Relationship between proximate analysis parameters and combustion behaviour of high ash Indian coal

Aich, Subhajit; Nandi, Barun Kumar; Bhattacharya, Sumantra

doi:10.1007/s40789-020-00312-5

Cited by 61 publications

(27 citation statements)

References 18 publications

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“…Further based on the TGA/DTG data, ignition index (D i , weight % per minute 3 ) and burnout index (D f , weight % per minute 4 ) are calculated as shown in Eqs. ( 1) and ( 2) (Zhang et al 2015;Aich et al 2020;Behera et al 2019)…”

Section: Methodsmentioning

confidence: 99%

“…Reduced porous structure in sample B further lowers the gas (CO 2 /O 2 ) diffusion rate during combustion and reduces the rate of combustion. In sample A decrease in weight loss started from 350°C due to the release of volatile matter (Aich et al 2020). After 400°C, sharp fall in weight loss signifies the beginning of combustion process.…”

Section: Tga Of Individual Samplesmentioning

confidence: 99%

“…(3) and ( 4), and the results are listed in Table 5. S f for the blends appear in the mid-range (7.35 9 10 -8 - (Behera et al 2020;Aich et al 2019aAich et al , 2020, according to which a coal having the highest S f value and lowest H f value suggests better combustion behaviour since both the indices S f and H f are directly and inversely proportional to maximum combustion rate (DTG max ), respectively (Eqs. (3) and ( 4)).…”

Section: Analysis Of Combustion Indicesmentioning

confidence: 99%

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Combustion characteristics of high ash Indian thermal, heat affected coal and their blends

Aich

Nandi

Bhattacharya

2021

Int J Coal Sci Technol

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Onsite mine fire generates large volumes of heat-affected coal in Jharia coalfields, India. Direct utilization of such heat-affected coal in thermal utilities is not feasible as such coal does not have the desirable volatile matter required for combustion. In the present work, experimental studies have been carried out to investigate the possible utilization of such heat-affected coal in thermal utilities by blending with other coal. Heat-affected coal (31% ash and 5300 kcal/kg GCV) collected from Jharia coalfield were blended with thermal coal (28% ash and 5650 kcal/kg GCV) in different ratios of 90:10, 80:20, 70:30 and 60:40 to identify the desirable blend ratio for burning of blended coal in thermal utilities. Burning characteristics of all the coals were carried out using TGA. Various combustion parameters such as ignition temperature, peak temperature, burnout temperature, ignition index, burnout index, combustion performance index, rate and heat intensity index of the combustion process and activation energy were evaluated to analyse the combustion process. Experimental and theoretical analysis shows the blend ratio of 90:10 can be used in place of only thermal coal in utilities to reduce the fuel cost.

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Section: Methodsmentioning

confidence: 99%

Section: Tga Of Individual Samplesmentioning

confidence: 99%

Section: Analysis Of Combustion Indicesmentioning

confidence: 99%

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Combustion characteristics of high ash Indian thermal, heat affected coal and their blends

Aich

Nandi

Bhattacharya

2021

Int J Coal Sci Technol

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“…Pelet biomassa pada umumnya memiliki kadar abu yang lebih tinggi dari batu bara yang berkisar antara 8,3-11,5% untuk batu bara dari cekungan Illinois, Amerika Serikat [19]. o Nilai Zat Terbang (volatile matter) dari pelet biomassa, dengan kisaran 43-80%, cenderung lebih tinggi daripada batu bara, yang berkisar antara 20-28% [20]. o Sementara, kadar Karbon Tertambat (fixed carbon) dari pelet, dengan kisaran 8-21%, cenderung lebih kecil daripada batu bara, yang memiliki kadar antara 22-40% [20].…”

Section: Produk Finalunclassified

“…o Nilai Zat Terbang (volatile matter) dari pelet biomassa, dengan kisaran 43-80%, cenderung lebih tinggi daripada batu bara, yang berkisar antara 20-28% [20]. o Sementara, kadar Karbon Tertambat (fixed carbon) dari pelet, dengan kisaran 8-21%, cenderung lebih kecil daripada batu bara, yang memiliki kadar antara 22-40% [20].…”

Section: Produk Finalunclassified

Pengolahan Sampah Organik dan Limbah Biomassa dengan Teknologi Olah Sampah di Sumbernya

Brunner

Norhidayat²,

Brunner

2021

JSE

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Solid Waste Processing Technology at the Source (TOSS) is an alternative method in processing organic and biomass waste on a communal scale. The processing of organic and biomass waste material is carried out in three stages of the process: biodrying which utilizes the aerobic activity of microorganisms; chopping which is intended to refine the material, and pelletization to compact the material into biomass pellets. The biodrying process in bamboo boxes is able to reduce the water content in organic and biomass waste within 4-5 days. Sorting of non-organic materials can be done at an early stage before or after the biodrying process. Sorting is required before chopping and pelletizing process to avoid unnecessary machine break down. The biomass pellet which is the final product has a diameter of about 10 mm with a length between 10-40 mm, a calorific value between 3000-4000 kcal/kg, and a moisture content of up to 15%. Compared to coal, biomass pellets tend to have higher volatile and ash content, while lower ash and sulfur content.

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Fuel properties and combustion performance of hydrochars prepared by hydrothermal carbonization of different recycling paper mill wastes

Assis

Chirwa

2022

Can J Chem Eng

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The incineration of high-moisture solid residues generated at the recycling paper mills represents an energetically unfavourable method of resource utilization. Alternatively, hydrothermal pre-treatment is considered. In this study, low-value paper sludges from three different recycling streams were hydrothermally carbonized at 205, 225, and 245 C for 3 h. The raw feedstocks and derived hydrochars were analyzed for energy properties, chemical characteristics, surface morphology, functional groups, and combustion performance employing energy densification and mass yield quantification, scanning electron microscopy, elemental analyzer, Fourier-transform infrared spectroscopy, and thermogravimetry. The increase in reaction temperature was reported to cause a decrease in mass yield and an increase in energy densification and calorific values corresponding to 5.98%-49.35% and 10.10%-58.51% for raw fibre rejects and final sludge-derived hydrochar, respectively. Hydrothermal carbonization (HTC) had a non-significant influence on the energy densification of primary clarifier sludge-derived hydrochar. Higher reaction temperatures favoured the rate of dehydration and decarboxylation, leading to hydrochars with lower H/C and O/C ratios, thereby enhancing the overall fuel properties. The low-nitrogen and low-sulphur fuels obtained validated the effectiveness of HTC treatment to produce high-quality cleaner solid fuel. The burnout temperature was mostly reduced with an increase in HTC temperature. At HTC-205 and 225 C, the ignition temperature and the combustion performance increased as a result of the HTC reaction mechanisms. HTC effectively recovered hydrochar with increased carbon content, improved energy densification, and good combustion adequacy. Hydrochar derived from recycling mills may play a role in the energy sector as a substitute for coal or in co-combustion at coal-fired power plants.

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Relationship between proximate analysis parameters and combustion behaviour of high ash Indian coal

Cited by 61 publications

References 18 publications

Combustion characteristics of high ash Indian thermal, heat affected coal and their blends

Combustion characteristics of high ash Indian thermal, heat affected coal and their blends

Pengolahan Sampah Organik dan Limbah Biomassa dengan Teknologi Olah Sampah di Sumbernya

Fuel properties and combustion performance of hydrochars prepared by hydrothermal carbonization of different recycling paper mill wastes

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