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Physicomechanical Properties of rice husk Pellets for Domestic Combustion in Myanmar

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Journal of Mechanics Engineering and Automation 2020年第2期10卷 66-72页

作者： Swe Zin Tun NweNwe Win Stefan Beisl Anton Friedl Department of Chemical Engineering Yangon Technological University Yangon 11011Myanmar 2.Department of Chemical EngineeringWest Yangon Technological UniversityYangon 11402Myanmar Institute of Chemical Environmental and Bioscience EngineeringTU WienGetreidemarkt 9/166A-1060Austria

Myanmar produces 26.21 million tons of rice annually that results in 5.24 million tons of remaining rice husk of which only around 30%is used for electricity and heat production in the *** needs more energy consumption to develop the agricultural economy and biomass energy in the future of the *** proximate and ultimate analysis of rice husk and produced rice husk pellets were determined as well as analyzing the physicochemical and mechanical *** rice husk pellets without doing size reduction were manufactured in a ring die pellet *** and pellet-formed rice husk were compared based on the ISO 17225-6 standard for the characterization of herbaceous *** increased the bulk density of rice husk by a factor of *** net calorific value of Myanmar rice husk pellets was 3.67 kW h/kg with a moisture content of 7.48%and the large amount of ash forming *** result showed that the diameter,length,and durability of the produced pellets complied with ISO 17225-6 ***,the net calorific value and bulk density could only be partially fulfilled according to the ISO standard depending on the process parameters.

关键词： rice husk pellets bulk density calorific value durability

Preparation of Ultrafine SiO2 Powder from rice husk and Properties of Its Infrared Spectrum

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Journal of Measurement Science and Instrumentation 2011年第3期2卷 226-229页

作者：晋日亚胡双启谭迎新 College of Chemical & Environmental Engineering North University of China

This paper discussed impact of temperature on the size distribution in preparing ultrafine silica from rice *** samples prepared were analyzed with infrared spectrum,and the relation between the particle size and intensity of characteristic absorption peak of IR at center around 1 100 cm-1 was disscussed with the baseline *** show that when the temperature is 650 ℃ and roasting time is 11 h,at optimal reaction conditions,the size distribution of the ultrafine silica powder prepared is relatively concentrated,and the average particle size is 199.5 ***,the characteristic absorption band of IR is broadening gradually along with particle size decreasing.

关键词： rice husk ultrafine powder SiO2 infrared spectrum

Extension of rice husk gasification technology for electricity generation in Cambodia

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Extension of rice husk gasification technology for electrici...

Experimental Study of Carbonization on Bamboo Black Liquor Lignin and rice husk

2011 2nd International Conference on Advances in Energy Engineering(ICAEE)

作者： Orkide Akgün Jyrki Luukkanen Finland Futures Research Centre University of Turku

Reliable and affordable electricity is one of the biggest problems in *** 24%of the population has an access to electricity while the others suffer from insufficient electricity *** paper shows the current situation in Cambodian electricity facilities and offers rice husk gasification systems as an option for electricity *** this paper rice husk gasification system has been inspired by Batt Daeng Electrification Company in Kampoung Speu province in *** idea of the study focuses on the extension of biomass gasification technology and calculates the potential of using all rice husk produced in a year in *** rice husk produced in 2007 has a potential to generate about 1377 GWh electricity yearly in a gasification system similar to one Batt Daeng Electricity Company *** amount of electricity is comparable with the total electricity consumption in the same year.

关键词： rice husk Gasification Electricity in Cambodia Cambodia

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Experimental Study of Carbonization on Bamboo Black Liquor L...

作者： Niaz Muhammad khan 南京理工大学

学位级别：硕士

Black liquor is the main waste remained from paper industry which composed mainly of some organic compounds as a soluble salt and a high portion of sodium *** black liquor contains a large amount of lignin,which is not only the main participants in pollution,but also have a sort of significant *** is a feasible way to deal with *** the bamboo black liquor lignin is used effectively as a resource by carbonization,it not only can reduce the quality of waste,but also obtain very substantial economic *** is the best papermaking material except wood,and it is suitable for the manufacture of mid-high-grade *** order to be the similar to the actual industrial engineering process,bamboo black liquor lignin dry powder and rice husk were carbonized in muffle *** carbonization temprature were 700℃,650℃,600℃,550℃,500℃,450 ℃,400 ℃,350℃ and 300℃ *** influence of carbonized temperature and residence time on the carbonized charring of bamboo black liquor lignin dry powder and rice husk are *** rice husk carbonization,it can be roughly divided into four stages:pre-drying stage,drying stage,rapid weightlessness stage,and slow weightlessness stage;with the increase of temperature,the mass loss of biomass increases;at the same time,with the area the increase in the residence time of the section increases the mass loss of the biomass,but when it increases to a certain extent,the quality loss is *** addition,based on the data obtained from the experiment,thermal calculations were made on the rice husk fuel and a temperature scale was *** provides basic data for the production,use,and development of combustion equipment for biomass carbonized fuels as well as the selection of types of combustion *** bamboo black liquor lignin carbonization,the coke residue yield was about 60.00%,59.57%,59.49%,60.39%,61.52%,71.07%,74.08%,79.93%and 82.97%.The optimum carbonization temperature was 450℃ and the

关键词： Biomass Bamboo black liquor Lignin Industrial analysis Carbonization rice husk

Removal of Cr(VI)from aqueous solution by rice-husk-based activated carbon prepared by Dual-mode heating method

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Carbon Resources Conversion 2023年第2期6卷 76-84页

作者： Xinchi Zhang Shiliang Wu Yuan Liu Ziwei Wang Huiyan Zhang Rui Xiao Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China

rice husk-based activated carbon was prepared with the help of zinc chloride using microwave and electrical dual-mode *** pore characteristics and chemical properties of rice husk-based activated carbon(RH-AC)were characterized by BET,XRD,Raman spectra,FTIR and pHIEP(pH of isoelectric point).The specific surface area of RH-AC is 1719.32 m^(2)/g with a total pore volume of 1.05 cm^(3)/*** performance of RH-AC for removing Cr(VI)from aqueous solution was examined considering the variation of the contact time(0-120 min),pH value(2.0-9.0),adsorbent dose(0.5-3.0 g/L),initial concentration(28-145 mg/L)and solvent temperature(15-45℃).The ideal pH for Cr(VI)removal is between 2.0 and 3.0 with the equilibrium time of 90 min,achieving the maximum adsorption capacity of 56.82 mg/g with the pH of *** study on the established kinetic models and isotherms to simulate the removal of Cr(VI)by RH-AC was carried out to sort out the inherent mechanism of the *** agreements could be obtained by the pseudo-second-order kinetic model and Langmuir,Freundlich and Tempkin isothermal *** from Body model simulation suggest that external mass transfer was the essential cause for rate-controlling in the adsorption process of Cr(VI).

关键词： Activated carbon rice husk Cr(VI) Adsorption Isothermal model

Antioxidant Activities and Characterization of Polyphenols from Selected Northern Thai rice husks: Relation with Seed Attributes

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rice science 2023年第2期30卷 148-159,I0039页

作者： Jiratchaya WISETKOMOLMAT Chaiwat ARJIN Surat HONGSIBSONG Warintorn RUKSIRIWANICH Chutamat NIWAT Pimsiri TIYAYON Sansanee JAMJOD Supapohn YAMUANGMORN Chanakan PROM-U-THAI Korawan SRINGARM Department of Animal and Aquatic Sciences Faculty of AgricultureChiang Mai UniversityChiang Mai 50200Thailand School of Health Science Research Research Institute for Health SciencesChiang Mai UniversityChiang Mai 50200Thailand Department of Pharmaceutical Sciences Faculty of PharmacyChiang Mai UniversityChiang Mai 50200Thailand Food Science and Technology Program School of Agro-IndustryMae Fah Luang UniversityChiang Rai 57100Thailand School of Agricultural Resources Chulalongkorn UniversityBangkok 10330Thailand Agronomy Division Department of Plant and Soil SciencesFaculty of AgricultureChiang Mai UniversityChiang Mai 50200Thailand Lanna rice Research Center Chiang Mai UniversityChiang Mai 50200Thailand Cluster of Research and Development of Pharmaceutical and Natural Products Innovation for Human or Animal Chiang Mai UniversityChiang Mai 50200Thailand

rice production generates a significant amount of agricultural waste. This study aimed to give results related to the existence of antioxidant phenols in agricultural waste of selected Northern Thai rice varieties. The antioxidant activities, contents of total flavonoids and phenolic compounds in the ethanolic rice husk extract were evaluated. The highest antioxidant activities were found in the variety PES1CMU, with 2,2’-azinobis-3-ethyl-benzothiazoline-6-sulfonic acid and 2,2-diphenyl-1-picrylhydrazyl as 679.66 and 4.16 mmol/(L·g) trolox equivalent, respectively, ferric reducing antioxidant power as 0.87 mmol/(L·g) Fe2+, total phenolic content as 29.90 mmol/(L·g) gallic acid and total flavonoid content as 12.16 mg/g catechin equivalent. Polyphenol compounds were identified mainly by standard polyphenols using the liquid chromatography mass spectrometry, with the highest contents of phytic acid, o-coumaric acid, naringin and kaempferol. The non-glutenous and wetland ecotypes of rice husk samples were the richest in antioxidant activities and polyphenol contents characterized by using principal component analysis. The glutenous rice husk contained higher antioxidant activities than the rest. Interestingly, quercetin is a significant phenolic compound that positively correlated with the overall antioxidant activities of rice husk. This finding will be relevant for future application of rice husk antioxidant components in the production of functional ingredients as well as for the food and pharmaceutical industries.

关键词： antioxidant agri-waste polyphenol rice husk seed characteristic Thai rice

Study of rice husks and Expanded Polystyrene Composites for Construction Applications

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Open Journal of Civil Engineering 2024年第3期14卷 456-468页

作者： Edem Chabi Valéry Kouandété Doko Sena Peace Hounkpè Paul Damien Amadji Emmanuel Olodo Laboratory of Rural Engineering School of Rural Engineering National University of Agriculture Ketou Benin Laboratory of Applied Energy and Mechanics (LEMA) Polytechnic School of Abomey-Calavi University of Abomey-Calavi Abomey-Calavi Benin Department of Civil Engineering Higher National School of Public Works (ENSTP) National University of Sciences Technologies Engineering and Mathematics Abomey Benin

In the current context of environmental challenges, this study focuses on developing innovative and eco-friendly composites using rice husk and recycled expanded polystyrene. This dual-responsibility approach valorizes a by-product like rice husk, often considered waste, and reuses polystyrene, a plastic waste, thereby contributing to CO2 emission reduction and effective waste management. The manufacturing process involves dissolving recycled polystyrene into a solvent to create a binder, which is then mixed with rice husk and cold-compacted into composite materials. The study examines the impact of two particle sizes (fine and coarse) and different proportions of recycled polystyrene binder. The results show significant variations in the mechanical characteristics of the composites, with Modulus of Rupture (MOR) values varying from 2.41 to 3.47 MPa, Modulus of Elasticity (MOE) ranging from 223.41 to 1497.2 MPa, and Stiffness Coefficient (K) from 5.04 to 33.96 N/mm. These characteristics demonstrate that these composites are appropriate for various construction applications, including interior decoration, panel claddings, and potentially for furniture and door manufacturing when combined with appropriate coatings. This study not only highlights the recycling of agricultural and plastic waste but also provides a localized approach to addressing global climate change challenges through the adoption of sustainable building materials.

关键词： rice husk Recycled Expanded Polystyrene Eco-Friendly Composites Waste Valorization Sustainable Construction

A Study on the Combustion Characteristics and Greenhouse Gas Emissions from rice husks with Varied Heat Fluxes

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Journal of Environmental Science and Engineering 2011年第2期5卷 154-164页

作者： E.Y. Park D.S. Park Railroad Environment Research Department Korea Railroad Research Institute Uiwang 437-050 Korea Future Modern Traffic System Engineering Department University of Science and Technology （UST） Uiwang 437-050 Korea

This paper analyzes the combustion characteristics and greenhouse gas emissions from varied heat fluxes with rice husks. In general, rice husks burnt outdoors at a lower temperature range of 300-400 ℃, which cannot assure complete combustion, thus generating a large volume of toxic air pollutants. A heat flux of 40 kW/m^2, with a cone calorimeter, is the equivalent to the 700 ℃ of an incinerator. The test result shows that the mass reduction rate of the sample at this or at a higher temperature condition was 99.5% or higher, meaning that the sample was almost completely combusted. In this study using rice husks, the amount of carbon dioxide, which is a greenhouse gas, discharged were 1.57-3.61 kg/kg. This is as high as 10 times, than produced in other studies. When the rice husks are burnt outdoors, they are not completely combusted as the combustion temperature remains low, and the rice husk residuals are continuously being combusted in a smoldering phase which creates a large volume of carbon dioxide and carbon monoxide. Therefore, it is recommended to burn rice husks at 700 ℃ or higher to minimize the carbon dioxide and carbon monoxide emissions.

关键词： Biomass burning greenhouse gas rice husk cone calorimeter heat flux.

Performance Evaluation of Novel Eco-Materials Composed of Millet husks, rice husks, and Polystyrene

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Open Journal of Composite Materials 2024年第1期14卷 33-43页

作者： Paul Damien Amadji Edem Chabi Valéry Kouandété Doko Céphas Houndedji Emmanuel Olodo Laboratory of Applied Energy and Mechanics (LEMA) Polytechnic School of Abomey-Calavi University of Abomey-Calavi Abomey-Calavi Benin Laboratory of Rural Engineering School of Rural Engineering National University of Agriculture Kétou Benin

Managing agricultural waste and expanded polystyrene (EPS) poses significant environmental and economic challenges. This study aims to create composites from millet husks, rice husks, and recycled EPS, using a manufacturing method that involves dissolving the polystyrene in a solvent followed by cold pressing. Various particle sizes and two binder dosages were investigated to assess their influence on the physico-mechanical properties of the composites. The mechanical properties obtained range from 2.54 to 4.47 MPa for the Modulus of Rupture (MOR) and from 686 to 1400 MPa for the Modulus of Elasticity in Bending (MOE). The results indicate that these composites have potential for applications in the construction sector, particularly for wood structures and interior decoration. Moreover, surface treatments could enhance their durability and mechanical properties. This research contributes to the valorization of agricultural and plastic waste as eco-friendly and economical construction materials.

关键词： Bio-Based Composites Millet husk rice husk Expanded Polystyrene Waste Valorization Sustainable Construction