Effect of Carbonization Temperature on Combustion Reactivity of Bagasse Char

Katyal, S.

doi:10.1080/00908310600710715

Cited by 30 publications

(7 citation statements)

References 32 publications

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“…Thus, along with a decrease in T f and fuel ratio, removal of extractives surprisingly increased the reactivity of PE RAW hydrochars. While this matter requires further probing, clearly changes to char composition and morphology, e.g., increased surface area and/or pore size (Figure ), through extraction allowed for a more rapid oxidation. , Removal of the secondary char from the surface of the hydrochars may have increased exposure of active sites to oxygen, the effect of which was more pronounced for the relatively more degraded fibrous structure of PE RAW hydrochars. Varying composition and quantity of catalytic species, such as inorganic matter, where extraction concentrated their presence (c.f.…”

Section: Results and Discussionmentioning

confidence: 99%

Enhanced Hydrothermal Carbonization of Spent Coffee Grounds for the Efficient Production of Solid Fuel with Lower Nitrogen Content

et al. 2021

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As an increasingly abundant lignocellulosic biomass with high moisture content, spent coffee grounds (SCG) are an ideal feedstock for hydrothermal carbonization (HTC). The few examples that have converted SCG into a solid fuel hydrochar have yet to address the char's prohibitively high nitrogen content (∼3 wt %)−a barrier to commercialization due to NOx emission regulations. In this work, an alkaline pretreatment is presented that reduces the N content prior to carbonization under regimes optimized for maximum calorific value (HHV), energy yield, and a conflation of both fuel properties. Characterization of hydrochars and secondary chars, the extractable volatile phase, revealed the highest calorific value for the secondary chars (max HHV = 40.69 MJ/kg) and a minimum N content of 0.1 wt % in hydrochars derived from the alkali pretreated feedstock. Char thermal stability and oxidative reactivity were also determined, with pretreated primary chars exhibiting superior combustion reactivities, ignition, and burnout temperatures. Management of HTC process water is both an environmental and operational challenge due to the presence of phytotoxic organic components and the energy expenditure associated with heating large volumes of water. To this end, the process water was recirculated for up to five cycles resulting in an increase in HHV, energy, and solid yield as well as compositional change of the char products.

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Section: Results and Discussionmentioning

confidence: 99%

Enhanced Hydrothermal Carbonization of Spent Coffee Grounds for the Efficient Production of Solid Fuel with Lower Nitrogen Content

et al. 2021

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“…Pyrolysis processes are classified under three main categories; slow pyrolysis, rapid (or flash) pyrolysis at high temperatures, and flash pyrolysis at low temperatures [ 61 ]. The most commonly used pyrolysis process among them in present times is flash pyrolysis.…”

Section: Description Of the Existing Waste-to-energy Technologiesmentioning

confidence: 99%

“…The most commonly used pyrolysis process among them in present times is flash pyrolysis. This is because the slow pyrolysis process requires a very long period of time (many hours) and yields bio-char as the primary product, while flash pyrolysis produces about 60% bio-oil in only a few seconds [ 61 , 62 ]. Most pyrolysis technologies are environmentally friendly ways of converting feedstock; however, if the right measures are not taken, they can cause adverse environmental and health issues.…”

Section: Description Of the Existing Waste-to-energy Technologiesmentioning

confidence: 99%

Integrated AHP-TOPSIS under a Fuzzy Environment for the Selection of Waste-To-Energy Technologies in Ghana: A Performance Analysis and Socio-Enviro-Economic Feasibility Study

Afrane

Ampah

Agyekum

et al. 2022

IJERPH

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Energy recovery from waste presents a promising alternative for several countries, including Ghana, which has struggled with unsustainable waste treatment methods and an inadequate power supply for several decades. The current study adopts a comprehensive multi-criteria decision-making approach for the selection of an optimal waste-to-energy (WtE) technology for implementation in Ghana. Four WtE technologies are evaluated against twelve selection criteria. An integrated AHP-fuzzy TOPSIS method is applied to estimate the criteria’s weights and rank the WtE alternatives. From the AHP results, technical criteria obtained the highest priority weight, while social criteria emerged as the least important in the selection process. The overall ranking order of WtE technologies obtained by fuzzy TOPSIS is as follows: anaerobic digestion > gasification > pyrolysis > plasma gasification. The sensitivity analysis indicates highly consistent and sturdy results regarding the optimal selection. This study recommends adopting a hybrid system of anaerobic digestion and gasification technologies, as this offers a well-balanced system under all of the evaluation criteria compared to the standalone systems. The results of the current study may help the government of Ghana and other prospective investors select a suitable WtE technology, and could serve as an index system for future WtE research in Ghana.

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“…The energy produced through thermochemical processes can be used in automotive engines for power production. In the thermochemical conversion process of biomass combustion technologies, pyrolysis technologies and gasification technologies are employed [41]. The main advantages of thermochemical conversion processes are fewer emissions of greenhouse gases, the processing time is short, various feedstocks can be used and small footprints [42].…”

Section: Thermochemical Conversionmentioning

confidence: 99%

Perspective of Bioenergy in Pakistan for Sustainable Eco-Friendly Energy Substitute: A Review

Maitlo

Abbasi

Korai

et al. 2021

Mehran Univ. res. j. eng. technol.

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Pakistan has remained an energy deficient country for the last few decades. The supply of electricity decreased in 2002-2007 against the exponentially increasing demand in Pakistan. In the meantime, severe load shedding was started across Pakistan that negatively affected the economic growth of the country. More than 63% of the population in rural areas live without electricity. The government cut down electricity supply eight to twelve hours per day in terms of load shedding that adversely affects the living standards and economic growth of the nation. In the world, Pakistan stands on 133 regarding ranking in energy consumption. Energy usage per capita in Pakistan is 482 kilograms of oil equivalent per year (kgoe/a) which is very low when compared with the industrialized countries. Besides that Pakistan strongly adheres with non-renewable energy options to mollify its energy demand. The import of fossil fuels to meet energy demand adversely affects the economy of Pakistan. This review helps in the identification of indigenous available biomass resources and their conversion processes for power production to improve power generation, living standards and economy of the country. The application of indigenous biomass resources for electricity generation will reduce the pressure caused by increased demand for energy.

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Effect of Carbonization Temperature on Combustion Reactivity of Bagasse Char

Cited by 30 publications

References 32 publications

Enhanced Hydrothermal Carbonization of Spent Coffee Grounds for the Efficient Production of Solid Fuel with Lower Nitrogen Content

Enhanced Hydrothermal Carbonization of Spent Coffee Grounds for the Efficient Production of Solid Fuel with Lower Nitrogen Content

Integrated AHP-TOPSIS under a Fuzzy Environment for the Selection of Waste-To-Energy Technologies in Ghana: A Performance Analysis and Socio-Enviro-Economic Feasibility Study

Perspective of Bioenergy in Pakistan for Sustainable Eco-Friendly Energy Substitute: A Review

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