Catalytic oxidation of 2-Propanol over (Cr,Mn,Fe)-Pt/γ-Al₂O₃bimetallic catalysts and modeling of experimental results by artificial neural networks

Abstract

The catalytic activity of transition metals (Cr,Mn,Fe) supported on the Pt/gamma -Al(2)O(3) industrial catalyst was investigated to bring about the complete oxidation of 2-Propanol. Catalytic studies were carried out under atmospheric pressure in a fixed bed reactor. X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and ICP-AES techniques were used to characterize a series of catalysts. Results showed that the Pt-Mn/gamma -Al(2)O(3) (3.88 wt.%Mn) at calcination temperature of 300 degrees C was the most promising catalyst based on activity, which might be contributed to the quantity of manganese loading, the favorable synergetic effects between Pt and Mn and the well-dispersed bimetallic phase. An artificial neural networks (ANN) model was developed to predict the performance of catalytic oxidation process over Pt-Mn/gamma -Al(2)O(3) bimetallic catalyst based on experimental data. For this purpose the Levenberg-Marquardt (LM) learning algorithm was employed to train the model by using laboratory experimental data. A comparison between the predicted results of the designed ANN model and experimental data was also conducted. The developed model can describe the catalytic oxidation over bimetallic catalysts under different conditions.

Formation of a Manganese Tricarbonyl on the MgO Surface from Mn2(CO)10: Characterization by Infrared, Electron Paramagnetic Resonance, and X-ray Absorption Spectroscopies

“…The structure is inferred to be closely comparable to one incorporating an oxometallate ligand that can be regarded as a model of an oxide surface; the corresponding compounds are (n-Bu 4 N) 2 Correspondingly, we infer that the most likely Mn-O s coordination number is 3 and the probable structure of our supported manganese complex is as shown in Scheme 1, where the distances are those corresponding to the preferred EXAFS model 3. a N, coordination number; R, distance between absorber and backscatterer atoms; ∆σ 2 , sigma-squared value (Debye-Waller factor); ∆E 0 , inner potential correction; O*, oxygen of carbonyl group; O s , oxygen atom of MgO. In the fitting, the ∆E 0 values for Mn-C and Mn-O* were constrained to be equal.…”

Preparation and characterization of nano- and non-nanoscale Co3O4spinels obtained from different methods and study of their performance in combustion of aromatics from polluted air-A comparison with Pt/γ-Al2O3performance

“…The result is in agreement with other papers. [1,11] According to Mars van Krevelen mechanism, catalytic oxidation of VOCs is a redox reaction including oxidation of VOC molecule over oxidized sites of catalyst. [2] Based on TPR results the active sites of Co 3 O 4 (OP) can be reduced at the lower reaction temperatures.…”

“…[1][2][3] The emission sources, associated with industrial activity reveal a wide variety of compounds with different chemical compositions, though the ease or difficulty involved in removing them varies considerably. Among all techniques used for remediation of VOCs, the catalytic oxidation is still the most effective technique from the view point of economic and efficiency.…”

Fabrication of Cobalt-Doped Ceria Nanorods for <i>p</i>-Xylene Deep Oxidation: Effects of Cobalt Precursor and Loading

“…1) Among them, catalytic deep oxidation is well-recognized as one of the most favorable solutions due to its high catalytic performance and moderate operating costs. 2,3) In addition, this method permits to remove VOCs perfectly, even at a very dilute concentration and much lower treatment temperature than thermal incineration.…”

“…Therefore, the current efforts have devoted d-transition metal oxide catalysts for VOCs removal instead of the traditional ones. Recently, numerous catalytic systems for VOCs oxidation have been reported such as oxidation of 2-propanol over M-Pt/£-Al 2 O 3 (M = Cr, Mn and Fe); 3) toluene over Pt/CeO 2 , 4) nanostructured CeO 2 Al 2 O 3 , 5) semiconductive ¡-Fe 2 O 3 6) and catalyst system based upon heater-integrated catalyst units using NiO or Cr 2 O 3 ; 7) C 9 to C 10 paraffins and napthtenics on CuO/Al 2 O 3 ; 8) mxylene on CeO 2 Al 2 O 3 ; 5) p-xylene on CuOCeO 2 /ZRM; 9) etc. Frequently, metal oxides based on Cu, Cr, Mn, Fe, Co, and Ni demonstrate high catalytic activity in the deep oxidation.…”