Removal of SO<sub>2</sub> from Flue Gas by Sodium Humate Solution

Sun, Zhiguo; Zhao, Yuzeng; Gao, Hanyang; Hu, Guoxin

doi:10.1021/ef901052r

Cited by 53 publications

(48 citation statements)

References 17 publications

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“…Total SO 2 absorption can be calculated by (8)

\begin{matrix} Q = {false\int}_{normal0}^{T} \frac{(η \times q \times C_{0} \times M)}{22.4 \times 3600 \times 1 0^{3}} d t, \\ Q = \frac{q \times C_{0} \times M}{8.064 \times 1 0^{7}} {false\int}_{normal0}^{T} η d t, \end{matrix}

where Q stands for the amount of SO 2 absorption, mmol and η stands for the removal efficiency of SO 2 , %. The formula of the SO 2 absorption efficiency can be obtained from the literature [17]. q stands for the gas flow, m 3 /h; C 0 stands for the inlet concentration of SO 2 , ppm; M stands for the molar mass SO 2 , g/mol; T stands for the reaction time, s.…”

Section: Resultsmentioning

confidence: 99%

Removal of Sulfur Dioxide from Flue Gas Using the Sludge Sodium Humate

Zhao

2013

The Scientific World Journal

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This study shows the ability of sodium humate from alkaline treatment sludge on removing sulfur dioxide (SO2) in the simulated flue gas. Experiments were conducted to examine the effect of various operating parameters, like the inlet SO2 concentration or temperature or O2, on the SO2 absorption efficiency and desulfurization time in a lab-scale bubbling reactor. The sludge sodium humate in the supernatant after alkaline sludge treatment shows great performance in SO2 absorption, and such efficiency can be maintained above 98% with 100 mL of this absorption solution at 298 K (flue gas rate of 0.12 m3/h). The highest SO2 absorption by 1.63 g SHA-Na is 0.946 mmol in the process, which is translated to 0.037 g SO2 g−1 SHA-Na. The experimental results indicate that the inlet SO2 concentration slightly influences the SO2 absorption efficiency and significantly influences the desulfurization time. The pH of the absorption solution should be above 3.5 in this process in order to make an effective desulfurization. The products of this process were characterized by Fourier transform infrared spectroscopy and X-ray diffraction. It can be seen that the desulfurization products mainly contain sludge humic acid sediment, which can be used as fertilizer components.

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“…Total SO 2 absorption can be calculated by (8)

\begin{matrix} Q = {false\int}_{normal0}^{T} \frac{(η \times q \times C_{0} \times M)}{22.4 \times 3600 \times 1 0^{3}} d t, \\ Q = \frac{q \times C_{0} \times M}{8.064 \times 1 0^{7}} {false\int}_{normal0}^{T} η d t, \end{matrix}

Section: Resultsmentioning

confidence: 99%

Removal of Sulfur Dioxide from Flue Gas Using the Sludge Sodium Humate

Zhao

2013

The Scientific World Journal

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“…Thus, cost-effective technologies for removing SO 2 is one of the most important issues. 23 Among this research, removal of air pollutants by wet processes with HA is a good prospect. In addition to coal HA−Na, sluge HA−Na (SHA− Na), biochemical fulvic acid (BFA) can be used as a desulfurization agent.…”

Section: Application Of Ha In Waste Gas Treatmentmentioning

confidence: 99%

“…Sun et al 23 carried out research on SO 2 absorption using HA−Na as the raw material. They analyzed the mechanism and kinetics of SO 2 absorption with HA−Na solution in a bubbling reactor.…”

Section: Application Of Ha In Waste Gas Treatmentmentioning

confidence: 99%

Treatment of Waste Gases by Humic Acid

Sun

Xie

2015

Energy Fuels

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Humic acid (HA) is a natural adsorbent and has special physical and chemical characteristics that form the foundation for disposal of pollutants from a combustor flue gas. HA, which occurs widely in soil, water, and low-rank coals, has already been proposed as a candidate that can be used as a sorbent for air pollution control. A flue gas desulfurization and denitrification (FGDD) process employing HA seems like a promising approach. It is a better choice using HA−Na as a desulfurization additive to improve wet limestone scrubbers or other FGDD processes. This paper reviews the recent development of waste gas treatment by HA with special reference to HA for removal of SO 2 , NO x , CO 2 , H 2 S, and heavy metals.

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“…The removal of combustion gases has been the subject of many studies in recent years because these pollutants cause environmental problems (Sun et al, 2010). SO 2 emissions from industrial processes are the main cause of acid rain, which is destructive to the ecological environment and causes issues such as aquatic ecosystem damage, soil acidification, and materials corrosion, among others.…”

Section: Introductionmentioning

confidence: 99%

Reaction behavior of SO₂ in the sintering process with flue gas recirculation

Fan

Gan

et al. 2016

Journal of the Air & Waste Management Association

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The primary goal of this paper is to reveal the reaction behavior of SO 2 in the sinter zone, combustion zone, drying-preheating zone, and over-wet zone during flue gas recirculation (FGR) technique. The results showed that SO 2 retention in the sinter zone was associated with free-CaO in the form of CaSO 3 /CaSO 4 , and the SO 2 adsorption reached a maximum under 900ºC. SO 2 in the flue gas came almost from the combustion zone. One reaction behavior was the oxidation of sulfur in the sintering mix when the temperature was between 800 and 1000ºC; the other behavior was the decomposition of sulfite/sulfate when the temperature was over 1000ºC. However, the SO 2 adsorption in the sintering bed mainly occurred in the drying-preheating zone, adsorbed by CaCO 3 , Ca(OH) 2 , and CaO. When the SO 2 adsorption reaction in the drying-preheating zone reached equilibrium, the excess SO 2 gas continued to migrate to the over-wet zone and was then absorbed by Ca(OH) 2 and H 2 O. The emission rising point of SO 2 moved forward in combustion zone, and the concentration of SO 2 emissions significantly increased in the case of flue gas recirculation (FGR) technique.Implications: Aiming for the reuse of the sensible heat and a reduction in exhaust gas emission, the FGR technique is proposed in the iron ore sintering process. When using the FGR technique, SO 2 emission in exhaust gas gets changed. In practice, the application of the FGR technique in a sinter plant should be cooperative with the flue gas desulfurization (FGD) technique. Thus, it is necessary to study the influence of the FGR technique on SO 2 emissions because it will directly influence the demand and design of the FGD system. PAPER HISTORY

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Removal of SO₂ from Flue Gas by Sodium Humate Solution

Cited by 53 publications

References 17 publications

Removal of Sulfur Dioxide from Flue Gas Using the Sludge Sodium Humate

Removal of Sulfur Dioxide from Flue Gas Using the Sludge Sodium Humate

Treatment of Waste Gases by Humic Acid

Reaction behavior of SO₂ in the sintering process with flue gas recirculation

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Removal of SO2 from Flue Gas by Sodium Humate Solution

Cited by 53 publications

References 17 publications

Removal of Sulfur Dioxide from Flue Gas Using the Sludge Sodium Humate

Removal of Sulfur Dioxide from Flue Gas Using the Sludge Sodium Humate

Treatment of Waste Gases by Humic Acid

Reaction behavior of SO2 in the sintering process with flue gas recirculation

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Product

Resources

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Removal of SO₂ from Flue Gas by Sodium Humate Solution

Reaction behavior of SO₂ in the sintering process with flue gas recirculation