scholarly journals Evaluation of Urban Tree Leaf Biomass-Potential, Physico-Mechanical and Chemical Parameters of Raw Material and Solid Biofuel

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 818 ◽  
Author(s):  
Krzysztof Mudryk ◽  
Marcin Jewiarz ◽  
Marek Wróbel ◽  
Marcin Niemiec ◽  
Arkadiusz Dyjakon
Keyword(s):  
Bulk Density ◽  
Urban Areas ◽  
Raw Material ◽  
Leaf Biomass ◽  
Tree Leaves ◽  
Wood Pellets ◽  
Urban Tree ◽  
Solid Biofuels ◽  
Solid Biofuel ◽  
Tree Leaf

The paper presents the results of research aimed at evaluating the possibility of using selected tree leaf species to produce solid biofuels. The possibility of production of qualitative solid biofuels from urban tree leaves meets the expectations of the municipal sector. Collection of tree leaves in urban areas is very often necessary for road safety reasons, the need to collect biomass rich in dust and pollution as well as biomass infested with pests. The production of solid biofuels from tree leaves allows for effective management of this raw material with energy recovery. The performed research indicates such a possibility, and the obtained ash is used as a soil improver. The conducted research showed that the biomass of leaves of five tree species used in the experiment can be a source of raw materials for production of qualitative biofuels. The obtained pellets were characterized by properties comparable to those of classical wood pellets. The lower heating value of the obtained pellets ranged from 14.5 to 15.5 MJ∙kg−1. Physical properties of the obtained pellets described by bulk density (BD 600–660 kg∙m−3), mechanical durability (DU 90–96%), moisture (Mar 10–12.5%) indicate that these products can be used in existing combustion equipment. Preliminary analysis of the obtained ashes (determination of ash melting point, bulk density) indicates that they should not cause difficulties in ash removal systems from the combustion chamber.

scholarly journals Change in humidity of solid biofuels

2012 ◽  
Vol 50 (No. 2) ◽  
pp. 61-65
Author(s):  
P. Heneman
Keyword(s):  
Calorific Value ◽  
Considerable Effect ◽  
Raw Material ◽  
Air Humidity ◽  
Solid Biofuels ◽  
Relative Air Humidity ◽  
Solid Biofuel ◽  
Duration Of Storage ◽  
Unstable Environment ◽  
And Storage

Humidity, as one of the most important physical properties of pressed solid biofuels, affects thel calorific value of the biofuel and its consistency. Biofuel humidity depends on the initial humidity of raw material, which varies and depends on many factors. Method of manufacture and place and duration of storage have a considerable effect on solid biofuel humidity as well. Humidity of pressed solid biofuels changes not only during the pressing itself, when temperature increases by compression and a part of contained moisture evaporates, but also in the course of handling and storage under unstable environment conditions with high relative air humidity, when, on the contrary, their humidity gradually increases due to their hygroscopicity. Properties of solid biofuels change with their increasing humidity – their calorific value and consistency decreasing and the share of crumbles increasing.

scholarly journals PREDICTION FOR TOTAL MOISTURE CONTENT IN WOOD PELLETS BY NEAR INFRARED SPECTROSCOPY (NIRS)

10.6036/9935 ◽  
2021 ◽  
Vol 96 (3) ◽  
pp. 296-301
Author(s):  
MIGUEL ÁNGEL SÁNCHEZ GATÓN ◽  
MARIA ISABEL CAMPOS LABADIE ◽  
JOSE JUAN SEGOVIA PURAS
Keyword(s):  
Quality Control ◽  
Infrared Spectroscopy ◽  
Moisture Content ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Wood Pellets ◽  
Solid Biofuels ◽  
Solid Biofuel ◽  
Non Destructive ◽  
Total Moisture Content

Mankind consumes as many fossil fuels per year as nature produced during a million years. Furthermore, energy consumption has tripled in the last 60 years, and is expected to be doubled in 2050, due to the technological and economic takeoff of large emerging powers. In light of this scenario, a change in energy policies should be aimed to promote energy efficiency and the use of sustainable energy resources, such as bioenergy, safely and environmental friendly. Biomass fuels take a main role in the EU's energy and climate policies, aimed at reducing CO2 emissions and combating Climate Change. Quality control of biofuels and knowledge of their characteristics reach a large relevance in any industrial application based on the energy use of biofuels. NIRS technology (near infrared spectroscopy, Near Infrared Reflectance Spectroscopy) is based on the interaction between electromagnetic radiation and material, and now is presented as an encouraging technological tool for quality testing of solid biofuels, since it is a non-destructive and much faster and cheaper analytical technique than traditional ones, which are based on current ISO standards. That interaction appears as spectral vibrations (energy absorption or absorbance) that are properly processed, allowing to measure the most important physical-chemical properties of solid biofuels in a fast, simple and non-destructive way. Wood pellet is the highest quality solid biofuel in the current biomass market, which is regulated by ENplus® certification scheme in the European-wide, ensuring the quality of product to consumers. Low heating value is the most important parameter of solid biofuel, and is strongly linked to total moisture content, so the control of moisture is key factor during pelletizing process. The original research carried out in this work allows to present the development of a NIRS prediction model for total moisture in wood pellets, in the range of values of 5 – 10 %, providing a much faster and more automated methodology for product quality control, both in production plants of wood pellets and in power plants with wood pellets as fuel. Keywords: near infrared spectroscopy, wood pellets, quality control, moisture, prediction model

scholarly journals Basic properties of the mangrove tree branches as a raw material of wood pellets and briquettes

2021 ◽  
Vol 891 (1) ◽  
pp. 012005
Author(s):  
A Nuryawan ◽  
R S Syahputra ◽  
I Azhar ◽  
I Risnasari
Keyword(s):  
Avicennia Marina ◽  
Raw Material ◽  
Mangrove Forests ◽  
Wood Pellets ◽  
Excoecaria Agallocha ◽  
Cubic Form ◽  
Mangrove Tree ◽  
Solid Biofuels ◽  
Pre Treatment ◽  
Mangrove Trees

Abstract In order to sustain mangrove forests, only branches part of the mangrove trees have been utilized. In this context, these parts have been used as the raw material of wood pellets and briquettes. These solid biofuels are produced by compressing pulverized woody biomass with or without additives in cubic-form or cylindrical units. In this study, five predominant mangrove trees, namely Avicennia marina, Bruguiera sexangula, Excoecaria agallocha, Rhizopora apiculata, and R. mucronata, have been harvested their branches. Wood with and without bark derived from branches has been investigated for their fundamental properties, namely percentage of bark, ash-content, and physical properties (moisture content, density, and specific gravity). These properties will determine the quality class of the resulted wood pellets and briquettes considering pre-treatment or the nature of the branches’ wood.

scholarly journals THE DISCRETE MODEL FOR THE FORMATION OF COMPANY’S STRATEGY ON THE SOLID BIOFUEL MARKET

2018 ◽  
pp. 185-192
Author(s):  
Nataliia Halysh
Keyword(s):  
Data Analysis ◽  
Market Share ◽  
Discrete Model ◽  
Interval Data ◽  
Production Cycle ◽  
Special Method ◽  
Wood Pellets ◽  
Solid Biofuels ◽  
Solid Biofuel ◽  
Range Of Values

Introduction. In the article, the author pays attention to the research of the actual data of the enterprise, which produces the solid biofuel, with the isolation of raw material supply processes and the formation of the finished products’ cost structure. A system of differential equations is developed and presented. It reveals the influence of these factors and the dynamics of the share of the company's presence on the market of solid biofuels. The method of interval data analysis is substantiated. This method gives adequate results in the calculation of forecast intervals of the indicators and influences the adoption of strategic decisions on the presence of the company in the market of commodity products. An interlinear discrete model of the dynamics of the company's share for 2016 and 2017 is constructed, as a result of which its suitability for implementation in the activity of the enterprise is checked and taken into account while developing the strategy for its development. Purpose. The article aims to construct an interval discrete model of a company's market share at solid biofuels’ market using the system of difference equations and analysis of interval data. Based on the justification of the expediency of the chosen method of research, the other goal is identified. It is to develop the proposals for the implementation of this model in the activities of the enterprise for the production of wood pellets as the basis for providing a management strategy of this enterprise in uncertain external environment. Method. Such standard methods of scientific research as method of systematization, method of processing, method of summation of data, method of definition of general summary synthetic indicators, method of presentation of the results in the form of statistical tables, method of graphs and figures have been used in this research. A special method of data analysis based on interval arithmetic and interval data analysis has been implemented. Results. In the paper, scientific and methodological approaches to developing a strategy for the activities of enterprises producing solid biofuels have been improved. The proposals, which are given to the wood pellets’ enterprises, are based on the use of the developed interval model of market share dynamics of the enterprise at the solid biofuel market. It gives the ability to determine the range of values of the expected dynamics of this market share, depending on the cost of its products and the range of values of the market share by the consumption of raw materials. The results and recommendations, which are described in this article, can be used by enterprises producing solid biofuels (in particular, wood pellets) with a differentiated production cycle, which includes input and output logistics.

scholarly journals Comparative Study of the Properties of Wood Flour and Wood Pellets Manufactured from Secondary Processing Mill Residues

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2487
Author(s):  
Geeta Pokhrel ◽  
Yousoo Han ◽  
Douglas J. Gardner
Keyword(s):  
Moisture Content ◽  
Bulk Density ◽  
Raw Materials ◽  
Wood Flour ◽  
The United States ◽  
Red Maple ◽  
Wood Pellets ◽  
Secondary Processing ◽  
Material Costs ◽  
Mill Residues

The generation of secondary processing mill residues from wood processing facilities is extensive in the United States. Wood flour can be manufactured utilizing these residues and an important application of wood flour is as a filler in the wood–plastic composites (WPCs). Scientific research on wood flour production from mill residues is limited. One of the greatest costs involved in the supply chain of WPCs manufacturing is the transportation cost. Wood flour, constrained by low bulk densities, is commonly transported by truck trailers without attaining allowable weight limits. Because of this, shipping costs often exceed the material costs, consequently increasing raw material costs for WPC manufacturers and the price of finished products. A bulk density study of wood flour (190–220 kg/m3) and wood pellets (700–750 kg/m3) shows that a tractor-trailer can carry more than three times the weight of pellets compared to flour. Thus, this study focuses on exploring the utilization of mill residues from four wood species in Maine to produce raw materials for manufacturing WPCs. Two types of raw materials for the manufacture of WPCs, i.e., wood flour and wood pellets, were produced and a study of their properties was performed. At the species level, red maple 40-mesh wood flour had the highest bulk density and lowest moisture content. Spruce-fir wood flour particles were the finest (dgw of 0.18 mm). For all species, the 18–40 wood flour mesh size possessed the highest aspect ratio. Similarly, on average, wood pellets manufactured from 40-mesh particles had a lower moisture content, higher bulk density, and better durability than the pellets from unsieved wood flour. Red maple pellets had the lowest moisture content (0.12%) and the highest bulk density (738 kg/m3). The results concluded that the processing of residues into wood flour and then into pellets reduced the moisture content by 76.8% and increased the bulk density by 747%. These material property parameters are an important attempt to provide information that can facilitate the more cost-efficient transport of wood residue feedstocks over longer distances.

scholarly journals Changes in the Vietnamese Timber Processing Industry: A Case of Quang Tri Province, North Central Region

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 984
Author(s):  
Seiji Iwanaga ◽  
Dang Thai Hoang ◽  
Hirofumi Kuboyama ◽  
Dang Thai Duong ◽  
Hoang Huy Tuan ◽  
...  
Keyword(s):  
Economies Of Scale ◽  
Raw Materials ◽  
Medium Density Fiberboard ◽  
Tree Planting ◽  
Raw Material ◽  
Wood Pellets ◽  
Planted Forests ◽  
Processing Industry ◽  
Glued Laminated Timber ◽  
On Farm

Vietnam’s forestry policies have expanded the area of planted forests in order to meet the supply of raw materials for the timber processing industry. However, the diversity and volume of demand in the industry have also increased, and a shortage of raw materials can be assumed. For clarifying the correspondence of stakeholders, we explore changes in the resource supply behavior of forestry companies and procurement strategies of companies that manufacture lumber for glued laminated timber, medium density fiberboard (MDF) and wood pellets. Next, we discuss issues and future developments surrounding the supply and demand for timber from planted forests. According to a survey of Quang Tri Province, both industrial and on-farm tree planting play an important role in Vietnam’s wood industry. The origin of the supply has been categorized according to its purpose (products). On the other hand, with the declining supply of imported timber and natural forest timber, inquiries from sawmills and glued laminated timber factories for timber from planted forests have increased, and wood pellet manufacturers are facing competition for raw material procurement with MDF manufacturers, and the supply of timber from planted forests is becoming scarce. The key to the solution lies in improving the low productivity of current on-farm tree planting. To this end, forming farmer groups upon the acquisition of forest certification will help achieve economies of scale and bargaining power.

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