after which the air distributor plate evenly distributed jets of air in the bed resulting in complete and incomplete combustion. Combustible gas was produced after 30 minutes and used to boil water. Conclusion: The sawdust fired fluidized bed reactor is recommended for domestic household use.

scholarly journals Analysis of the Synthetic Gas Production from Saw Dust Gasification

2018 ◽  
pp. 1-11
Author(s):  
Akinyemi Oluwaseyi Raphael ◽  
Olaiya Niyi Gideon
Keyword(s):  
Experimental Tests ◽  
Volatile Matter ◽  
Gas Production ◽  
Lower Percentage ◽  
Heating Value ◽  
Combustible Gas ◽  
University Of Technology ◽  
Synthetic Gas ◽  
Ondo State ◽  
Fluidized Bed Gasifier

Aims: Produce combustible gas from sawdust for domestic house use. Study Design: A fluidized bed gasifier suitable for sawdust gasification was used. Place and Duration of Study: The study was done at the federal university of technology akure, Ondo state Nigeria Methodology: Sawdust was first processed by converting it to pellets. Tests were carried out on the pellets using a bomb calorimeter using the ASTM-E771 standard. On experimental, the pellets were loaded into the reactor and then fired. Air was forced into the plenum, after which the air distributor plate evenly distributed jets of air in the bed resulting in complete and incomplete combustion. Results: Experimental tests showed that the pellets have a heating value of 16.36 MJ of energy per kg and a higher percentage of volatile matter of 57.62% (ASTM-E872) and a lower percentage of fixed carbon than the initial sawdust sample. The produced synthesis gas composed of methane 63.4%, Ammonia 1.09%, Carbon monoxide 0.63%, Hydrogen sulphide 0.84% and carbon dioxide 34.04%. Conclusion: The gas was ignited showing it was combustible.

scholarly journals KAJIAN TEKNOLOGI PROSES PEMBUATAN GAS SINTETIK DARI BATUBARA DAN PROSPEK PEMANFAATAN PADA INDUSTRI HILIRNYA = TECHNOLOGY REVIEW PROCESS OF SYNTHETIC GAS FROM COAL UTILIZATION AND PROSPECT IN DOWNSTREAM INDUSTRIES

2016 ◽  
Vol 10 (1) ◽  
pp. 61-70
Author(s):  
Muslim Efendi Harahap ◽  
Endro Wahju Tjahjono
Keyword(s):  
Natural Gas ◽  
Fluidized Bed ◽  
Chemical Industry ◽  
Raw Materials ◽  
Fixed Bed ◽  
Raw Material ◽  
Process Technology ◽  
Synthetic Gas ◽  
Fluidized Bed Gasifier ◽  
Coal Reserves

AbstractPotential coal reserves in Indonesia are very abundant, but which became the key issue is the utilization in Indonesia is still not optimal. One alternative to use the coal is by converting it into synthetic gas (syngas), containing primarily hydrogen (H2) and Carbon Monoxide (CO). To create synthetic gas from coal there are 4 kinds of process technology known in the world, i.e. Fixed-bed gasifier, Fluidized-bed gasifier, Entrained-bed gasifier and Molten bath gasifier. There are 3 types of chemical industry to take advantage of this synthetic gas as an alternative of their raw materials i.e., methanol, formic acid and ammonia industry. Currently they use natural gas as raw material. The more widespread use of natural gas for a variety of needs can disrupt the natural gas supply for these industries in the future. Therefore, this synthetic gas can be used as an alternative of raw material supply for these three types of chemical industry in the future. AbstrakPotensi cadangan batubara di Indonesia sangat melimpah, namun yang menjadi isu utama adalah pemanfaatannya di Indonesia masih belum optimal. Salah satu alternatif pemanfaatan batubara tersebut adalah dengan mengkonversi batubara tersebut menjadi gas sintetik (syngas) yang kandungan utamanya adalah Hidrogen (H2) dan Karbon Monoksida (CO). Untuk membuat gas sintetik dari batubara ini ada 4 macam teknologi proses yang telah dikenal di dunia yaitu Fixed-bed gasifier, Fluidized-bed gasifier, Entrained-bed gasifier dan Molten bath gasifier. Ada 3 jenis industri kimia yang dapat memanfaatkan gas sintetik ini sebagai alternatif bahan bakunya yaitu industri metanol, industri asam formiat dan industri amonia. Saat ini mereka menggunakan gas alam sebagai bahan bakunya. Semakin meluasnya penggunaan gas alam untuk berbagai macam kebutuhan dapat menyebabkan pasokan gas alam untuk ketiga jenis industri ini terganggu di kemudian hari. Oleh karena itu gas sintetik ini dapat dimanfaatkan sebagai alternatif pasokan bahan baku untuk ketiga jenis industri kimia tersebut kedepannya.

Conceptual Design and Preliminary Hydrodynamic Study of an Agro Biomass Bench Gasification Fluidized Bed Reactor

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Anastasia Zabaniotou ◽  
Vasiliki Skoulou ◽  
George Koufodimos ◽  
Zissis Samaras
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Agricultural Residues ◽  
External Diameter ◽  
Minimum Fluidization Velocity ◽  
Production Activity ◽  
Hydrodynamic Study ◽  
Fluidized Bed Gasifier ◽  
Bed Material ◽  
Theoretical Results

Theoretical and experimental analysis was conducted in a bench scale, atmospheric fluidized bed gasifier, designed and constructed for exploitation of residues issued from olive oil production activity and other agricultural residues. Research was focused on the effect of bed material quantity and particle size diameter on the fluidization quality, characterized by regarding bed pressure drop and minimum fluidization velocity. Experiments were carried out, under cold conditions, with a bed with an external diameter of 60 mm (internal 54,4 mm), and a comparison of the first experimental data with theoretical results that addressed the validity of the theoretical model.

Removal of microcystin-LR from drinking water with TiO2-coated activated carbon

2004 ◽  
Vol 4 (5-6) ◽  
pp. 21-28
Author(s):  
S.-C. Kim ◽  
D.-K. Lee
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Synergistic Effect ◽  
Fluidized Bed ◽  
Continuous Flow ◽  
High Surface ◽  
High Surface Area ◽  
Fluidized Bed Reactor ◽  
Exterior Surface ◽  
Tio2 Particles

TiO2-coated granular activated carbon was employed for the removal of toxic microcystin-LR from water. High surface area of the activated carbon provided sites for the adsorption of microcystin-LR, and the adsorbed microcystin-LR migrated continuously onto the surface of TiO2 particles which located mainly at the exterior surface in the vicinity of the entrances of the macropores of the activated carbon. The migrated microcystin-LR was finally degraded into nontoxic products and CO2 very quickly. These combined roles of the activated carbon and TiO2 showed a synergistic effect on the efficient degradation of toxic microcystin-LR. A continuous flow fluidized bed reactor with the TiO2-coated activated carbon could successfully be employed for the efficient photocatalytic of microcystin-LR.

Influence of Seeding Conditions on Initial Biofilm Development during the Startup of Anaerobic Fluidized Bed Reactors

1989 ◽  
Vol 21 (4-5) ◽  
pp. 157-165 ◽  
Author(s):  
F. Ehlinger ◽  
J. M. Audic ◽  
G. M. Faup
Keyword(s):  
Fluidized Bed ◽  
Future Development ◽  
Protein Concentration ◽  
Specific Activity ◽  
Fluidized Bed Reactor ◽  
Fluidized Bed Reactors ◽  
Support Material ◽  
Biofilm Development ◽  
Initial Biofilm

The characterization of the biofilm of an anaerobic fluidized-bed reactor was completed under standard conditions. The distribution of the fixed protein concentration depended on the level in the reactor. The protein concentration reached 1520 µg.g−1 of support at the top of the reactor and only 1200 µg.g−1 at the bottom after 504 hours of operation but the specific activity of the biofilm was 33×10−4 µM acetate.h−1.mg−1 proteins at the bottom and only 26×10−4 µM.h−1.mg−1 at the top. The efficiency of a fluidized bed reactor and the composition of the biofilm changed with an increase of the pH from 7 to 8.5 during the seeding of the support material. Future development of the biofilm and the specific activity of the support were affected.

The Kinetics of Glucose Decomposition with Sulfate Reduction in the Anaerobic Fluidized Bed Reactor

1993 ◽  
Vol 28 (2) ◽  
pp. 135-144 ◽  
Author(s):  
S. Matsui ◽  
R. Ikemoto Yamamoto ◽  
Y. Tsuchiya ◽  
B. Inanc
Keyword(s):  
Sulfate Reduction ◽  
Fluidized Bed ◽  
Kinetic Equations ◽  
Fluidized Bed Reactor ◽  
Order Reaction ◽  
First Order Reaction ◽  
First Order ◽  
Glucose Decomposition ◽  
Reaction Equations ◽  
Kinetics Of

Using a fluidized bed reactor, experiments on glucose decomposition with and without sulfate reduction were conducted. Glucose in the reactor was mainly decomposed into lactate and ethanol. Lactate was mainly decomposed into propionate and acetate, while ethanol was decomposed into propionate, acetate, and hydrogen. Sulfate reduction was not involved in the decomposition of glucose, lactate, and ethanol, but was related to propionate and acetate decomposition. The stepwise reactions were modeled using either a Monod expression or first order reaction kinetics in respect to the reactions. The coefficients of the kinetic equations were determined experimentally. The modified Monod and first order reaction equations were effective at predicting concentrations of glucose, lactate, ethanol, propionate, acetate, and sulfate along the beight of the reactor. With sulfate reduction, propionate was decomposed into acetate, while without sulfate reduction, accumulation of propionate was observed in the reactor. Sulfate reduction accelerated propionate conversion into acetate by decreasing the hydrogen concentration.

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