Effects on NOx and SO2 Emissions during Co-Firing of Coal With Woody Biomass in Air Staging and Reburning

Hodzic, Nihad; Metović, Sadjit; Kazagic, Anes

doi:10.14710/ijred.7.1.1-6

Cited by 10 publications

(4 citation statements)

References 2 publications

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“…Therefore, reducing the dependence on traditional energy sources for sustainable economic development while ensuring the environmental protection task is becoming an urgent requirement for all countries [5]. The auto industry is facing two major challenges: the shortage of petroleum fuel sources [6][7][8] and the pressure of strict regulations on emissions and fuel consumption. Finding new solutions is an inevitable trend to reduce the above pressures [9].…”

Section: Introductionmentioning

confidence: 99%

[RETRACTED] Investigation for Evaluating the Energy Recovery Capacity of the Mechanical Brake System on Urban Buses: A Case in Vietnam

Trinh

Nguyen

Dong

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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Currently, traditional fossil energy is gradually exhausted for sustainable economic development, and environmental protection is an urgent requirement for all countries. Therefore, the issue of saving energy, as well as exploiting renewable energy sources, is being prioritized for development. The braking system collects dynamic energy, also known as the regenerative braking system, which is understood as the brake system; instead of converting kinetic energy into heat, the brake system can collect and store energy. The brake system of the bus in use is usually frictional. During braking, this type of brake system converts the vehicle's kinetic energy into heat, dissipates it into the surrounding environment, and cannot be recovered. Moreover, due to the operational characteristics, the bus has high stopping frequency and high braking capacity, leading to wasted energy, in addition to producing many emissions causing environmental pollution. This study focuses on experimental research for evaluating the dynamic energy acquisition of the mechanical brake system on a school bus as a function of operating parameters such as vehicle speed according to gears, vehicle mass as well as hydraulic pressure parameters. The results are noticed that the highest dynamic energy recovery rate is about 35% in the lowest gear. In the case, from the initial braking velocity of 30km/h to 0 km/h, the initial working pressure of the hydraulic tank is 100bar, the dynamic energy recovery rate is about 25%.

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Section: Introductionmentioning

confidence: 99%

[RETRACTED] Investigation for Evaluating the Energy Recovery Capacity of the Mechanical Brake System on Urban Buses: A Case in Vietnam

Trinh

Nguyen

Dong

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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“…Co-firing of biomass using rice straw and wood reduces SO2 emissions due to the sulfur content of rice straw and wood is lower than coal (Chang et al, 2019). The SO2 emission insignificantly decreases as the proportion of woody biomass in the mixture increases and does not depend on how the combustion air was supplied (Hodžić et al, 2018).…”

Section: Environmental Impactmentioning

confidence: 98%

Techno-Economic Analysis of Co-firing for Pulverized Coal Boilers Power Plant in Indonesia

Arifin¹,

Insani²,

Idris

et al. 2023

Int. J. Renew. Energy Dev.

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The utilization of co-firing (coal-biomass) in existing coal-fired power plants (CFPPs) is the fastest and most effective way to increase the renewable energy mix, which has been dominated by pulverized coal (PC) boilers, particularly in the Indonesian context. This study aims to investigate the technical and economic aspects of co-firing by conducting a pilot project of three PC boiler plants and capturing several preliminary figures before being implemented for the entire plants in Indonesia. Various measured variables, such as plant efficiency, furnace exit gas temperature (FEGT), fuel characteristic, generating cost (GC), and flue gas emissions, were identified and compared between coal-firing and 5%-biomass co-firing. The result from three different capacities of CFPP shows that co-firing impacts the efficiency of the plant corresponding to biomass heating value linearly and has an insignificant impact on FEGT. Regarding environmental impact, co-firing has a high potential to reduce SO2 and NOx emissions depending on the sulfur and nitrogen content of biomass. SO2 emission decreases by a maximum of 34% and a minimum of 1.88%. While according to economic evaluation, the average electricity GC increases by about 0.25 USD cent/kWh due to biomass price per unit of energy is higher than coal by 0.64×10-3 USD cent/kcal. The accumulation in the one-year operation of 5%-biomass co-firing with a 70% capacity factor produced 285,676 MWh of green energy, equal to 323,749 tCO2e and 143,474 USD of carbon credit. The biomass prices sensitivity analysis found that the fuel price per unit of energy between biomass and coal was the significant parameter to the GC changes.

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“…Co-firing biomass has a vital role in achieving these new energy objectives, as it can reduce the potential environmental consequences of fossil fuels combustions [3][4][5][6]. In co-firing, greenhouse gasses, such as CO 2 , NO x , and SO x can be reduced when replacing a portion of coal with biomass [7][8][9][10][11]. Biomass is intended as a CO 2 -zero net atmospheric emission because, during its rise, it uses the same fraction of CO 2 from the air as that released during its combustion.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Design of Biomass Co-Firing in a Full-Scale Coal-Fired Furnace with Storage Pulverizing System

Wang

Rahman

et al. 2021

Agronomy

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Co-firing coal and biomass in existing power plants facilitates influential advancement in the use of renewable energy resources and carbon emissions reduction. Biomass is intended as a CO2-zero net emission because, during its rise, it uses the same fraction of CO2 from the air as that released during its combustion. In addition, the content of nitrogen and sulfur in biomass is lower than in coal. Therefore, the emissions of NOx and SOx can be minimized by co-firing it with coal. In general, the effect of biomass direct co-firing on safety, pulverizing system performance, furnace efficiency, and NOx emission in full-scale furnaces is rarely studied. In this study, biomass direct co-firing was carried out in a 55 MW tangentially fired pulverized coal furnace. The effects of biomass co-firing on safety, the performance of the pulverizing system, furnace efficiency, and pollutant emissions (unburned carbon and NOx) are studied. The results show that the blending of biomass fuel with less than 20% of coal has no issue with respect to auto-ignition and safety. The performance of the pulverizing system is affected up to a certain limit due to the difficulty of grinding the biomass particles into required fineness. The biomass co-firing up to 20% is feasible, but greater than this percentage will severely affect the furnace efficiency. The co-firing of biomass enhanced the NOx reduction significantly and further improved the performance of the SNCR process. This study could provide guidance for the application of biomass co-firing in industrial furnaces.

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Effects on NOx and SO2 Emissions during Co-Firing of Coal With Woody Biomass in Air Staging and Reburning

Cited by 10 publications

References 2 publications

[RETRACTED] Investigation for Evaluating the Energy Recovery Capacity of the Mechanical Brake System on Urban Buses: A Case in Vietnam

[RETRACTED] Investigation for Evaluating the Energy Recovery Capacity of the Mechanical Brake System on Urban Buses: A Case in Vietnam

Techno-Economic Analysis of Co-firing for Pulverized Coal Boilers Power Plant in Indonesia

Experimental Study and Design of Biomass Co-Firing in a Full-Scale Coal-Fired Furnace with Storage Pulverizing System

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