NOx catalyst Articles
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High-temp wall Flow Ceramic filter
High temperature wall flow ceramic filter which it is made by high temperature firing using a special process comparing to bag filter and spray filter. It has the advanges as below: 1. Ultra-high specific surface area, porosity porosity ≥50%. 2. Filter Pore size Filter pore size≤3um, Completely filtered (Particles) range > 1um. 3. Ultra-thin filter path ≤1.2mm, ultra-low ...
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Selected Literature from Johnson Matthey`s Environmental Catalysts and Technologies Division
SSEC Literature: High Temperature SCR Zeolite Catalyst for NOx Control / SCR Catalyst for NOx Control Stationary Lean Burn Engines / SCR Systems for NOx Control Stationary Lean Burn Engines / Gas Turbine Oxidation Catalyst for the control of CO and VOCs / Oxidation Catalysts for the Control of CO, VOC, HC / BanditoTM - Modular Catalytic Converter for the Control of NOx, CO and THC / Band-ItTM - ...
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Sulfur Compounds Analyzer MEXA-1170SX
The MEXA-1170SX is a continuous gas analyzer for sulfur compounds existing in engine emissions. It can measure SO2 concentration and the amount of total reduced sulfur compounds (TRS), such as H2S, separately. It can also measure the total sulfur compounds (TS) that contains both gaseous compounds and liquid compounds in PM, such as SO3. By utilizing ultra-violet fluorescence (UVF) method and ...
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Exhaust Gas Treatments for NOx Reduction to Add to Global Warming
The enforcement of year 2007 stringent emission norm for reduced NOx reduction/oxides of nitrogen gases from the diesel exhaust and the after treatment to reduce them will add to global warming by several fold according to renowned engine combustion kinetics, emission control process expert and inventor -Mr.Srinivasan Gopalakrishnan, Hydrodrive Systems & Controls Pvt. Ltd, India. His ...
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Application of PdCe-HMOR catalyst as NOx CH₄-SCR system for heavy-duty vehicles moved by natural gas
Abstract In this work a cobalt-free zeolite-based catalyst formulation is proposed for NOx CH4-SCR towards a commercial application of after-treatment system for heavy-duty vehicles moved by natural gas (lean-gas burn engines). PdCe-HMOR catalyst was characterised by H2-TPR, DRS UV–Vis and TEM/EDS. The effect of [CH4]/[NO] in the gas feed was studied in order to assess the catalytic ...
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Catalytic filter technology provides important flexibilityfor controlling PM, NOx, SOx, O-HAPS - Case study
Catalyst-embedded ceramic filters offer a way to remove NOx at lower temperatures, while simultaneously removing PM, SOx, and HCI. The technology also removes organic hazardous air pollutants, THC, dioxins, and mercury. Applications include the Cement NESHAP; Boiler MACT; incinerator CISWI MACT; Hazardous Waste MACT; glass furnaces; ceramics manufacturing, including tracking proppants, kilns, ...
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Innovative Ammonia Control - Case study
Ammonia has increasingly become more of a regulatory concern. Ammonia emissions into the atmosphere have been linked to the formation of fine particulate matter, while ammonia emissions in wastewater are restricted because of the negative affect the chemical has on rivers, lake, and aquifers. Many sources of biofuels contain ammonia or can create ammonia during processing. The following case ...
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Regeneration of Palladium Catalyst for Methane Abatement
Abstract: The exhaust gas of lean burn gas engines contains significant amounts of unburnt methane gas. Since methane is a strong greenhouse gas, reducing methane emissions would greatly improve the environment and provide greenhouse gas emissions credits. Oxidation catalysts containing platinum are commonly used for the elimination of non-methane hydrocarbons (all hydrocarbons except methane). ...
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Zeolite Molecular Sieves Ssz-13 Dessicant
SSZ-13 molecular sieve,with chabazite (CHA) topology, consists of AlO4 and SiO4 tetrahedron connected end to end by oxygen atoms, formed a ellipsoid cage (0.73 nm×1.2 nm)with eight membered ring structure and three-dimensional cross channel structure. The size of pore is 0.38 nm×0.38 nm and the specific surface area is up to 700 m2/g.SSZ-13 shows excellent performance of NOX removal from ...
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Tri-Mer catalytic ceramic filters use glass emissions filter technology with nano-bits of SCR catalyst embedded in the walls - Case study
Filters are placed in housings and operate similarly to a “reverse pulse jet ceramic baghouse.” The filters are 10' long and 6" wide, with a wall thickness of approximately ¾ inch. Learn more information about Tri-Mer&rsquos;s hot gas filtration. The micronized catalyst offers a larger surface area for reaction than conventional SCR, with virtually no diffusion ...
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Catalytic filter technology provides Important Flexibility for Controlling PM, NOx, SOx, O-HAPS - Case study
Catalyst-embedded ceramic filters offer a way to remove NOx at lower temperatures, while simultaneously removing PM, SOx, and HCI. The technology also removes organic hazardous air pollutants, THC, dioxins, and mercury. Applications include the Cement NESHAP; Boiler MACT; incinerator CISWI MACT; Hazardous Waste MACT; glass furnaces; ceramics manufacturing, including tracking proppants, kilns, ...
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Zeolite Molecular Sieve Sapo-34
SAPO-34 from Dalian Haixin Chemical is formed by introducing Si into the Aluminum phosphate framework with PO2+、AlO2+ and SiO2 tetrahedron, electronegativity, surface proton acidic center and exchangeable cations. The silicon aluminum phosphate zeolite with different topological structure and acidity can be prepared by changing the synthesis conditions and the Si content.SAPO-34 is widely used in ...
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Experimental investigation of temperature, fuel and catalyst type on NOx discharge in catalytic boilers
The experimental investigation of temperature effect on the discharge of pollutants in catalytic boilers was carried out in this paper. The comparison of flame and catalytic combustion revealed the advantages of catalytic combustion from the viewpoint of less NOx discharge that was connected with the fact that in catalytic boilers the reaction took a course in the isothermal process. The optimal ...
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Transition metals cobaltites spinel for depollution of NOₓ emissions using SCR technology
Abstract The catalytic performance of various transition metal (M = Cu, Mn, and Ni) cobaltites prepared by nanocasting method were investigated for the selective catalytic reduction (SCR) of NO under lean burn conditions. KIT-6 was used as a hard template in the nanocasting method for preparation of catalysts. The catalyst samples were characterized by various techniques such as XRD, ...
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Wet NOx scrubber - Case study
This project was for a major manufacturer of a tableted OTC analgesic. The manufacturing process was being redesigned, and a critical aspect of the work was the re-engineering of a reactor. The client’s original process, which used nitric acid to dissolve a metal, exhausted virtually 100% nitrogen oxide (NO), a gas that reacts with oxygen to form a brown plume at concentrations as low as ...
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Pharmaceutical Manufacturer Turns NOx Regulations Into an Opportunity – With a 6-Figure Annual Chemical Savings as a Bonus.
This project was for a major manufacturer of a tabletted OTC analgesic. The manufacturing process was being redesigned, and a critical aspect of the work was the re-engineering of a reactor in the initial stage of manufacturing. The client’s original process, which used nitric acid to dissolve a metal, exhausted virtually 100% nitrogen oxide (NO), a toxic, wholly non-water-soluble gas that ...
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Oxygen vacancies on nanosized ceria govern the NOx storage capacity of NSR catalysts
Abstract Pt/BaO/CeO2 catalysts derived from CeO2 nanomaterials with shapes of rods, cubes, and particles were investigated for NOx storage/reduction. Catalytic tests were performed in a transient flow reactor system. A series of characterization techniques including XRD, TEM, XPS, EXAFS, NOx-TPD, H2-TPR and in situ DRIFTS were conducted to investigate the electrical, chemical, and structural ...
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Assessment of copper-iron catalyst supported on activated carbon for low-temperature nitric oxide reduction by hydrogen
Increasing emissions of nitrogen oxides associated with global industrialization necessitates the development of more sustainable NOx-removal systems. This research focused on synthesizing and testing catalytic materials, derived from biomass waste and Earth-abundant metals. These materials were sufficiently reactive to convert NOx into nitrogen, employing hydrogen as the reductant. A catalytic ...
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What are the useful exhaust gas treatment equipment in the factory?
Several types of equipment are used to treat factory exhaust, depending on the specific pollutants that need to be removed. 5 common types of fee processing equipment 1. Wet scrubber: wet scrubber is a type of air pollution control device that uses a liquid (usually water) to remove pollutants from a gas stream. The gas stream is forced through a mist or spray of the liquid, which captures the ...
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Novel manganese oxide confined interweaved titania nanotubes for the low-temperature Selective Catalytic Reduction (SCR) of NOx by NH₃
Abstract A series of manganese confined titania nanotubes (Mn/TNT) prepared by alkaline hydrothermal synthesis technique and were investigated for the Selective Catalytic Reduction (SCR) of NOX with NH3 in the presence of excess (10 vol.%) oxygen. Remarkably, the surface texture and tubular morphology of Mn/TNT-H catalyst greatly promote the NOX conversions in the temperature regime of ...
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