Preparation and investigation of PD/TI‐SBA‐15 catalysts for catalytic oxidation of benzene

Abstract

The feasibility of Pd/Ti‐SBA‐15 catalysts in the elimination of benzene was explored comprehensively. The effects of the titanium incorporation on catalyst physicochemical property and activity were investigated by X‐ray diffraction, N2 adsorption/desorption, Fourier transform infrared spectroscopy, DRUV–vis, NH3‐TPD, scanning electron microscope, and transmission electron microscope techniques. Only a certain quantity of titanium can be incorporated into the support, and titanium has a positive influence on active phase dispersion. Titanium‐modified catalysts possess larger pore diameter than the pure Pd/SBA‐15 and titanium can introduce the acid sites to the support. The evaluation result shows that the titanium incorporation can noticeably improve the catalytic activity, and all evaluated catalysts possess excellent stability, without obviously activity loss during 60 h test. © 2010 American Institute of Chemical Engineers Environ Prog, 2010

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

“…284 Aromatic compounds are considered to pose considerable environmental hazards and are often toxic and/or carcinogenic. 199,285 The catalytic oxidation of BTEX has extensively studied over the past two decades and a large quantity of noble metal (Pd, Pt, Au and Ag) supported catalysts, [286][287][288][289][290][291][292][293] transitional metal (Co, Mn, Cu, Cr, Ni and Ti) oxides catalysts, [294][295][296][297][298][299][300][301][302][303][304] rare earth oxide catalysts, [305][306][307] perovskite-and spinel-based oxides catalysts [308][309][310][311][312][313] and hydrotalcite derived catalysts have been developed and investigated (Tables 2 and 3). [314][315][316][317][318]…”

“…Of the aromatic VOCs, benzene, toluene, ethylbenzene, and xylenes (BTEX) contribute to the majority of the total industrial emissions . Aromatic compounds are considered to pose considerable environmental hazards and are often toxic and/or carcinogenic. , The catalytic oxidation of BTEX has been extensively studied over the past two decades, and a large quantity of supported noble metal (Pd, Pt, Au, and Ag) catalysts, − transitional metal (Co, Mn, Cu, Cr, Ni, and Ti) oxide catalysts, − rare-earth oxide catalysts, − perovskite- and spinel-based oxides catalysts, − and hydrotalcite-derived catalysts have been developed and investigated (Tables and ). − …”

Templated Silica with Increased Surface Area and Expanded Microporosity: Synthesis, Characterization, and Catalytic Application

“…Currently, VOCs catalytic oxidation has been widely investigated over different types of catalysts such as supported noble metals, metal oxides, and mixtures of noble metals and metal oxides [22,23]. Particularly, Pd-loaded catalysts are extensively examined as Pd catalyst is promising for practical applications in hydrocarbons total combustion [24]. Therefore, it is of significant importance to develop effective and highly active catalysts for the total oxidation elimination of VOCs at mild conditions.…”

Ligand-assisted preparation of highly active and stable nanometric Pd confined catalysts for deep catalytic oxidation of toluene

“…2(A) shows the small-angle XRD (SA-XRD) patterns of the synthesized materials. All samples exhibit one intense peak at 0.8-1.0 • along with two weak peaks at 1.3-2.0 • , which can be assigned to the (1 0 0), (1 1 0), and (2 0 0) plane reflections of the two-dimesional hexagonal mesostructure with a space group of p6mm symmetry [29], indicating that the incorporation of Pd has negligible influence on the original structure of SBA-15. However, the intensities of these diffraction peaks have a slight decrease for samples synthesized via the grafting approach, indicating that the mesoporous channels of SBA-15 may be occupied by Pd nanoparticles [23].…”