Dealumination of the outer surface of MFI zeolites by ammonium hexafluorosilicateReaction Kinetics, Mechanisms and Catalysis - Tập 54 - Trang 209-215 - 1995
J. M. Silva, M. F. Ribeiro, F. Ramôa Ribeiro, N. S. Gnep, M. Guisnet, E. Benazzi
The treatment of MFI zeolites with ammonium hexafluorosilicate causes a selective dealumination of their outer surface. This dealumination improves the selectivity to the para isomer of m-xylene isomerization.
Catalytic combustion of methane over La2BCoO6 perovskites containing Ni, Cu and Fe: impact of B-sites on oxygen species and catalytic activityReaction Kinetics, Mechanisms and Catalysis - Tập 131 - Trang 737-752 - 2020
H. Rezaei Shadegan, S. Maghsoodi, B. Ghanavati, A. Shahbazi Kootenaei, A. Azimi
The effect of B-site partial substitution on the structure and the catalytic performance of cobalt-based double perovskites (La2BCoO6 where B = Cu, Ni and Fe) was investigated in the catalytic combustion of methane. The synthesized samples were characterized using XRD, XRF, N2-physisorption, H2-TPR, O2-TPD, CH4-TPR and XPS techniques. The XRD results showed the successful synthesis of cobalt-based...... hiện toàn bộ
Synthesis, characterization of vanadium-doped titanate nanotubes nanocatalysts towards degradation of methyl orange, bacteria, and fungusReaction Kinetics, Mechanisms and Catalysis - Tập 136 - Trang 3191-3210 - 2023
Mounia-Aouicha Bouayed, Nawal Ameur, Hanane Chaker, Fawzi Taieb-Brahimi, Sumeya Bedrane, Fatiha Saidi, Redouane Bachir
The dye degradation, antibacterial and antifungal properties of nanotubes based on titanium and vanadium have been investigated. The vanadium doped titanate nanotubes were obtained using hydrothermal method at different vanadium amount. The textural and morphological properties of nanotubes are determined using X-ray diffraction, UV–Visible in reflection diffuse, thermogravimetric analysis, adsorp...... hiện toàn bộ
Insight into the reaction mechanism of the conversion of methylbutynol on silica-aluminaReaction Kinetics, Mechanisms and Catalysis - Tập 94 - Trang 63-69 - 2008
Murad AlSawalha, Frank Roessner
The conversion of methylbutynol (MBOH) over commercially available silicaalumina solids was studied. The formation of 3-methyl-3-butene-2-one (MIPK) was explained in terms of the cooperative action of both Brönsted acidic and coordinatively unsaturated surface sites. With increasing silica content the number of defect sites decreases and well ordered silica-alumina is formed.
The interaction of molybdenum and titanium in mesoporous materials for olefin epoxidationReaction Kinetics, Mechanisms and Catalysis - Tập 135 - Trang 317-331 - 2022
Jian Zhang, Huien Zhang, Liping Liu, Zhongfa Chen
A series of bimetallic Mo–Ti–SBA-15-(X), and monometallic Mo/Ti–SBA-15-(X) mesoporous materials were synthesized by direct one-step hydrothermal method. The materials were characterized by XRD, N2 adsorption/desorption, XPS, SEM, EDX, TEM and ICP-AES. XRD results clearly demonstrated that the incorporation of molybdenum and titanium species in the SBA-15 framework little affect the mesoscopic natu...... hiện toàn bộ
A new facile synthesis, kinetic mechanism and some thermodynamic studies of thermal transformation of α-LiZnPO4·H2OReaction Kinetics, Mechanisms and Catalysis - Tập 128 - Trang 809-829 - 2019
Nantawat Phonchan, Chanaiporn Danvirutai, Pittayagorn Noisong, Sujittra Youngme, Sira Sansuk
α-LiZnPO4·H2O was successfully synthesized via a new simple route in an aqueous media at ambient temperature. The as-prepared and the calcined powders were confirmed by standard characterization methods. The SEM micrographs of the title compound and its dehydration product were studied. The experimental enthalpy of dehydration was evaluated from DSC data, which was found to be close to the standar...... hiện toàn bộ