X-ray diffraction and photoelectron spectroscopy studies of MoO2 as catalyst for the partial oxidation of isooctane

2009 ◽  
Vol 603 (15) ◽  
pp. 2327-2332 ◽  
Author(s):  
Oscar Marin-Flores ◽  
L. Scudiero ◽  
Su Ha
Keyword(s):  
Partial Oxidation ◽  
Photoelectron Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spectroscopy Studies

scholarly journals Термодинамические свойства оксипентафторида ванадия (IV), (NH-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=-VOF-=SUB=-5-=/SUB=-

2020 ◽  
Vol 62 (7) ◽  
pp. 1123
Author(s):  
Е.В. Богданов ◽  
Е.И. Погорельцев ◽  
А.В. Карташев ◽  
М.В. Горев ◽  
М.С. Молокеев ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Photoelectron Spectroscopy ◽  
Single Phase ◽  
Dielectric Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Limits Of Stability ◽  
Three Phase ◽  
Temperature Dependences ◽  
Spectroscopy Studies

Abstract The (NH_4)_3VOF_5 crystals have been synthesized and their homogeneity and single-phase structure has been established by the X-ray diffraction, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy studies. The investigations of the temperature dependences of specific heat, entropy, strain, and pressure susceptibility show the occurrence of three phase transitions caused by the structural transformations in the (NH_4)_3VOF_5 crystals. The T – p phase diagram shows the temperature limits of stability of the crystalline phases implemented in (NH_4)_3VOF_5. The optical and dielectric studies disclose the ferroelastic nature of the phase transitions. An analysis of the experimental data together with the data on the isostructural (NH_4)_3VO_2F_4 crystal makes it possible to distinguish the physical properties of oxyfluorides containing vanadium of different valences (IV and V).

Synchrotron X-ray diffraction and X-ray photoelectron spectroscopy studies of NaAlH4 containing Ti–Zr hydride additives

2009 ◽  
Vol 486 (1-2) ◽  
pp. 436-441 ◽  
Author(s):  
Chubin Wan ◽  
Xin Ju ◽  
Ying Qi ◽  
Shumao Wang ◽  
Xiaopeng Liu ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spectroscopy Studies

Effect of noble metals on selective detection of liquid petroleum gas by SnO2

1998 ◽  
Vol 13 (7) ◽  
pp. 1780-1785 ◽  
Author(s):  
A. R. Phani ◽  
M. Pelino
Keyword(s):  
Photoelectron Spectroscopy ◽  
Noble Metals ◽  
Electrical Response ◽  
Chemical Species ◽  
Gaseous Mixture ◽  
High Sensitivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Liquid Petroleum Gas ◽  
Spectroscopy Studies

The present investigation deals with the electrical response of doped SnO2 to improve the selectivity for liquid petroleum gas (LPG) in the presence of CO and CH4, by utilizing noble metal sensitizers such as Pd, Pt, and Rh. SnO2 with the addition of Pd (1.5 wt. %) or Pt (1.5 wt. %) sintered at 800 °C which have shown high sensitivity toward LPG with no cross interference of CO and CH4 at an operating temperature of 350 °C. The results suggest the possibility of utilizing the sensor for the detection of this hydrocarbon gaseous mixture. X-ray diffraction studies have been carried out to evaluate the crystallite size as a function of sintering temperature; x-ray photoelectron spectroscopy studies have been carried out to define the possible chemical species involved in the gas-solid interaction and the sensitivity enhancing mechanism of the SnO2/Pd sensor element toward LPG.

Glancing-angle X-ray diffraction and X-ray photoelectron spectroscopy studies of nitrogen-implanted tantalum

1989 ◽  
Vol 115 ◽  
pp. 73-77 ◽  
Author(s):  
P.M Raole ◽  
A.M Narsale ◽  
D.C Kothari ◽  
P.S Pawar ◽  
S.V Gogawale ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glancing Angle ◽  
Spectroscopy Studies

scholarly journals Partial Oxidation of Propylene over as Prepared and Acid Enriched Bi2Mo1-xWxO6 System

2017 ◽  
Vol 12 (2) ◽  
pp. 197
Author(s):  
Shambhu Sakharam Parab ◽  
S.J. Naik ◽  
A.V. Salker
Keyword(s):  
Catalytic Activity ◽  
Partial Oxidation ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Reaction Engineering ◽  
X Ray Diffraction ◽  
X Ray ◽  
Reitveld Refinement ◽  
Sol Gel Process ◽  
W Doping

The compounds Bi2Mo1-xWxO6 (x = 0.0, 0.2, and 0.4) were obtained through a Citrate sol-gel process. Thermogravimetric differential thermal analysis (TG-DTA), X-ray diffraction (XRD), Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) techniques were used for characterization. Reitveld refinement of the XRD data confirmed the crystal structure of all the compositions to be orthorhombic, having Pca21 space group. XPS studies indicated the presence of +6 as well as +4 oxidation state for Mo. Surface acid enrichment of all the catalysts was done and monitored by NH3-TPD studies. Partial oxidation of propylene was studied over all the compounds. The W doping was found to increase the catalytic activity. Moreover, as-prepared catalysts and acid enriched catalysts were compared for their catalytic activity wherein, acid-enriched catalysts showed the improved conversion of propylene without hampering the product selectivity profile. Copyright © 2017 BCREC Group. All rights reservedReceived: 16th September 2016; Revised: 1st December 2016; Accepted: 9th March 2017How to Cite: Parab, S.S., Naik, S.J., Salker, A.V. (2017). Partial Oxidation of Propylene over as Prepared and Acid Enriched Bi2Mo1-xWxO6 System. Bulletin of Chemical Reaction Engineering & Catalysis, 12 (2): 197-205 (doi:10.9767/bcrec.12.2.702.197-205)Permalink/DOI: http://dx.doi.org/10.9767/bcrec.12.2.702.197-205

Sign in / Sign up

Export Citation Format

Share Document