Academic literature on the topic 'Langmuir-Hinshelwood equation'

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Journal articles on the topic "Langmuir-Hinshelwood equation"

1

Słomkiewicz, Piotr M. "Determination of the Langmuir–Hinshelwood kinetic equation of synthesis of ethers." Applied Catalysis A: General 269, no. 1-2 (2004): 33–42. http://dx.doi.org/10.1016/j.apcata.2004.03.055.

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2

Net, S., L. Nieto-Gligorovski, S. Gligorovski, and H. Wortham. "Heterogeneous ozonation kinetics of 4-phenoxyphenol in presence of photosensitizer." Atmospheric Chemistry and Physics Discussions 9, no. 5 (2009): 21647–68. http://dx.doi.org/10.5194/acpd-9-21647-2009.

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Abstract. In this work we have quantitatively measured the degradation of 4-phenoxyphenol adsorbed on silica particles following oxidative processing by gas-phase ozone. This was performed under dark conditions and in presence of 4-carboxybenzophenone under simulated sunlight irradiation of the particles surface. At mixing ratio of 60 ppb which corresponds to strongly ozone polluted areas, the first order decay of 4-phenoxyphenol is k1=9.95×10−6 s−1. At very high ozone mixing ratio of 6 ppm the first order rate constants for 4-phenoxyphenol degradation were the following: k1=2.86×10−5 s−1 unde
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3

Net, S., L. Nieto-Gligorovski, S. Gligorovski, and H. Wortham. "Heterogeneous ozonation kinetics of 4-phenoxyphenol in the presence of photosensitizer." Atmospheric Chemistry and Physics 10, no. 4 (2010): 1545–54. http://dx.doi.org/10.5194/acp-10-1545-2010.

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Abstract. In this work we have quantitatively measured the degradation of 4-phenoxyphenol adsorbed on silica particles following oxidative processing by gas-phase ozone. This was performed under dark conditions and in the presence of 4-carboxybenzophenone under simulated sunlight irradiation of the particles surface. At the mixing ratio of 60 ppb which corresponds to strongly polluted ozone areas, the first order of decay of 4-phenoxyphenol is k1=9.95×10−6 s−1. At a very high ozone mixing ratio of 6 ppm the first order rate constants for 4-phenoxyphenol degradation were the following: k1=2.86×
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4

Hejtmánková, Alena, Karel Jeřábek, and Karel Setínek. "Kinetics of methyl tert. butyl ether synthesis in gaseous phase." Collection of Czechoslovak Chemical Communications 55, no. 4 (1990): 1033–37. http://dx.doi.org/10.1135/cccc19901033.

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Kinetics of methyl tert.butyl ether synthesis from methanol and isobutene was measured in gaseous phase at 85 °C and atmospheric pressure on macroreticular ion exchanger catalyst containing strongly acidic functional groups SO3H and on the same catalyst partially neutralized by sodium and iron ions. The form of the best Langmuir-Hinshelwood type kinetic equation suggests absorption of the reactants in the polymer mass causing ìswellingî of it and influencing the accessibility of active sites by the reactants. Neutralization of the catalyst by metal ions suppresses this effect.
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5

Bandyopadhyay, Debajyoti, and Ahindra Ghosh. "Validity of rate equation based on Langmuir-Hinshelwood mechanism for gasification of carbon - a reappraisal." Steel Research 67, no. 3 (1996): 79–86. http://dx.doi.org/10.1002/srin.199605462.

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6

Urmès, Caroline, Jean-Marc Schweitzer, Amandine Cabiac, and Yves Schuurman. "Kinetic Study of the Selective Hydrogenation of Acetylene over Supported Palladium under Tail-End Conditions." Catalysts 9, no. 2 (2019): 180. http://dx.doi.org/10.3390/catal9020180.

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The kinetics of the selective hydrogenation of acetylene in the presence of an excess of ethylene has been studied over a 0.05 wt. % Pd/α-Al2O3 catalyst. The experimental reaction conditions were chosen to operate under intrinsic kinetic conditions, free from heat and mass transfer limitations. The data could be described adequately by a Langmuir–Hinshelwood rate-equation based on a series of sequential hydrogen additions according to the Horiuti–Polanyi mechanism. The mechanism involves a single active site on which both the conversion of acetylene and ethylene take place.
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7

Xu, Huan Yan, Xue Li, Yan Li, Ping Li, and Wei Chao Liu. "Photocatalytic Degradation of Methyl Orange by TiO2/Schorl Photocatalyst: Kinetics and Thermodynamics." Applied Mechanics and Materials 713-715 (January 2015): 2789–92. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.2789.

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An active dye, Methyl Orange (MO) was employed as the target pollutant to evaluate the photocatalytic activity of TiO2/schorl composite and the kinetics and thermodynamics of this process was emphasized in this work. Langmuir–Hinshelwood kinetic model was employed for the kinetic studies and the results revealed that the process of MO photocatalytic discoloration by TiO2/schorl composite followed one order reaction kinetic equation under different conditions. The reaction rate constant (k) increased with initial MO concentration decreasing. When the catalyst dosage or solution pH increased,kva
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8

Frontistis, Z., M. Papadaki, and D. Mantzavinos. "Modelling of sonochemical processes in water treatment." Water Science and Technology 55, no. 12 (2007): 47–52. http://dx.doi.org/10.2166/wst.2007.376.

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The mechanisms and kinetics of the sonochemical degradation of organic molecules in water are relatively complex since several parameters such as physicochemical properties, substrate concentration, water matrix, reactor geometry, ultrasound properties (frequency, power, emission system) all typically affect the process. In this work, simple kinetic models were used to predict the degradation of 2-chlorophenol and sodium dodecylbenzene sulphonate in aqueous solutions and verified against experimental data taken from previous studies. A pseudo-first order kinetic expression can adequately descr
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9

Du, Qingyang, Huijun Xu, Zhihao Yu, et al. "Study on the Preparation of Zn-Doped NaA Molecular Sieve and Its Photocatalytic Performance." Journal of Physics: Conference Series 2168, no. 1 (2022): 012026. http://dx.doi.org/10.1088/1742-6596/2168/1/012026.

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Abstract Zn-doped NaA molecular sieves were prepared by hydrothermal method using zinc nitrate, sodium metaaluminate, silica sol, etc. as raw materials. The samples were characterized by XRD, SEM, FT-IR, etc., using 300W xenon lamp as the light source. Rhodamine B (RhB) was used as the target degradant for photocatalytic experiments for its photocatalytic activity. The results showed that zinc ion doping increased the number of active sites on the NaA molecular sieve, effectively reduced the photoelectron-hole recombination probability in the molecular sieve, and improved the photocatalytic ac
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10

Lozano-Morales, S., Graciela Morales, Miguel López Zavala, Augusto Arce-Sarria, and Fiderman Machuca-Martínez. "Photocatalytic Treatment of Paracetamol Using TiO2 Nanotubes: Effect of pH." Processes 7, no. 6 (2019): 319. http://dx.doi.org/10.3390/pr7060319.

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Pharmaceuticals are considered among the group of emerging contaminants. Paracetamol is a moderate painkiller, which has been detected in ground and surface water. Photodegradation of paracetamol at a wavelength of radiation of 254 nm with TiO2 nanotubes was studied by UV-spectroscopy, HPLC and measurement of the potential zeta in dependence of the solution pH. The efficiency of the photodegradation of paracetamol (20 mg L−1) was 99% after 100 min exposure. Application of the Langmuir-Hinshelwood equation allowed the evaluation of the rate constant. Non-organic by-products were detected under
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