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Nor Hakimin Abdullah - One of the best experts on this subject based on the ideXlab platform.
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Preliminary study on properties of small diameter wild Acacia Mangium species aspotential biomass energy sources
2016Co-Authors: Mohd Sukhairi Mat Rasat, Muhammad Iqbal Ahmad, Mohd Hazim Mohamad Amini, Razak Wahab, Puad Elham, Mohd Hafiz Jamaludin, Mohamad Faiz Mohd Amin, Nor Hakimin AbdullahAbstract:Currently, the primary energy supply in Malaysia is dominant by non-renewable energy sources such oil, natural gas and coal which contributed to the scarcity of these sources and occurrence of global warming. This phenomenon raises the public concerns to diversify the energy sources to sustain energy availability. To address these predicaments, biomass sources is among the prominent alternative energy sources since it is renewable and possesses minimal harms to the environment. Thus, the woody plant with high growth rate and high energy content that can be used to serve as potential biomass energy sources. In this study, small diameter (5-8cm) of wild Acacia Mangium species have been determined and compared accordingly three (3) different portions (bottom, middle and top) and two (2) different particle sizes (0.5 and 1.5mm). The analysis conducted to determine the properties of raw material of Acacia Mangium as biomass energy sources were proximate, physical and energy content properties. The result obtained for the energy content analysis of small diameter wild Acacia Mangium has a mean calorific value range from 16.35 to 18.35MJ/kg between portions and particle sizes. In order to determine the effect of portions and particle sizes on each of the proximate, physical and energy content properties, two-way ANOVA was performed. It shows that both the portions and particle sizes have significant effect on calorific value (energy content) of small diameter wild Acacia Mangium at 99% of confidence level. In a nutshell, the biomass energy properties of small diameter wild Acacia Mangium with different portions and particle sizes were being determined.
Ahmad Nuruddin Zailani - One of the best experts on this subject based on the ideXlab platform.
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Chemical Properties of small diameter wild Acacia Mangium Species.
2016Co-Authors: Ahmad Nuruddin ZailaniAbstract:Acacia Mangium is an exotic species grows wildly and widely planted and in Malaysia, in an effort for reforestation and also known to be used in pulp, furniture and paper industries. The objectives of this study is to detennine five (5) chemical properties (extractives, holocellulose, α-cellulose, hemicellulose and lignin) in three (3) portions (bottom, middle and top), and also two (2) parts (wood and bark) of small diameter wild Acacia Mangium. Samples was collected from Bandar Jeli, approximately 10 kilometres from UMK Jeli campus, Kelantan with DBH around 5-8cm. Samples are then ground using laboratory grade mill into powder form for chemical analysis. All analysis were done according to TAPPI standard method, except hemicellulose, which data was collected through equation. All data and results were statistically analysed using two-way ANOVA and Tukey’s Post Hoc test. Results acquired reveals that extractives content is the highest in bottom portion, bark part (15 .03%). Highest holocellulose percentage can be found in top portion of wood part (85.99%). Highest α-cellulose content is in top portion of wood part (49.84%). Highest hemicellulose content can be found in top portion of wood part (36.15%). Lignin percentage is the highest in bottom portion of bark part (31 .18%). This study has determined small diameter Wild Acacia Mangium as a useful alternative resource in pulp and furniture industries.
Liang Hong-wen - One of the best experts on this subject based on the ideXlab platform.
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Density and Drying Characteristics for Various Ages of Acacia Mangium
China Wood Industry, 2006Co-Authors: Liang Hong-wenAbstract:An experiment was conducted to study the density and drying characteristics of 7,10 and 20 year-old Acacia Mangium samples that were collected from the Gaofeng forest farm in Guangxi Province.Results found that the average air-dried density,basic density(based on moisture content at 12%) and oven-dried density were 0.534～0.588 g/cm~3,0.452～0.513 g/cm~3,0.498～0.545(g/cm~3) respectively.The density for air-dried samples was at the medium level compared with most domestic wood.The grade of drying characteristics with respect to initial check,inner check cross-section deformation,twisting deformation as well as drying speed for Acacia Mangium is level(3～4.)The results show that the density of Acacia Mangium tends to increase as it ages and that the older it is,the better are the drying characteristics with a grade decrease of only 1 or 2 levels.
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Relativity of Content of Extractive with Acid-alkali Property of Acacia Mangium Willd Wood
Journal of Nanjing Forestry University, 2004Co-Authors: Liang Hong-wenAbstract:The content of extractive and acid-alkali property of Acacia Mangium Willd woods were analyzed and their relationships were discussed.The result shows:(1)Acacia Mangium Willd wood shows acidity and its pH is 5.34,the acid buffering capacity and alkali buffering capacity are 0.142 mmol and 0.053 mmol respectively,the extractive contents of cold-water,hot-water,1% NaOH and benzene-alcohol are 4.84%,5.75%,15.98% and 6.09% respectively.(2)the heartwood acid buffering capacities,the heartwood extractive contents of cold-water,hot-water,1% NaOH and benzene-alcohol are higher than sapwood,and decreased with the trunk height,the heartwood pH and alkali buffering capacity are lower than sapwood,and increased with the trunk height.(3)the pH shows negative correlation with the acid buffering capacity,the extractive contents of hot-water,1% NaOH and benzene-alcohol,and positive correlation with alkali buffering capacity and extractive content of cold-water.
Nur Syazni Adam - One of the best experts on this subject based on the ideXlab platform.
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Wood Quality of Acacia Hybrid and Second-Generation Acacia Mangium
BioResources, 2013Co-Authors: Ismail Jusoh, Farawahida Abu Zaharin, Nur Syazni AdamAbstract:Two new tree variants, namely Acacia hybrid and second-generation Acacia Mangium, have been introduced in plantation forests in Sarawak, Malaysia, and their wood qualities were examined. The mean basic density of Acacia hybrid was comparable with Acacia Mangium. However basic density and strength properties of second-generation A. Mangium were significantly lower compared to Acacia hybrid. The mean fibre length and fibre wall thickness in the hybrid were found to be greater than that of second-generation A. Mangium. Fibre diameter and fibre lumen diameter of Acacia hybrid were smaller compared to second-generation A. Mangium. Runkel and slenderness ratios of Acacia hybrid and second-generation A. Mangium fibres showed that they were suitable for pulp and paper production. Acacia hybrid was more resistant to Coptotermes curvignathus attack than second-generation A. Mangium. A laboratory soil block test showed that Acacia hybrid and second-generation A. Mangium were moderately durable timbers. In summary, marked differences in wood properties and qualities were observed between Acacia hybrid and second-generation A. Mangium.
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Acacia Mangium Plantation in Sarawak and its Wood Quality
2009Co-Authors: Ismail Jusoh, Nur Syazni AdamAbstract:Plantation forestry is becoming increasingly significant in Sarawak. The Sarawak Government is committed to establish commercial plantations and, by the year 2020, one million hectares of its land is targeted to be planted with forest trees. This is essential as the future of timber processing industries in Sarawak is dependent on the availability of logs. The objectives of this paper were to examine the status of Acacia Mangium as the major plantation species in Sarawak and asses its wood quality by evaluating its inherent wood properties. To date about 289,816 ha plantation forests have been established in Sarawak and Acacia Mangium make up 74% of the planted area. New planting material of A. Mangium has been introduced and planted in Sarawak that acquire many desirable properties such as faster growth, straighter bole, less tapering and resistant to heart-rot. The new breeds are known as Acacia hybrid, which is meant to produce wood and second-generation Acacia Mangium also known as A. Mangium superbulk planted for fibre production to be used especially for making fibreboard. Results showed that basic density of seven years old Acacia hybrid and second-generation Acacia Mangium was 472 kg/m 3 and 336 kg/m 3 , respectively. The strength properties of second-generation Acacia Mangium significantly low compared to Acacia hybrid. The average fibre length and fibre wall thickness in the hybrid were 962 μm and 2.21 μm, respectively and were found to be greater than in second-generation Acacia mangiun (901 μm and 1.88 μm). Fibre diameter (17.16 μm) and fibre lumen diameter (12.75 μm) in Acacia hybrid were smaller than that of second-generation Acacia Mangium. Acacia hybrid was more resistance to Coptotermes sp. attack than second-generation Acacia Mangium. Laboratory soil block test showed that Acacia hybrid and second-generation Acacia Mangium were moderately durable timbers. This study indicated that marked differences in wood properties and qualities between Acacia hybrid and second-generation Acacia Mangium. Further study is required to accurately assess the wood properties of both Acacias because of variation effects due to locations, growth characteristics and silvicultural practices.
Mohd Sukhairi Mat Rasat - One of the best experts on this subject based on the ideXlab platform.
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Preliminary study on properties of small diameter wild Acacia Mangium species aspotential biomass energy sources
2016Co-Authors: Mohd Sukhairi Mat Rasat, Muhammad Iqbal Ahmad, Mohd Hazim Mohamad Amini, Razak Wahab, Puad Elham, Mohd Hafiz Jamaludin, Mohamad Faiz Mohd Amin, Nor Hakimin AbdullahAbstract:Currently, the primary energy supply in Malaysia is dominant by non-renewable energy sources such oil, natural gas and coal which contributed to the scarcity of these sources and occurrence of global warming. This phenomenon raises the public concerns to diversify the energy sources to sustain energy availability. To address these predicaments, biomass sources is among the prominent alternative energy sources since it is renewable and possesses minimal harms to the environment. Thus, the woody plant with high growth rate and high energy content that can be used to serve as potential biomass energy sources. In this study, small diameter (5-8cm) of wild Acacia Mangium species have been determined and compared accordingly three (3) different portions (bottom, middle and top) and two (2) different particle sizes (0.5 and 1.5mm). The analysis conducted to determine the properties of raw material of Acacia Mangium as biomass energy sources were proximate, physical and energy content properties. The result obtained for the energy content analysis of small diameter wild Acacia Mangium has a mean calorific value range from 16.35 to 18.35MJ/kg between portions and particle sizes. In order to determine the effect of portions and particle sizes on each of the proximate, physical and energy content properties, two-way ANOVA was performed. It shows that both the portions and particle sizes have significant effect on calorific value (energy content) of small diameter wild Acacia Mangium at 99% of confidence level. In a nutshell, the biomass energy properties of small diameter wild Acacia Mangium with different portions and particle sizes were being determined.