Thermodynamic Analysis of Lignite Gasification in the Downdraft Gasifier

Upadhyay, Darshit S.; Sakhiya, Anil Kumar; Panchal, Krunal R.; Patel, R. N.

doi:10.47469/jees.2018.v05.100058

Cited by 7 publications

(3 citation statements)

References 5 publications

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“…Detailed procedures for calculating mass, energy, and exergy analysis can be found in the authors' previous work [6], [13], [14].…”

Section: Exergy Balancementioning

confidence: 99%

“…[1]. Higher ash and silicates in a feedstock (such as lignite) create clinkers which are responsible for interruption in continuous gasification operation [2], [3]. To overcome such a problem, researchers suggested different options such as co-gasification of feedstock [4], manipulating grate movement and changing air feed position [5], additional suitable catalyst [6], etc.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Syngas Quality in Fixed Bed Gasifier Using CaMg(CO3)2 Catalyst

Upadhyay¹,

Chaudhary²,

Trada³

et al. 2023

Proceedings of the 10th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT 2023)

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This paper deals with the experimental investigation of lignite (L) and wood (W) feedstock in a pilot-scale downdraft gasifier. The study aims to check the compatibility of CaMg(CO3)2 [dolomite (D)] catalyst, 5% (W/W), with lignite and wood (L+D, W+D) feedstock as an additive to enhance the performance of a 10 kWe atmospheric pressure downdraft gasifier system. Fuel consumption and gas flow rate were found to be 10.01-11.6 kg h -1 and 26.76-29.57 kg h -1 , respectively, for lignite and wood feedstock (with and without catalyst). In lignite, CO and H2 concentrations were increased by 6.81 % and 4.9 %, respectively, whereas in wood, their concentrations were increased by 8.88 % and 5.1 % when the catalyst was employed with feedstock. The producer gas LHV and cold gas efficiency were increased by 6.02% and 5.75% in lignite and 6.97% and 6.61 in wood, whereas specific fuel consumption decreased by 5.92% (in L), 5.17 (in W) with dolomite feedstock. Tar and Total Particulate Matter (PM) concentrations in the producer gas were measured and found to have a noticeable decline with catalytic gasification for both feedstocks. The study concludes that adding dolomite offered better results in terms of higher efficiency and lower tar-PM concentrations.

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“…Detailed procedures for calculating mass, energy, and exergy analysis can be found in the authors' previous work [6], [13], [14].…”

Section: Exergy Balancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of Syngas Quality in Fixed Bed Gasifier Using CaMg(CO3)2 Catalyst

Upadhyay¹,

Chaudhary²,

Trada³

et al. 2023

Proceedings of the 10th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT 2023)

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“…Gas Yield: Gas yield is the amount of gas produced from the gasification of per kilogram of biomass feedstock (Upadhyay et al, 2018). It was measured by dividing the total volume of gas by total weight of biomass feedstock.…”

Section: Volume Of Gasmentioning

confidence: 99%

Performance Evaluation of Downdraft Gasifier with Syngas Cleaning System

Ashfaq¹,

Nadeem²,

Yamin³

et al. 2022

SJA

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E verything, in essence, is about energy. Energy has a key role in the stability of a country and is at the forefront of social, environmental and financial security problems (Seyfang and Haxeltine, 2012). Energy streams have a crucial part in the evolving and financial advancement for a country. Being a developing nation, Pakistan is meeting with severe energy crisis, decelerating its economic development. Energy requirements in Pakistan are generally fulfilled by oil, liquefied gasoline, and natural gas resources. In elec-Abstract | Energy is a crucial factor and a capital of a country's resources leading indicator. World's energy focus is shifting towards alternate renewable, cheap and environment-friendly resources that can provide long-term sustainability for survival. Due to the fossil fuels depletion and their ever-growing cost, the need to shift focus towards renewable energy resources has increased a lot. To overcome the above-said problems, there is a need to look for a feasible and robust solution for thermal applications in remote areas. Biomass gasification proved to be one of the most efficient and clean waste-to-energy conversion processes in contrast to direct combustion of agricultural waste. Other than controlled burning of biomass, it can be subjected for different purposes like a thermal, synthesis of ethanol, engine running, and for fuel cell applications. An excessive amount of impurities like char, ash, tar, and particulate matter are making these syngas non-feasible for thermal or engine applications. To overcome the above-stated problem, a downdraft gasifier with cyclone separator and hybrid biomass filter was fabricated using locally available materials in the workshop of the Dept. of Farm Machinery and Power at the University of Agriculture, Faisalabad. Uniform distribution of 2.54-5.08 cm 2 sizes of feedstock was used for gasification. Air was used as a gasifying agent. The reactor capacity was 0.19 m 3 . The values of performance parameters for wood waste and corncobs were recorded as fuel consumption rate (0.002195, 0.002323) kg-s -1 , the volume of gas produced (24.56, 26.33) m 3 , operating time (5480, 5164) s, cleaning unit efficiency (81.79, 79.9) % and gas yield (2.04, 2.19) m 3 -kg -1 .

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