An Experimental Study on Field Application of On-site Activated Carbon Regeneration using the Low Temperature Vacuum Swing Adsorption Process

Abstract An exceptional phenomenon has been observed that nitrogen monoxide can be effectively adsorbed over activated carbon at cold temperatures with the presence of oxygen. Based on this finding, a novel low temperature adsorption process is developed to simultaneously remove SO2 and NOx from flue gas with a target of near-zero emission. In this study, the adsorption characteristics of NO and SO2 over activated carbon at various temperatures (-20, 0, 20 and 80℃) are experimentally investigated. For NO-O2 co-adsorption, NO-NO2 equilibriums with increasing NO2 concentration along the the adsorption bed are established due to the catalytic oxidation of NO over activated carbon. Co-adsorption of NO-NO2 occurs at each cross section of the adsorption bed and the adsorption capability increases along the adsorption bed with increasing NO2 concentrations. The oxidation rate of NO can be significantly enhanced at cold temperatures, which leads to an extraordinary improvement of NO adsorption. At a space velocity of 5000h-1 and an initial NO concentration of 200 ppmv, the breakthrough time increases from 3.49 to 1591.75 minutes when the temperature decreases from 80 to -20℃. In addition, the adsorption capacity of SO2 is also dramatically increased at cold temperatures. At a space velocity of 5000h-1 and an initial SO2 concentration of 1000 ppmv, the breakthrough time increase from 20 to 265 minutes when the temperature decreases from 80 to -20℃. A pilot-scale testing platform with a flue gas flowrate of 3600 Nm3/h is developed to validate this novel adsorption process for simultaneous desulfurization and denitrification. Emission of both SO2 and NOx is less than 1mg/Nm3, and the predicted energy penalty is about 3% of the net generation.

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Experimental study on pulse self–heating of lithium–ion battery at low temperature

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2019.02.020 ◽

2019 ◽

Vol 135 ◽

pp. 696-705 ◽

Cited By ~ 13

Author(s):

Z.G. Qu ◽

Z.Y. Jiang ◽

Q. Wang

Keyword(s):

Experimental Study ◽

Low Temperature ◽

Lithium Ion Battery ◽

Lithium Ion ◽

Self Heating

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Factors Affecting the Dependency of Shear Strain of LRB and SHDR: Experimental Study

Actuators ◽

10.3390/act10050098 ◽

2021 ◽

Vol 10 (5) ◽

pp. 98

Author(s):

Chao-Yong Shen ◽

Xiang-Yun Huang ◽

Yang-Yang Chen ◽

Yu-Hong Ma

Keyword(s):

Experimental Study ◽

Low Temperature ◽

Shear Strain ◽

Loading Frequency ◽

Loading Test ◽

Characteristic Strength ◽

Rubber Bearing ◽

Dominant Feature ◽

Loading Sequence ◽

G Value

In this research we conducted a sensitivity experimental study where we explored the dependency of the shear strain on the seismic properties of bearings, namely lead rubber bearing (LRB) and super high damping rubber bearing (SHDR). The factors studied were vertical pressure, temperature, shear modulus of the inner rubber (G value), loading frequency, and loading sequence. Six specimens were adopted, i.e., three LRBs and three SHDR bearings. A series of test plans were designed. The seismic characteristics of the bearings were captured through a cyclic loading test, which included post-yield stiffness, characteristic strength, area of a single cycle of the hysteretic loop, equivalent stiffness, and equivalent damping ratio. A whole analysis of variances was then conducted. At the same time, to explore certain phenomena caused by the factors, an extended discussion was carried out. Test results showed that the temperature is the most dominant feature, whereas the G value is the least contributing factor, with the effect of the loading frequency and the loading sequence found between these two. The increment of the post-yielded stiffness for LRB from 100% to 25% is a significant reduction from a low temperature to high one. The slope of the characteristic strength versus the shear strain for LRB under high temperature is larger than the one under low temperature.

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Correction to “Experimental Study of the Effect of Different Parameters on the Adsorption and Desorption of Trichloroethylene Vapor on Activated Carbon Particles”

ACS Omega ◽

10.1021/acsomega.0c06102 ◽

2021 ◽

Vol 6 (3) ◽

pp. 2429-2433

Author(s):

Shradha Nikam ◽

Debapriya Mandal

Keyword(s):

Experimental Study ◽

Activated Carbon ◽

Adsorption And Desorption ◽

Carbon Particles ◽

Activated Carbon Particles

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Study on Adsorption Properties of Modified Corn Cob Activated Carbon for Mercury Ion

Energies ◽

10.3390/en14154483 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4483

Author(s):

Yuyingnan Liu ◽

Xinrui Xu ◽

Bin Qu ◽

Xiaofeng Liu ◽

Weiming Yi ◽

...

Keyword(s):

Activated Carbon ◽

Photoelectron Spectroscopy ◽

Adsorption Process ◽

Physical Adsorption ◽

Raw Material ◽

Order Kinetic ◽

Mercury Ions ◽

Corn Cob ◽

Adsorption Time ◽

X Ray

In this study, corn cob was used as raw material and modified methods employing KOH and KMnO4 were used to prepare activated carbon with high adsorption capacity for mercury ions. Experiments on the effects of different influencing factors on the adsorption of mercury ions were undertaken. The results showed that when modified with KOH, the optimal adsorption time was 120 min, the optimum pH was 4; when modified with KMnO4, the optimal adsorption time was 60 min, the optimal pH was 3, and the optimal amount of adsorbent and the initial concentration were both 0.40 g/L and 100 mg/L under both modified conditions. The adsorption process conforms to the pseudo-second-order kinetic model and Langmuir model. Scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and Zeta potential characterization results showed that the adsorption process is mainly physical adsorption, surface complexation and ion exchange.

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Supercritical CO2 regeneration of activated carbon loaded with organic adsorbates

Water Science & Technology ◽

10.2166/wst.1997.0285 ◽

1997 ◽

Vol 35 (7) ◽

pp. 261-268 ◽

Cited By ~ 11

Author(s):

Kazuyuki Chihara ◽

Kanji Oomori ◽

Takao Oono ◽

Yosuke Mochizuki

Keyword(s):

Activated Carbon ◽

Cost Estimation ◽

Supercritical Co2 ◽

Adsorption Equilibrium ◽

Equilibrium Constants ◽

Adsorption Dynamics ◽

Boiling Points ◽

Organic Adsorbates ◽

Carbon Regeneration ◽

Co2 Density

Supercritical CO2 regeneration is one of the possibilities for spent carbon regeneration loaded with some organics. Here, adsorption equilibrium and adsorption dynamics were evaluated for some typical organic pollutants under some supercritical CO2 conditions. A supercritical CO2 chromatograph packed with activated carbon (F-400, CAL) was used to detect the pulse responses of organics, which were analyzed by moment analysis. Adsorption equilibrium constants of some organics varied with CO2 density and their boiling points. Possibility of regeneration of each substance was discussed. Cost estimation was necessary and was the key point of this technique.

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