Kinetics and thermodynamics of the phosphine adsorption on the modified activated carbon
Kinetics and thermodynamics of the phosphine adsorption on the modified activated carbon
Bingnan REN1,2()
1. School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; 2. College of Environment and Safety, Taiyuan University of Science and Technology, Taiyuan 030024, China
The kinetics and the thermodynamics of phosphine (PH3) adsorption on the modified activated carbon have been explained for the adsorption process of PH3. This study investigated the kinetic and thermodynamic properties of PH3 adsorption on the activated carbon impregnated with 5% HCl solution. The thermodynamic properties including PH3 adsorption isotherm and adsorption heat were separately investigated at 20°C, 70°C, 90°C. The results showed that the Freundlich-type isotherm equation described the isotherms well. The adsorption capacity increased with increasing temperature between 20°C and 70°C. Between 70°C and 90°C, the adsorption capacity decreased obviously with increasing temperature. The adsorption capacity reached the maximum at 70°C. By analyzing the results of the kinetics and the thermodynamics, we found that the adsorption of PH3 was dominated by physical adsorption at the lower temperature (20°C). Then with increasing temperature, chemical adsorption gradually dominated in the adsorption process. The adsorption capacity decreased at above 70°C is due to the exothermic effects in the process of adsorption.
. Kinetics and thermodynamics of the phosphine adsorption on the modified activated carbon[J]. Frontiers of Chemical Science and Engineering, 2011, 5(2): 203-208.
Bingnan REN. Kinetics and thermodynamics of the phosphine adsorption on the modified activated carbon. Front Chem Sci Eng, 2011, 5(2): 203-208.
Chen S J. The current production status and consumption ways of phosphorus in China. Chemical Industry and Engineering Progress , 2005, 21: 776–778 (in Chinese)
2
Ma L, Ning P, Zhang Y, Wang X. Experimental and modeling of fixed-bed reactor for yellow phosphorous tail gas purification over impregnated activated carbon. Chemical Engineering Journal , 2008, 137(3): 471–479 doi: 10.1016/j.cej.2007.04.032
3
Quinn R, Dahl T A, Toseland B A. An evaluation of synthesis gas contaminants as methanol synthesis catalyst poisons. Applied Catalysis A , 2004, 272: 61–68 doi: 10.1016/j.apcata.2004.05.015
4
Sun H, Hankins N P, Azzopardi B J, Hilal N, Almeida C A P. A pilot-plant study of the adsorptive micellar flocculation process: Optimum design and operation. Separation and Purification Technology , 2008, 62(2): 273–280 doi: 10.1016/j.seppur.2007.08.013
5
Wang X, Ning P, Shi Y, Jiang M. Adsorption of low concentration phosphine in yellow phosphorus off-gas by impregnated activated carbon. Journal of Hazardous Materials , 2009, 171(1–3): 588–593 doi: 10.1016/j.jhazmat.2009.06.046
6
Quinn R, Dahl T A, Diamond B W, Toseland B A. Removal of arsine from synthesis gas using a copper on carbon adsorbent. Industrial & Engineering Chemistry Research , 2006, 45(18): 6272–6278 doi: 10.1021/ie060176v
7
Bandosz T J. Effect of pore structure and surface chemistry of virgin activated carbons on removal of hydrogen sulfide. Carbon , 1999, 37(3): 483–491 doi: 10.1016/S0008-6223(98)00217-6
8
Bandosz T J. On the adsorption/oxidation of hydrogen sulfide on activated carbons at ambient temperatures. Journal of Colloid and Interface Science , 2002, 246(1): 1–20 doi: 10.1006/jcis.2001.7952
9
Alhamed Y A. Adsorption kinetics and performance of packed bed adsorber for phenol removal using activated carbon from dates’ stones. Journal of Hazardous Materials , 2009, 170(2–3): 763–770 doi: 10.1016/j.jhazmat.2009.05.002
10
Bagreev A, Rahman H, Bandosz T J. Study of H2S adsorption and water regeneration of spent coconut-based activated carbon. Environmental Science & Technology , 2000, 34(21): 4587–4592 doi: 10.1021/es001150c
11
Tsai J H, Jeng F T, Chiang H L. Removal of H2S from exhaust gas by use of alkaline activated carbon. Adsorption , 2001, 7(4): 357–366 doi: 10.1023/A:1013142405297
12
Bagreev A, Rahman H, Bandosz T J. Wood-based activated carbons as adsorbents of hydrogen sulfide: a study of adsorption and water regeneration processes. Industrial & Engineering Chemistry Research , 2000, 39(10): 3849–3855 doi: 10.1021/ie0004139
13
Siriwardane R V, Shen M S, Fisher E P, Poston J A. Adsorption of CO2 on molecular sieves and activated carbon. Energy & Fuels , 2001, 15(2): 279–284 doi: 10.1021/ef000241s
14
Adib F, Bagreev A, Bandosz T J. Analysis of the relationship between H2S removal capacity and surface properties of unimpregnated activated carbons. Environmental Science & Technology , 2000, 34(4): 686–692 doi: 10.1021/es990341g
15
Li W C, Bai H, Hsu J N, Li S N, Chen C. Metal loaded zeolite adsorbents for phosphine removal. Industrial & Engineering Chemistry Research , 2008, 47(5): 1501–1505 doi: 10.1021/ie071074n
16
Huang C C, Chen C H, Chu S M. Effect of moisture on H2S adsorption by copper impregnated activated carbon. Journal of Hazardous Materials , 2006, 136(3): 866–873 doi: 10.1016/j.jhazmat.2006.01.025
17
Xiao Y, Wang S, Wu D, Yuan Q. Catalytic oxidation of hydrogen sulfide over unmodified and impregnated activated carbon. Separation and Purification Technology , 2008, 59(3): 326–332 doi: 10.1016/j.seppur.2007.07.042
18
Ren B N. Factors influencing adsorption of PH3 on modified activated carbon. Advanced Materials Research , 2009, 79–82: 39–42 doi: 10.4028/www.scientific.net/AMR.79-82.39
19
Zhang K, Hong J, Cao G, Zhan D, Tao Y, Cong C. The kinetics of thermal dehydration of copper(II) acetate monohydrate in air. Thermochimica Acta , 2005, 437(1–2): 145–149 doi: 10.1016/j.tca.2005.06.038
20
Karlin K D, Kaderli S, Zuberbühler A D. Kinetics and thermodynamics of copper(I)/dioxygen interaction. Accounts of Chemical Research , 1997, 30(3): 139–147 doi: 10.1021/ar950257f
21
Zou W H, Han R P, Chen Z, Shi J,Liu. Characterization and properties of manganese oxide coated zeolite as adsorbent for removal of Copper (II) and Lead(II) ions from solution. Journal of Chemical & Engineering Data , 2006, 51(2): 534–541 doi: 10.1021/je0504008
22
Li S F. Chemical Reaction Engineering. Beijing: Chemical Industry Press, 2005, 66–67 (in Chinese)
