EFFECT OF FUEL MOISTURE AND AIRFLOW RATE ON COMBUSTION CHARACTERISTICS OF COCONUT SHELL IN A FIXED BED

2018 ◽  
Author(s):  
Kaio Pandolfi Pessotti ◽  
Joana Freitas Campana ◽  
Carlos Eduardo Silva Abreu
Keyword(s):  
Fixed Bed ◽  
Combustion Characteristics ◽  
Coconut Shell ◽  
Airflow Rate ◽  
Fuel Moisture

scholarly journals Gasification and Power Generation Characteristics of Rice Husk, Sawdust, and Coconut Shell Using a Fixed-Bed Downdraft Gasifier

2021 ◽  
Vol 13 (4) ◽  
pp. 2027
Author(s):  
Md. Emdadul Hoque ◽  
Fazlur Rashid ◽  
Muhammad Aziz
Keyword(s):  
Rice Husk ◽  
Fixed Bed ◽  
Cost Effective ◽  
Coconut Shell ◽  
Energy Sources ◽  
Airflow Rate ◽  
Gas Generation ◽  
Biomass Feedstocks ◽  
Downdraft Gasifier ◽  
Synthetic Gas

Synthetic gas generated from the gasification of biomass feedstocks is one of the clean and sustainable energy sources. In this work, a fixed-bed downdraft gasifier was used to perform the gasification on a lab-scale of rice husk, sawdust, and coconut shell. The aim of this work is to find and compare the synthetic gas generation characteristics and prospects of sawdust and coconut shell with rice husk. A temperature range of 650–900 °C was used to conduct gasification of these three biomass feedstocks. The feed rate of rice husk, sawdust, and coconut shell was 3–5 kg/h, while the airflow rate was 2–3 m3/h. Experimental results show that the highest generated quantity of methane (vol.%) in synthetic gas was achieved by using coconut shell than sawdust and rice husk. It also shows that hydrogen production was higher in the gasification of coconut shell than sawdust and rice husk. In addition, emission generations in coconut shell gasification are lower than rice husk although emissions of rice husk gasification are even lower than fossil fuel. Rice husk, sawdust, and coconut shell are cost-effective biomass sources in Bangladesh. Therefore, the outcomes of this paper can be used to provide clean and economic energy sources for the near future.

Effect of air preheating and fuel moisture on combustion characteristics of corn straw in a fixed bed

2008 ◽  
Vol 49 (12) ◽  
pp. 3560-3565 ◽  
Author(s):  
Wei Zhao ◽  
Zhengqi Li ◽  
Guangbo Zhao ◽  
Fangshi Zhang ◽  
Qunyi Zhu
Keyword(s):  
Fixed Bed ◽  
Combustion Characteristics ◽  
Fuel Moisture ◽  
Corn Straw

EFFECT OF MOISTURE AND PARTICLE SIZE ON THE COMBUSTION CHARACTERISTICS OF SEWAGE SLUDGE IN A FIXED BED

2018 ◽  
Author(s):  
Joana Freitas Campana ◽  
Kaio Pandolfi Pessotti ◽  
Carlos Eduardo Silva Abreu ◽  
Patrick de Jesus
Keyword(s):  
Particle Size ◽  
Sewage Sludge ◽  
Fixed Bed ◽  
Combustion Characteristics ◽  
Effect Of Moisture

Preparation of Sorbent Loaded with Nano-CuO for Room Temperature to Remove of Hydrogen Sulfide

2013 ◽  
Vol 475-476 ◽  
pp. 1329-1333 ◽  
Author(s):  
Fen Li ◽  
Jin Wei ◽  
Ying Yang ◽  
Guang Hui Yang ◽  
Tao Lei
Keyword(s):  
Grain Size ◽  
Hydrogen Sulfide ◽  
Metal Oxide ◽  
Copper Oxide ◽  
Calcination Temperature ◽  
Room Temperature ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Coconut Shell ◽  
Load Rate

In this paper, an efficient metal oxide sorbents for the deep removal of H2S were synthesized using equal volume impregnation (EVIM) method. Modified coconut shell charcoal was selected as support to deposite the particles of copper oxide onto the surface. And copper nitrate were selected as the active component precursors in the preparation process of sorbents. Sorption experiments were carried out at room temperature in fixed-bed reactor. The grain size and crystal form of loading metals were characterized by X-ray diffraction (XRD). We investigated the effects of modifier onto coconut shell charcoal, load rate of metal oxide and calcination temperature on the desulfurization activity of the sorbent. Results show that the best modifier for coconut shell charcoal is KOH, which is significantly better than the other modifiers. And the optimum load rate is 20%(wt), the optimum calcination temperature is 300°C. Copper oxide onto the surface of modified coconut shell charcoal proved to be monoclinic nanoparticles with grain size of 18.7nm. Sulfidation test was carried out on the condition of i) the concentration of hydrogen sulfide gas (mixed with nitrogen ) is 1024.2ppm and ii) gas velocity is 20ml/min, iii) 0.1g sample in the middle of the fixed-bed reactor (length: 450 mm, interior diameter: 5 mm) to test. The sample show excellent sulfur removal efficiency and its breakthrough time is up to 287 min on this condition.

Nitrogen-Bearing Emissions From Burning Corn Straw in a Fixed-Bed Reactor: Effects of Fuel Moisture, Torrefaction, and Air Flowrate

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
Emad Rokni ◽  
Yu Liu ◽  
Xiaohan Ren ◽  
Yiannis A. Levendis
Keyword(s):  
Moisture Content ◽  
Hydrogen Cyanide ◽  
Fossil Fuels ◽  
Environmental Pollutants ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Fuel Moisture ◽  
Corn Straw ◽  
Renewable Biomass ◽  
Torrefied Biomass

Combustion-generated emissions of acid gases, such as nitrogen-bearing species, constitute environmental pollutants and some are subjected to environmental regulations. Assessment of such emissions is important to decide what systems need to be put in place for their control. This applies to both conventional fossil fuels and for alternative environmentally friendlier fuels, such as renewable biomass. This research investigated the emissions of nitrogen-bearing gases, which evolve from combustion of biomass (corn straw) in a fixed bed furnace, as a function of specific air flowrate (m˙air) through the bed and of moisture content of the fuel. The effect of torrefaction of corn straw on the combustion-generated nitrogen bearing emissions was also examined. The predominant nitrogen-bearing species in the combustion effluents were hydrogen cyanide (HCN), nitrogen oxide (NO), and ammonia (NH3). Increasing m˙air through the bed, to enhance the combustion rate, increased the emissions of HCN, NO, and NH3. As the m˙air through the bed increased by a factor of 5, the amounts of HCN, NO, and NH3 gases increased by factors of 3–4. As the moisture content of the biomass was reduced by drying, the combustion-generated emissions of NO increased mildly, whereas those of both NH3 and HCN decreased. Furthermore, the combustion-generated emissions of NO and NH3 from torrefied biomass were found to be higher than those from raw biomass. In contrast, the combustion-generated emissions of HCN from torrefied biomass were found to be lower than those generated from raw biomass.

Combustion characteristics of wheat straw in a fixed bed

2016 ◽  
Vol 38 (7) ◽  
pp. 1007-1013 ◽  
Author(s):  
Zoran Cepic ◽  
Branka Nakomcic-Smaragdakis ◽  
Biljana Miljkovic ◽  
Ljiljana Radovanovic ◽  
Slavko Djuric
Keyword(s):  
Wheat Straw ◽  
Fixed Bed ◽  
Combustion Characteristics

scholarly journals Proses Gasifikasi Limbah Padat Aren Menggunakan Fixed-Bed Updraft Gasifier dengan Variasi Jenis Bahan

2018 ◽  
Vol 2 (2) ◽  
pp. 8
Author(s):  
Ucik Ika Fenti Styana ◽  
Muhammad Sigit Cahyono
Keyword(s):  
Solid Waste ◽  
Raw Materials ◽  
Fixed Bed ◽  
Proximate Analysis ◽  
Coconut Shell ◽  
Gas Content ◽  
Biomass Waste ◽  
Gasification Process ◽  
Palm Sugar ◽  
Materials Used

<p>Salah satu potensi sumber energi di Indonesia adalah limbah biomasa berupa limbah padat industri aren. Tujuan penelitian ini adalah untuk mengetahui pengaruh jenis bahan terhadap suhu reaktor dan efisiensi proses gasifikasi limbah padat aren. Bahan baku yang digunakan didapatkan dari Sentra Industri Tepung Aren di Dusun Daleman, Kecamatan Tulung, Kabupaten Klaten. Sebelum diproses bahan dikeringkan terlebih dahulu dengan dijemur di bawah sinar matahari selama sehari, kemudian dilakukan analisa proksimat. Variabel penelitian adalah jenis bahan berupa limbah padat aren murni, campuran limbah padat aren dan tempurung kelapa, serta tempurung kelapa murni. Proses gasifikasi diawali dengan memasukkan bahan ke dalam reaktor tipe <em>Fixed-bed Updraft Gasifier</em>, kemudian dinyalakan sampai keluar gas yang bisa terbakar dan diuji selama satu jam. Syn gas yang terbentuk dianalisa kandungan gasnya, kemudian dibakar untuk mengetahui efisiensinya. Hasil penelitian menunjukkan bahwa jenis bahan mempengaruhi suhu proses di dalam reaktor, dimana suhu optimal dicapai pada gasifikasi tempurung kelapa murni, yaitu proses pengeringan pada suhu 120 °C, pirolisis 340 °C, Reduksi 650 °C, dan oksidasi 721 °C. Gas yang dihasilkan tersebut dapat terbakar selama 15 menit, dibandingkan campuran limbah padat aren - tempurung yang terbakar 8 menit dan limbah padat aren murni yang hanya mampu terbakar 1 menit.</p><p><em>One of the potential energy sources in Indonesia is biomass waste in the form of palm sugar solid waste. The purpose of this study was to determine the effect of the type of material on the reactor temperature and the efficiency of the sugar palm solid waste gasification process. The raw materials used were obtained from the Palm Sugar Flour Industrial Center in Daleman Hamlet, Tulung District, Klaten Regency. Before processing the material is first dried by drying it in the sun for a day, then proximate analysis is done. The research variable is the type of material in the form of pure sugar palm solid waste, a mixture of palm sugar solid waste and coconut shell, and pure coconut shell. The gasification process is initiated by inserting the material into the Fixed-bed Updraft Gasifier type reactor, then igniting the flammable gas and testing it for one hour. The syn gas formed is analyzed for its gas content, then burned to find out its efficiency. The results showed that the type of material influences the process temperature inside the reactor, where the optimum temperature is achieved in pure coconut gas gasification, namely the drying process at 120 °C, pyrolysis 340 °C, Reduction 650 °C, and oxidation 721 °C. The resulting gas can burn for 15 minutes, compared to a mixture of aren solid waste - shells that burn for 8 minutes and pure aren solid waste that can only burn for 1 minute.</em></p>

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