Influence of Fe‐modified Mn–Ce–Fe–Co–Ox/P84 catalytic filter materials for low‐temperature NO removal synergistic Hg0oxidation

Shi, Guangwei; Liu, Meng; Li, Yinsheng; Li, Tao; Duan, Yufeng

doi:10.1002/apj.2677

Cited by 7 publications

(4 citation statements)

References 35 publications

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“…The gaseous NO reacts with -NH 2 forming N 2 and H 2 O, while simultaneously a strong inductive effect between Fe 3+ and V 4+ initiates a thermodynamically feasible redox reaction, regenerating the oxidation states for the consequent reduction cycles. In order to further validate these redox systems for NO x reductions, Shi et al 216 prepared a series of Mn-Ce-Fe-Co-O x /P84 (polyimide) catalytic filter materials to investigate the low-temperature catalytic activity of NO x , under mixed atmospheric conditions with water and sulfur. Activity of Mn-Ce-Fe-Co-O x in molar ratios of 4:5:1.25:1 achieved 81% NO x conversion at 170 °C.…”

Section: Novel Materials For Selective Catalytic Reduction (Scr) Of N...mentioning

confidence: 99%

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Da Costa,

Bukkarapu,

Fernandes

et al. 2024

Energy Fuels

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Although diesel after-treatment techniques demonstrate a substantial decrease in tailpipe emissions, the primary goal continues to be attaining nearly zero emissions to comply with current regulatory requirements and foreseeable imminent rigorous regulations. To achieve this objective, engine combustion systems and fuel formulations require fine-tuning. Taking insights from the recent literature, this review examines various processes, including homogeneous in situ methods, the incorporation of fuel-borne catalysts, and the use of biofuels. Despite progress in in-cylinder pollution mitigation techniques like low-temperature combustion, which exhibits substantial reductions in oxides of nitrogen (NO x ) and soot emissions, it is crucial to consistently advance technology to conform to evolving emission regulations and environmental concerns. A discussion is presented regarding the advantages and disadvantages of the homogeneous charge compression ignition (HCCI) mode and their potential for the future, focusing on biodiesel-fueled HCCI engines. The review assesses the effectiveness of thermal management strategies and engine design modifications that extend the operational range of HCCI engines powered by biodiesel in light of the inherent limitation of a restricted engine operating range. The review critically examines the merits and demerits of biofuels and HCCI systems and provides an essential analysis of current after-treatment approaches. With an imperative focus, the primary aim of this review is to ascertain modern catalysts designed explicitly for use in contemporary combustion systems. An exhaustive examination of the progress made in diesel oxidation catalysts, selective catalytic reduction techniques, lean NO x traps, diesel particulate filters, and catalyst regeneration is presented. The concluding remarks analyze the catalytic characteristics necessary for smooth incorporation with modern technological developments in various combustion systems.

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Section: Novel Materials For Selective Catalytic Reduction (Scr) Of N...mentioning

confidence: 99%

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Da Costa,

Bukkarapu,

Fernandes

et al. 2024

Energy Fuels

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“…Recently, however, significantly novel materials and processes have been developed to efficiently accomplish mercury removal from air and water at plant scale 9–13 . Furthermore, much research has been done to oxidize the mercury vapour from Hg 0 to Hg 2+ to blunt its detrimental consequences on lungs and brain after inhalation 14–16 …”

Section: Introductionmentioning

confidence: 99%

“…[9][10][11][12][13] Furthermore, much research has been done to oxidize the mercury vapour from Hg 0 to Hg 2+ to blunt its detrimental consequences on lungs and brain after inhalation. [14][15][16] To overcome the drawback of graphite erosion, the present work employs tubular packing of stainless steel SS-304 with tungsten carbide (WC) coated on its outer surface using indigenously developed laser-directed energy deposition (LDED) technique for application as a plausible alternative to conventional graphite packing. Meneghini and Bertin observed that the coating on outer surface of amalgam wettable material (here, SS-304) should be pure or compound carbide of electrically conducting transition metals such as titanium, zirconium, niobium, tantalum or tungsten.…”

Section: Introductionmentioning

confidence: 99%

Decomposition kinetics of sodium amalgam in fixed bed of WC‐coated tubular SS‐304 packing: Modelling and validation

Manivannan

Mandal

Dabhade

et al. 2023

Asia-Pacific J Chem Eng

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Erosion of graphite packing in continuously operating fixed bed sodium amalgam decomposers leads to performance degradation accompanied by clogging in the downstream process lines which not only increases the maintenance and catalyst refilling costs but also aggravates the risk of mercury vapour exposure. To overcome this drawback, the present work utilizes tubular SS-304 packing coated with tungsten carbide (WC) on the outer surface. The coating is obtained using an indigenously developed laser-directed energy deposition facility. Dedicated experimental setup is developed for each set of process parameters to comparatively study the fixed bed decomposition kinetics at steady state for three types of WC-coated SS-304 packing and a conventional spherical graphite packing. In parallel, a numerical 3D-1D model is implemented using open source computational solvers and is experimentally validated. The algorithm of this model is based on proposed drop-fill approach for WC-coated SS-304 packing and modified drop approach for spherical graphite packing, respectively. In terms of decomposition rates, the performance of WC-coated SS-304 packing surpasses that of spherical graphite packing at high amalgam flowrates; meanwhile, the average alteration in experimental steadystate temperature profile after continuous operation of 2 years is around 2% for WC-coated SS-304 packing as compared to nearly 17% for spherical graphite packing.

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“…The composite catalytic ber lter material (Shi 2021) is prepared by combining the catalytic technology with the lter material ber, the combined removal of dust, NO x and dioxins by existing dedusting equipment is one of the important ways to realize the low-cost and high-e ciency coordinated control of multi-pollutants in ue gas (Li 2014). The research emphasis of the composite catalytic ber lter material is the basic material and modi cation of the catalytic lter material.…”

Section: Introductionmentioning

confidence: 99%

Effect of additives on sulfur resistance of catalytic filter material during denitrification and synergistic decomposition of 1,2-DCBz

Wan,

Liu,

et al. 2023

Environ Sci Pollut Res

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Modi ed Mn-Ce/P84 catalytic lter material can be used to achieve high removal e ciency of NO x and 1,2-DCBz in bag-ltering dust precipitator synergistic removal of multiple pollutants. However, the presence of SO 2 in the actual industrial ue gas has an adverse impact on the catalytic performance of the catalytic lter material. In this paper, a kind of Mn-Ce catalytic lter material was prepared by impregnation method, which was modi ed by Fe, Cu and Co, respectively. As a result, the sulfur resistance of the catalytic lter material was improved. The change of catalytic activity of the three kinds of modi ed catalytic lter material at different concentrations was compared in SO 2 ue gas xed bed system. And the modi ed catalytic lter materials were characterized by SEM, BET, XPS, XRD and H 2 -TPR. When the temperature was over 80 ℃, [NH 3 ] = [NO] = 400 ppm, [O 2 ] = 8%, [1,2-DCBz] = 320 ppm, and [Flow rate] = 1 m/min, different concentrations of SO 2 were injected into the simulated ue gas to test the denitri cation activity of the catalytic lter material. The results showed that the sulfur resistance of the catalyst could be effectively increased by the introduction of three elements. Under the low SO 2 concentration of 150 ppm, the denitri cation activity and 1,2-DCBz activity of Fe, Co and Cu modi ed lter material were increased, and the sulfur resistance of Fe was better under the ue gas conditions of 300 ppm and 450 ppm SO 2 . Under the condition of 450 ppm SO 2 and 200 ℃ reaction, 93.4%denitri cation e ciency and 96.1% 1,2-DCBz removal e ciency could be achieved by using modi ed Fe-Mn-Ce catalytic lter material.

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Influence of Fe‐modified Mn–Ce–Fe–Co–O_x/P84 catalytic filter materials for low‐temperature NO removal synergistic Hg⁰oxidation

Cited by 7 publications

References 35 publications

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Decomposition kinetics of sodium amalgam in fixed bed of WC‐coated tubular SS‐304 packing: Modelling and validation

Effect of additives on sulfur resistance of catalytic filter material during denitrification and synergistic decomposition of 1,2-DCBz

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