Development and validation of mass reduction model to optimize torrefaction for agricultural byproduct biomass

Oh, Kwang Cheol; Park, Sun Young; Kim, Seok Jun; Choi, Yun Sung; Lee, Chung Geon; Cho, La Hoon; Kim, Dae Hyun

doi:10.1016/j.renene.2019.02.106

Cited by 13 publications

(5 citation statements)

References 45 publications

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“…Yang et al [8] developed a synchronized torrefaction and pelleting process at the laboratory scale and compared their results with previous processes such as torrefaction after pelletizing (TAP) or pelletizing after torrefaction (PAT). Oh et al [9] developed and validated a mass reduction model for agro-byproducts (pepper stem) and determined the optimized torrefaction conditions.…”

Section: Of 14mentioning

confidence: 99%

Characteristic Analysis of Torrefied Pellets: Determining Optimal Torrefaction Conditions for Agri-Byproduct

Park

Kim

et al. 2020

Energies

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This study considers the possibility of utilizing agri-byproducts as energy sources via pelletization and torrefaction. Pellets were placed in a capsule and torrefied in an electrical furnace. Subsequently, they were cooled for 30 min, and their mass loss was measured. To investigate the resulting changes in fuel characteristics, ultimate and proximate analyses were performed, and calorific values were measured. To estimate the water absorption of the pellets, hygroscopicity evaluations were conducted. Based on the experimental results, the energy yield, lower heating value, and exergy were calculated to determine the optimum conditions for torrefaction. The calculation was performed by utilizing the useful exergy and standards applied to biomass power plants. We determined that torrefaction for agro-pellets should be conducted under low-to-intermediate temperatures (210–250 °C) within a period of 50 min. Under these conditions, 7–55% mass reductions were observed, the higher heating value increased from 4110 to 6880 kcal kg−1, and the lower heating value changed from 3780 to 6520 kcal kg−1 owing to reduced hygroscopicity. So, Agro-byproducts can contribute to the practical application by improving the heating value through torrefaction as an alternative to wood pellets.

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Section: Of 14mentioning

confidence: 99%

Characteristic Analysis of Torrefied Pellets: Determining Optimal Torrefaction Conditions for Agri-Byproduct

Park

Kim

et al. 2020

Energies

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“…The calorific value was measured three times using a calorimeter (CAL-3K; DDS calorimeters, Randburg, Gauteng, South Africa) to determine the changes in calorific value based on the process temperature. Energy yield (EY) was calculated using Equation (7) to investigate the change in calorific value and to calculate the parameters related to mass loss.…”

Section: Calorific Value and Energy Yieldmentioning

confidence: 99%

“…Biomass has been proposed as an alternative to solid fossil fuels in this context. Compared to coal, biomass is globally distributed and has the advantage of continuous production through agriculture and forestry [7]. Generally, when plants absorb carbon dioxide from the atmosphere through photosynthesis, approximately 50% of it is released back into the atmosphere through respiration (Figure 2a), while the remaining portion is sequestered in plant biomass through growth creating biofuels biomass known as carbon-neutral fuels [8,9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Optimal Conditions for Oxygen-Rich and Oxygen-Lean Torrefaction of Forestry Byproduct as a Fuel

Park

Kim

et al. 2023

Energies

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Wood biomass is an alternative to fossil fuels. However, biomass use has several limitations. Torrefaction, in which reduction conditions prevail to overcome these limitations, has been suggested. Here, torrefaction using different wood chips (Liriodendron tulipifera, Populus canadensis, Pinus rigida, and Pinus koraiensis) was conducted under oxygen-rich and oxygen-lean conditions to determine the effects of oxygen. Torrefaction was conducted at 230–310 °C for 1 h. A mass yield difference of 3.53–20.02% p (percentage point) was observed between oxygen-lean and oxygen-rich conditions. The calorific value increased by a maximum of 50.95% and 48.48% under oxygen-rich and oxygen-lean conditions, respectively. Decarbonization (DC), dehydrogenation (DH), and deoxygenation (DO) occurred in the following order because of dehydration and devolatilization during biomass torrefaction: DO > DH > DC. The calorific value of the torrefied biomass increased linearly with the extent of all three processes. The combustibility index and volatile ignitability were calculated based on proximate composition to suggest the optimal conditions for replacing anthracite and bituminous coal. This study provides suggestions for stable operation in a standard boiler design.

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“…Also noteworthy is the importance of the agricultural sector in the production of bioenergy from energy crops or waste from the agri-food industry. There are many studies that demonstrate the importance of this source of energy [35][36][37][38].…”

Section: Worldwide Institution Distributionmentioning

confidence: 99%

Renewable Energies in the Agricultural Sector: A Perspective Analysis of the Last Three Years

et al. 2022

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Renewable energy arises as a tool for the supply of energy to the agriculture sector. Currently, there is a growing concern for the environment. This circumstance has led to technological progress in energy use in relation to natural resources and their availability for all productive sectors, including agriculture. The main objective of this work is to perform analysis from a bibliometric point of view and to analyze scientific advances in renewable energy and agriculture worldwide that have occurred in the last three years (2019–2021). The purpose of this study is to provide an overview of the last three years on the topic in order to contribute to the international scientific community, specifically towards collaboration between authors, institutions, and countries. A keyword analysis using community detection was applied to detect the five main clusters of this research and was largely dedicated to the following topics: renewable energy technologies in agriculture, bioenergy, sustainable agriculture, biomass energy, and the environmental impact of agriculture. The main countries found to be conducting research on renewable energy and agriculture include India, China, the United States, Italy, the United Kingdom, Poland, Indonesia, Germany, the Russian Federation, and Spain; the most important institutions conducting research in this area include the Ministry of Agriculture of the People’s Republic of China, the Tashkent Institute of Irrigation and Agricultural Mechanization Engineers at the National Research University in Uzbekistan, the Chinese Academy of Agricultural Sciences, and the Grupo de Investigação em Engenharia e Computação Inteligente para a Inovação e o Desenvolvimento in Portugal. These results may contribute to the identification of new research needs and therefore to the development of future directions of research on renewable energies in the agricultural sector.

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Development and validation of mass reduction model to optimize torrefaction for agricultural byproduct biomass

Cited by 13 publications

References 45 publications

Characteristic Analysis of Torrefied Pellets: Determining Optimal Torrefaction Conditions for Agri-Byproduct

Characteristic Analysis of Torrefied Pellets: Determining Optimal Torrefaction Conditions for Agri-Byproduct

Evaluation of the Optimal Conditions for Oxygen-Rich and Oxygen-Lean Torrefaction of Forestry Byproduct as a Fuel

Renewable Energies in the Agricultural Sector: A Perspective Analysis of the Last Three Years

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