Homogeneous and heterogeneous contributions of CO 2 and recycled NO to NO emission difference between air and oxy-coal combustion

Hu, Xiaowei; Li, Xian; Luo, Guangqian; Yao, Hong

doi:10.1016/j.fuel.2015.09.030

Cited by 23 publications

(8 citation statements)

References 23 publications

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“…It is believed that the radiative intensity is related to the radiative temperature, which is the temperature on the flame surface. In this study, it is believe that the temperature controlled by the tube furnace is the combustion temperature of fuel, 8,12 which is slightly different from the actual flame surface temperature. Nevertheless, there is a positive correlation between them; thus, the combustion temperature is used as a variable to study the characteristics of radiative energy.…”

Section: Items Exergy Loss Ratementioning

confidence: 94%

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A novel flame energy grading conversion system: Preliminary experiment and thermodynamic parametric analysis

et al. 2019

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Summary The focus of this study is to improve the efficiency of the thermal power cycle from the perspective of photo energy and thermal energy grading conversion. A new concept of combined radiation and heat engine model was proposed to establish a novel flame energy grading conversion system based on photovoltaic conversion and the Rankine cycle. From the perspective of energy utilization, the spectral radiative energy characteristics in oxy‐coal combustion were experimentally investigated, and a preliminary thermodynamic model of the new system was established based on the experimental results. Finally, energy and exergy analyses were conducted to determine the general characteristics of the proposed system and assess the improvements to the Rankine cycle. The results indicated that temperature was the main factor affecting the short‐waveband energy ratio. Compared with the Rankine cycle, the new flame energy grading conversion system improved the system efficiency by about 3.5%. The exergy analysis indicated that the proposed system reduced the exergy loss factor in the heat transfer of the boiler by about 3% to 6%. This study provides references for improving the thermal power cycle efficiency.

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Section: Items Exergy Loss Ratementioning

confidence: 94%

“…6,7 This improves the utilization of radiative energy. Many studies have been conducted on the pollutant characteristics of oxy-coal combustion 8,9 and reaction kinetics. 10,11 However, there are few studies on radiative energy in combustion from the perspective of energy utilization.…”

Section: Introductionmentioning

confidence: 99%

A novel flame energy grading conversion system: Preliminary experiment and thermodynamic parametric analysis

et al. 2019

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“…The heating value may be associated with the elemental composition of solid fuels [8]. In TR and HT, the energy content of biochar increased, which was linked to a decrease in the number of low energy H/C and O/C bonds (decreasing H/C and O/C ratios) and an increase in the number of high energy C-C bonds [9]. In the range of 200-300 °C, the carbon content of biochar increased and oxygen content decreased with increasing temperature (Figure 3).…”

Section: The Chemical Properties Of Biocharmentioning

confidence: 99%

“…: 69.55% and 16.82% for TR, 70.93% and 15.79% for HT, respectively. Dehydration, condensation, hydrolysis, demethanation, and decarboxylation are all processes involved in lignocellulosic HT [9]. As a result, HT contains a variety of compounds dissolved in the liquid residue, in addition to solid and gaseous materials.…”

Section: The Chemical Properties Of Biocharmentioning

confidence: 99%

Upgrading of Palm Oil Empty Fruit Bunches to Solid Fuel Using Torrefaction and Hydrothermal Treatment

Rahim¹,

Ma²,

Pohan³

et al. 2021

Proceedings of the International Conference on Sustainable Biomass (ICSB 2019)

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To enhance the physicochemical properties of the EFB in the form of biochar, torrefaction and hydrothermal treatment were used. The proximate and ultimate compositions, heating values, and mineral composition of the biochar were all determined. The results showed that after treatment, fixed carbon increased while volatile matter decreased. With increasing reaction temperature, the increase and decrease were more noticeable. After hydrothermal treatment at 300 oC, the heating values of EFB increased from 19.05 MJ/kg to 29.31 MJ/kg. As the reaction temperature rose, so did the energy densification. The contents of Na, K, and Si in EFB decreased after hydrothermal treatment, according to XRF results. In general, the ash content of biochar obtained through hydrothermal treatment was lower than that of EFB (4.54%) as a raw material and comparable to Indonesian coal (37.37%) as a comparison. As a result, hydrothermal treatment is preferable to torrefaction when it comes to converting biomass to high-quality solid fuel.

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“…Properties of the SMSW and typical coals[25,26] SMSW simulated municipal solid waste, M moisture, A ash, VM volatile matter, FC fixed carbon…”

mentioning

confidence: 99%

Biochar and pyrolytic gas properties from pyrolysis of simulated municipal solid waste (SMSW) under pyrolytic gas atmosphere

Yan

Zhang

Wibowo

et al. 2020

Waste Dispos. Sustain. Energy

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Municipal Solid Waste (MSW) was converted into high-grade solid fuels (biochar) and gaseous product via thermal pyrolysis under pyrolytic gas atmosphere. The experiment was carried out in a packed-bed reactor at the temperature range of 600-800 °C in both atmospheres of N 2 and pyrolytic gas. Gas, liquid, and solid products were analyzed by gas chromatograph and elemental analysis. Amount of biochar obtained from both atmospheres were not significantly different. CH 4 and CO 2 in pyrolytic gas promoted the release of volatile in the MSW, resulting in lower ratio of VM/FC, ca. 0.13. The atomic ratios of O/C and H/C were around 0.02-0.11 and 0.005-0.035, respectively. These values were equivalent to anthracite coal type. On the other hand, the liquid fuel yield under pyrolytic gas condition was found to be higher, compared with that under N 2 condition. In addition, the enhancement of H 2 and CO production was accompanied by the decrease in CH 4 and CO 2 output. Overall, the operating condition at 800 °C or higher with reaction times longer than 4 min were recommended for production of biochar with fuel qualities approaching anthracite coal. Graphic abstractKeywords Municipal solid waste · Pyrolysis · Pyrolytic gas atmosphere · Biochar * Haryo Wibowo

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Homogeneous and heterogeneous contributions of CO 2 and recycled NO to NO emission difference between air and oxy-coal combustion

Cited by 23 publications

References 23 publications

A novel flame energy grading conversion system: Preliminary experiment and thermodynamic parametric analysis

A novel flame energy grading conversion system: Preliminary experiment and thermodynamic parametric analysis

Upgrading of Palm Oil Empty Fruit Bunches to Solid Fuel Using Torrefaction and Hydrothermal Treatment

Biochar and pyrolytic gas properties from pyrolysis of simulated municipal solid waste (SMSW) under pyrolytic gas atmosphere

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