Selective absorption of H2S from gas mixtures into aqueous solutions of blended amines of methyldiethanolamine and 2-tertiarybutylamino-2-ethoxyethanol in a packed column

Lu, Jian-Gang; Yong, Zheng; He, Dingyong

doi:10.1016/j.seppur.2006.04.003

Cited by 122 publications

(63 citation statements)

References 21 publications

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“…The best H 2 S removal efficiency by pH of 11-13 was reported by Jian G. Lua et al 30) and Brettschneider et al 31) .…”

Section: Discussionmentioning

confidence: 85%

“…Generally, the venturi has a low to moderate removal efficiency for H 2 S that mainly relates to its low solubility. The effectiveness of the packed scrubber for removal of H 2 S has been proven by several studies [28][29][30][31][32] . The alkali mixtures of NaOH and NaOcl as absorption liquid has good efficiency for H 2 S removal in a packed scrubber 4) .…”

Section: Discussionmentioning

confidence: 99%

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Application of Local Exhaust Ventilation System and Integrated Collectors for Control of Air Pollutants in Mining Company

Shahna

Farasati

2012

Ind Health

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Abstact: Local exhaust ventilation (LEV) systems and integrated collectors were designed and implemented in a mining company in order to control emitted air pollutant from furnaces. The LEV was designed for capture and transition of air pollutants emitted from furnaces to the integrated collectors. The integrated collectors including four high efficiency Stairmand model cyclones for control of particulate matter, a venturi scrubber for control of the fine particles, SO 2 and a part of h 2 S to follow them, and a packed scrubber for treatment of the residual h 2 S and So 2 were designed. Pollutants concentration were measured to determine system effectiveness. The results showed that the effectiveness of LEV for reducing workplace pollution is 91.83%, 96.32% and 83.67% for dust, So 2 and h 2 S, respectively. Average removal efficiency of particles by combination of cyclone and venturi scrubber was 98.72%. Average removal efficiency of SO 2 and h 2 S were 95.85% and 47.13% for the venturi scrubber and 68.45% and 92.7% for the packed bed scrubber. The average removal efficiency of SO 2 and h 2 S were increased to 99.1% and 95.95% by the combination of venturi and packed bed scrubbers. According to the results, integrated collectors are a good air pollution control option for industries with economic constraints and ancient technologies.

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“…The best H 2 S removal efficiency by pH of 11-13 was reported by Jian G. Lua et al 30) and Brettschneider et al 31) .…”

Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Application of Local Exhaust Ventilation System and Integrated Collectors for Control of Air Pollutants in Mining Company

Shahna

Farasati

2012

Ind Health

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“…Currently, these unwanted gases are removed by absorption into physical or chemical solvents, absorption onto activated carbon, cryogenic distillation, or separation with solid and liquid membranes [2,3]. Gas-liquid absorption methods that use aqueous solutions of alkanolamines are extensively used to remove CO 2 and H 2 S from gaseous streams in the natural-gas, oil-refining, petroleum and synthetic-ammonia industries [4]. Primary, secondary, and tertiary amines such as monoethanolamine (MEA), diethanolamine (DEA), and N-methyldiethanolamine (MDEA), respectively, are the alkanolamine solvents used.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Removal of H2S using MDEA Solution in Microchannel

Ji¹,

Zhang²,

Wei³

et al. 2016

Proceedings of the 2016 5th International Conference on Energy and Environmental Protection (ICEEP 2016)

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Abstract. Hydrogen sulfide is highly toxic and corrosive component of natural gas that must be removed before natural gas is used in industrial applications. Currently, absorption methods using aqueous solutions of methyl diethanolamine are most commonly employed to remove hydrogen sulfide from natural gas feedstocks. A process analysis of H 2 S absorption in a microchannel is explored in this work. The results indicate that the bubbles formed at the gas-liquid interface are not consistent in size. The gas bubbles become significantly smaller in volume within 2 seconds of gas flow. There is a noticeable difference in the rate of change in bubble volume for solutions with 20 vol% and 40 vol% MDEA solution. There is also a 3.8% -5.3% volume change within 0.6 s when 60 vol%, 80 vol%, and 100 vol% solutions of MDEA are used. From these experiments, the overall mass transfer coefficient for H 2 S was calculated and it was found that the overall mass transfer coefficients L ka increases with increasing MDEA content.

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“…Absorption of acid gas into aqueous solutions of alkanolamines has been one preferred approach of the purification technologies in current industry. Commercially, alkanolamines for the approach are monoethanolamine (MEA), diethanolamine (DEA), diisopropanolamine (DIPA), methyldiethanolamine (MDEA), and 2-amino-2-methyl-L-propanol (AMP) [1]. In the industrial gas processing, there is an increasing interest in gas absorption processes for the selective removal of H 2 S from gas streams with a high ratio of CO 2 to H 2 S. One motivation for this processing route is to increase the H 2 S partial pressure in the regenerator off-gas to sulfur recovery unit.…”

Section: Introductionmentioning

confidence: 99%

Selective absorption of H2S from a gas mixture with CO2 in a microporous tube-in-tube microchannel reactor

Pan

Zhou

et al. 2015

Chemical Engineering and Processing: Process Intensification

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Selective absorption of H2S from gas mixtures into aqueous solutions of blended amines of methyldiethanolamine and 2-tertiarybutylamino-2-ethoxyethanol in a packed column

Cited by 122 publications

References 21 publications

Application of Local Exhaust Ventilation System and Integrated Collectors for Control of Air Pollutants in Mining Company

Application of Local Exhaust Ventilation System and Integrated Collectors for Control of Air Pollutants in Mining Company

Experimental Study on Removal of H2S using MDEA Solution in Microchannel

Selective absorption of H2S from a gas mixture with CO2 in a microporous tube-in-tube microchannel reactor

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