scholarly journals Characterisation of Particulate Matter Emitted from Cofiring of Lignite and Agricultural Residues in a Fixed-Bed Combustor

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Nattasut Mantananont ◽  
Savitri Garivait ◽  
Suthum Patumsawad
Keyword(s):  
Particle Size ◽  
Particulate Matter ◽  
Rice Husk ◽  
Fixed Bed ◽  
Spherical Shape ◽  
Particle Morphology ◽  
Fuel Mixture ◽  
Agricultural Residues ◽  
Particulate Matter Emission ◽  
Air Supply

This study is focused on the emission of fixed bed combustor batch operated. Real-time analyser ELPI (electrical low-pressure impactor) system was used to size-segregated particulate matter emission ranging from 40 nm to 10 μm. The results show that total number concentration were3.4×103,1.6×104, and1.5×105 particles/cm3⋅kgfuel, while total mass of particles were 12.2, 8.0, and 6.5 mg/Nm3⋅kgfuelfor combustion of lignite, rice husk and bagasse, respectively. But it can be noticed that cofiring released more particulate matter. Meanwhile it was found that the effect of ratio of over-fired air to total air supply is more pronounced, since decrease in this ratio, the amount of particles are decreased significantly. For particle size distribution, it can be observed that submicron-sized particles dominate and the most prevailing size is in the range: 50 nm<Dp<100 nm, for lignite and agricultural residues. However, during cofiring of fuel mixture at 70% rice husk mass concentration, it is found that there are two major fractions of particle size; 40 nm<Dp<70 nm and 0.2 μm<Dp<0.5 μm. The analysis of particle morphology showed that the isolate shape of submicron particle produced during lignite combustion is characterised by different geometries such as round, capsule, rod, flake-like, whereas the spherical shape is obtained with combustion of rice husk.

scholarly journals Investigative Study for Low Particulate Matter Emission in Rice Husk Combustion

2020 ◽  
Vol 99 (11) ◽  
pp. 220-229
Author(s):  
Emmanuel Owoicho ABAH ◽  
Tofael AHAMED ◽  
Ryozo NOGUCHI
Keyword(s):  
Particulate Matter ◽  
Rice Husk ◽  
Particulate Matter Emission

scholarly journals Optimization and Characterization of Bio-oil Produced from Rice Husk Using Surface Response Methodology

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Ige Ayodeji Rapheal ◽  
Elinge Cosmos Moki ◽  
Aliyu Muhammad ◽  
Gwani Mohammed ◽  
Lawal Hassan Gusau
Keyword(s):  
Particle Size ◽  
Rice Husk ◽  
Fixed Bed ◽  
Production Optimization ◽  
Fixed Bed Reactor ◽  
Pyrolysis Process ◽  
Surface Response Methodology ◽  
Chemical Efficiency ◽  
Bio Oil

AbstractThe study depicts the production, optimization and characterization of bio-oil from pyrolyzed rice husk using a fabricated fixed bed reactor. The pyrolysis process was conducted with bio-oil response, bio-char response and non-condensable gases response as products. The effect of pyrolysis variables were observed by the production of the bio-oil as the response. Sixty runs of pyrolysis experiments were suggested by Box Benkhen design indicated optimum pyrolysis conditions at particle size of 2.03mm mesh, reaction time of 81.80 mins and temperature of 650oC for rice husk. The maximum bio-oil yield was obtained with 38.39% at optimum condition of the variables. The bio-oil sample obtained had better performance compared with ASTM standard. Such a determination would contribute so immensely to a significant comprehension of the chemical efficiency of the pyrolysis reaction.

scholarly journals Fixed Bed Combustion of Biomass: Particulate Matter Mitigation by Optimising Temperature and Fuel Particle Size

2018 ◽  
Vol 168 ◽  
pp. 012038
Author(s):  
Mesa Cicilia Kemunto ◽  
Enyu Wang ◽  
Xiang Gou ◽  
Ali Imran Shah ◽  
George Odhiambo Adwek
Keyword(s):  
Particle Size ◽  
Particulate Matter ◽  
Fixed Bed ◽  
Fuel Particle

scholarly journals Production and Characterisation of Bio-Oil from Agricultural Residues

2019 ◽  
Vol 16 ◽  
pp. 1-6
Author(s):  
Francis Mintah Dadzie ◽  
John Frimpong Kyei-Mensah ◽  
Michael Boakye
Keyword(s):  
Rice Husk ◽  
Fixed Bed ◽  
Biomass Concentration ◽  
Agricultural Residues ◽  
Fixed Bed Reactor ◽  
Corn Stalk ◽  
Suitable Alternative ◽  
Agricultural Produce ◽  
Bio Oil ◽  
Cassava Peel

Energy crisis have become a global issue. Africa is one of the great contributors of agricultural produce, however no efficient way is established to covert the agricultural residues to useful products. Therefore, this study was to ascertain the combining effect of the agricultural residues on the yield and quality of bio oil produced. Biomass from cassava peel, rice husk and corn stalk were obtained and prepared. The sulphur and fixed carbon contents of the biomass were less making them more environmentally friendly. Biomass (i.e cassava peel, rice husk, and corn stalk) were mixed in different concentrations of 1:1:1, 2:1:1, 1:2:1, and 1:1:2 respectively and subjected to fast pyrolysis using a fixed bed reactor. The biomass concentration which gave the highest yield of bio-oil was 2:1:1 with a yield of 55.63 %. This yield was reached at a temperature of 525 °C. However, the physicochemical properties of the high yielding bio-oil fairly satisfied the ASTM D7544 standards. Further improvement on the bio-oil will enhance its usefulness as a suitable alternative to diesel.

scholarly journals Particulate matter emission from a heavy duty diesel engine with three binary blends

2018 ◽  
Vol 22 (5) ◽  
pp. 2065-2076 ◽  
Author(s):  
Shuli Wang ◽  
Simon Sprengers ◽  
Bart Somers ◽  
Goey De
Keyword(s):  
Particle Size ◽  
Particulate Matter ◽  
Low Temperature Combustion ◽  
Particulate Matter Emission ◽  
Composition Ratio ◽  
Particulate Matter Emissions ◽  
Soot Emissions ◽  
Heavy Duty Diesel ◽  
Composition Ratios ◽  
Test Fuel

Low temperature combustion using gasoline-like fuels has the potential to pro-vide high efficiencies and extremely low NOx and soot emissions. In this study, different volume percentages (30%~70%) of iso-octane, toluene, and n-butanol are blended with n-heptane separately. These blends with different composition ratios are tested on a modified single-cylinder research engine. Also, simulations are performed using a homogeneous reactor method to know the fuel-chemical effects on particulate matter emissions. Thirdly, a composition ratio of 70% is selected to perform further experiments based on the results from the initial composition ratio experiments with a focus on the particle size distributions. It was found that if the test fuel can provide sufficient ignition delay to allow fuel to premix with air fully, the soot emissions will be low and particle size is small even if the test fuel contains a lot of aromatic compounds.

Surface energy of cellulosic materials: The effect of particle morphology, particle size, and hydroxyl number

TAPPI Journal ◽  
2015 ◽  
Vol 14 (9) ◽  
pp. 565-576 ◽  
Author(s):  
YUCHENG PENG ◽  
DOUGLAS J. GARDNER
Keyword(s):  
Particle Size ◽  
Surface Energy ◽  
Particle Morphology ◽  
Nanofibrillated Cellulose ◽  
Particle Sizes ◽  
Hydroxyl Number ◽  
Small Individual ◽  
Dispersion Component ◽  
Commercial Applications ◽  
Lower Temperature

Understanding the surface properties of cellulose materials is important for proper commercial applications. The effect of particle size, particle morphology, and hydroxyl number on the surface energy of three microcrystalline cellulose (MCC) preparations and one nanofibrillated cellulose (NFC) preparation were investigated using inverse gas chromatography at column temperatures ranging from 30ºC to 60ºC. The mean particle sizes for the three MCC samples and the NFC sample were 120.1, 62.3, 13.9, and 9.3 μm. The corresponding dispersion components of surface energy at 30°C were 55.7 ± 0.1, 59.7 ± 1.3, 71.7 ± 1.0, and 57.4 ± 0.3 mJ/m2. MCC samples are agglomerates of small individual cellulose particles. The different particle sizes and morphologies of the three MCC samples resulted in various hydroxyl numbers, which in turn affected their dispersion component of surface energy. Cellulose samples exhibiting a higher hydroxyl number have a higher dispersion component of surface energy. The dispersion component of surface energy of all the cellulose samples decreased linearly with increasing temperature. MCC samples with larger agglomerates had a lower temperature coefficient of dispersion component of surface energy.

Sign in / Sign up

Export Citation Format

Share Document