catalyst support Articles | Environmental XPRT

Effect of soot on N₂O formation over pt based diesel oxidation catalyst supported on microporous TiO₂

Abstract The N2O formation over the diesel oxidation catalyst supported on microporous TiO2 has been investigated in the presence of the soot to simulate cold start or regeneration condition. The platinum (Pt) catalyst entrapped in micropore was resulted in the increase of the catalytic activity compared to the Pt catalyst supported on alumina. Also, it was shown that the presence of the soot ...

May 4, 2017

By ECO Physics AG

Performance improvement of TiO2 supported on adsorbents for photocatalytic degradation of MEK in air

Photocatalytic degradation of Methyl Ethyl Ketone (MEK) was carried out in gas phase using TiO2 supported on different adsorbents. Based on size and surface area, three different adsorbents, montmorillonite, β-zeolite and MCM-41 were tested. A fluidised bed annular photoreactor fitted with either 254 or 365 nm lamps was used for the photodegradation studies. The removal rates of MEK were higher ...

Apr. 22, 2008

By Inderscience Publishers

A study on physico–chemical properties and activity of Co–based catalysts supported on SBA–15 in the Fischer–Tropsch synthesis

Cobalt catalysts supported on SBA–15 and SBA–15, modified by trimethylbenzene (TMB) were prepared from cobalt nitrate and cobalt acetate. Physico–chemical characteristics and activity of the obtained catalysts in Fischer–Tropsch Synthesis at 0.7 MPa were investigated. The results indicate that the use of TMB led to a widening the pores of SBA–15, improving the dispersity of cobalt oxide particles ...

Apr. 8, 2013

By Inderscience Publishers

Enhanced Pd pillared clays by Rh inclusion for the catalytic hydrodechlorination of chlorophenols in water

Bimetallic Pd–Rh catalysts supported on pillared clays have been prepared and tested for aqueous-phase hydrodechlorination (HDC) using 4-chlorophenol (4-CP) as target compound. These bimetallic catalysts combine the higher activity of Rh with the better stability of Pd found in previous works with monometallic catalysts. Different combinations of Pd and Rh amounting to 1 wt% total metal load were ...

Jan. 1, 2012

By IWA Publishing

Features of porous titanium

Porous titanium, also named as sintered titanium and titanium foams, is sintered from titanium powder. It has pore structure exhibit high specific strength, high energy absorption, excellent corrosion resistance and biocompatibility. Generally, porous titanium processed from irregular titanium or titanium alloy irregular powder. It can be isostatically pressed, molded, and extruded. The main ...

Oct. 16, 2019

By Edgetech Industries LLC

Shell Chemicals Canada, LTD

SHELL CHEMICALS CANADA LTD. , part of one of the largest petrochemical operations in the world, installed the CATSCAN® performance monitoring solution from Pavilion Technologies and CRI Catalyst Company to analyze day-to-day catalyst performance, enhance support, perform 'what-if' scenarios, and manage catalyst decline ...

Dec. 9, 2008

By Rockwell Automation, Inc.

Studies on nickel nanoparticle attachment on surface modified carbon nanotubes by wet chemical method

Wet chemical method is a relatively simple technique, which has been used for attaching nickel nanoparticles homogeneously on multi-walled carbon nanotubes (MWCNT). The MWCNT was synthesised by catalytic chemical vapour deposition (CCVD) method. The surface of MWCNT was modified by treating with boiling conc. nitric acid. Carbon nanotubes dispersed in nickel nitrate solution were heat treated ...

Aug. 18, 2010

By Inderscience Publishers

Synthesis of ZnO-CuO/MCM-48 photocatalyst for the degradation of organic pollutions

The photocatalytic properties of ZnO-CuO catalysts supported on siliceous MCM-48 (Mobil Composition of Matter No. 48) for the degradation of organic pollutions such as methylene blue and salicylic acid under UV light irradiation were investigated. These catalysts were prepared by impregnation of MCM-48 with a mixed aqueous solution of copper acetate and zinc acetate. X-ray diffraction, ...

Apr. 4, 2017

By IWA Publishing

Catalytic activity and stability of silver supported on multiwalled carbon nanotubes

Catalytic activity and stability of silver supported on functionalised multiwalled carbon nanotubes (Ag–f–MWCNTs) is investigated. NaBH4 reduction of organic dyes, viz. rhodamine 6G (R6G) and orange G (OG) was used as model reaction. Rate of reduction of dyes was found to be greatly enhanced in presence of Ag–f–MWCNTs, and proportional to the amount of Ag–f–MWCNTs used, which indicates the high ...

Feb. 15, 2012

By Inderscience Publishers

Photo-degradation of butyl parahydroxybenzoate by using TiO<sub>2</sub>-supported catalyst

Photo-degradation of butyl parahydroxybenzoate by using TiO₂-supported catalyst

The present work evaluates the potential of the photocatalysis (PC) process for the degradation of butylparaben (BPB). Relatively high treatment efficiency was achieved by comparison to photochemical process. Prior to photocatalytic degradation, adsorption (AD) of BPB occurred on the titanium dioxide (TiO2)-supported catalyst. AD was described by Langmuir isotherm (KL = 0.085 L ...

May 16, 2013

By IWA Publishing

Catalytic oxidation and spectroscopic analysis of simulated wastewater containing acid chrome blue K by using chlorine dioxide as oxidant

An activated carbon-MnO2 catalyst was prepared by the dipping-calcination method using activated carbon as catalyst support. The catalyst was used for the catalytic oxidation of simulated acid chrome blue K wastewater. The COD removal efficiency and decolor efficiency by catalytic oxidation are 72.0% and 87.8%, respectively, at the condition of wastewater's COD is 2,418 mg/L, the optimum pH value ...

Apr. 1, 2010

By IWA Publishing

The effect of several parameters on catalytic denitrification of water by the use of H₂ in the presence of O₂ over metal supported catalysts

The present paper involves a detailed study of the selective catalytic reduction of nitrates in aqueous mediums by the use of H2 in the presence of O2 over monometallic and bimetallic supported catalysts. In this study, an attempt has been made to improve the denitrification efficiency (XNO3−, SN2) of several catalysts by regulating some experimental parameters that are involved in the ...

Nov. 29, 2013

By IWA Publishing

Recovery of nickel from spent catalyst by single- and multi-stage leaching process

Nickel-supported catalyst is used in petroleum, fertiliser and iron industries. This research studied the possibility of recovering nickel by leaching the ground catalyst with sulphuric acid. The leaching was done in single stage and multi-stages. The results obtained in single-stage leaching showed that the percentage recovery of nickel increased with increasing acid concentration used up to 25% ...

Dec. 9, 2008

By Inderscience Publishers

Preventing maritime transport of pathogens: the remarkable antimicrobial properties of silver-supported catalysts for ship ballast water disinfection

Ship ballast water (SBW) antimicrobial treatment is considered as a priority issue for the shipping industry. The present work investigates the possibility of utilizing antimicrobial catalysis as an effective method for the treatment of SBW. Taking into account the well-known antimicrobial properties of ionic silver (Ag+), five silver-supported catalysts (Ag/γ-Al2O3) with various loadings ...

May 5, 2017

By IWA Publishing

Effect of support and second metal in catalytic in-situ generation of hydrogen peroxide by Pd-supported catalysts: application in the removal of organic pollutants by means of the Fenton process

A catalytic system for the generation of H2O2 from formic acid and oxygen at ambient conditions has been developed. Pd-supported catalysts (Pd/C, Pd/TiO2 and Pd/Al2O3) have been tested, showing that for bulk purposes Pd/Al2O3 is more favourable while for in-situ applications Pd/TiO2 seems to be preferable. However, when these catalysts were tested in the in-situ H2O2 generation for the oxidation ...

Jan. 1, 2011

By IWA Publishing

Development of a microfuel processor: oxidative steam reforming of ethanol and water-gas shift reaction on noble metal catalysts in a microreactor

The oxidative steam reforming of ethanol (OSRE) and water-gas shift (WGS) reactions were studied in a microchannel reactor. For OSRE, the experiments were conducted at atmospheric pressure, with water to ethanol molar ratio of 3 or 6 and oxygen to ethanol molar ratio ranging from 0.5 to 1.5, over a temperature range of 350–550°C on Rh/CeO 2 /γ-Al 2 O 3 catalysts. Compared to SRE, the ...

Dec. 2, 2013

By Inderscience Publishers

Electro-thermal treatment optimization of high concentration ammonia nitrogen by gaseous oxidation in liquid phase (GOLP)

This study is focused on optimizing the treatment parameters for high concentration ammonia using gaseous oxidation in liquid phase (GOLP). The conversion of ammonia was achieved electro-thermally over mono-crystalline silicon supported CoOx catalyst. The experimental results demonstrated that factors including the co-anions, pH of the solutions, air flowrate and the current showed apparent ...

Jan. 1, 2011

By IWA Publishing

Photocatalytic degradation of rhodamine B, paracetamol and diclofenac sodium by supported titania-based catalysts from petrochemical residue: effect of doping with magnesium

Three different lots of a residual Ziegler-Natta catalyst slurry (bearing Ti and Mg) obtained from an industrial petrochemical plant were employed as sources for the photocatalyst supported on silica. The effect of additional magnesium (1.0–25.0 wt% Mg/SiO2) on the photocatalytic properties of the doped materials was investigated. Doping the titania-based photocatalyst with Mg results in a ...

Sep. 6, 2016

By IWA Publishing

Selective catalytic reduction of nitric oxide over copper oxide and cerium oxide catalysts

The selective catalytic reduction of nitric oxide with hydrocarbons in an oxygen-containing simulated flue gas has been investigated for a series of copper oxide and cerium oxide alumina supported catalysts at 600–775 K. The activity of these catalysts for the reduction of NO by methane or propane has been investigated in simulated flue gas. The effects of sulphates on the catalyst, and of water ...

Jan. 26, 2004

By Inderscience Publishers

Enhanced electrochemical oxidation of Acid Red 3R wastewater with iron phosphomolybdate supported catalyst

Electrochemical oxidation of Acid Red 3R (AR3R) was investigated with the new catalyst of iron phosphomolybdate (FePMo12) supported on modified molecular sieves type 4 Å (4A) as packing materials in the reactor. The results of the Fourier transform infrared spectroscopy and X-ray diffraction indicated that the heteropolyanion had a Keggin structure. The optimal conditions for ...

Mar. 27, 2015

By IWA Publishing

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