Copper-Exchanged Philippine Natural Zeolite as Potential Alternative to Noble Metal Catalysts in Three-Way Catalytic Converters

Guerrero, Lailyn M.; Mendoza, Jenica F.; Ong, Kim Thomas V.; Olegario, Eleanor M.; Ferrer, Emmanuel L.

doi:10.1007/s13369-019-03882-y

Cited by 8 publications

(5 citation statements)

References 16 publications

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“…Air emissions pose a serious threat to the environment and human health [1] . Besides being an air pollutant, sulfur has a blocking effect on many pollution control technologies affecting air emissions control [2].…”

Section: Introductionmentioning

confidence: 99%

“…Inadequate petroleum refining capacities have resulted in the importation of petroleum products around the world with nonuniform quality [3]; despite regulatory limits, petroleum fuels still contain significant levels of sulfur which causes the emission of sulfur oxides (SO x ) that contribute to decreased air quality impacting adversely the environment and the human health [4, 5]. Every year, millions of metric tons of air pollutants are emitted worldwide into the atmosphere, and a significant part of these emissions come from the combustion of fossil fuels such as gasoline, diesel, and natural gas [1] .…”

Section: Introductionmentioning

confidence: 99%

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Desulfurization of Gasoline and Diesel by Fly Ash‐Derived FAU Zeolite

Hossi,

Nkazi,

van der Merwe

et al. 2024

Chem Eng & Technol

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Sulfur in fossil fuels is a major environmental and public health concern worldwide due to emissions of sulfur oxides formed during combustion. This may require new developments or upgrades of existing refining technologies. Hence, further desulfurization of gasoline and diesel to combat hazardous emissions could be a significant step toward environmental protection. In this study, adsorptive desulfurization of gasoline and diesel was achieved using a low‐cost fly ash‐derived faujasite (FAU) zeolite as complementary to the conventional hydrodesulfurization method. Sulfur levels of fuel samples, brought to the laboratory from typical fuel stations, were detected by a turbidimetric method before and after desulfurization. FAU zeolite sorbent, prepared from coal fly ash, was contacted with the fuel samples at stopped flow, and the residual fuels were analyzed to determine the sorbent's desulfurization performance. The process was optimized to enhance the sorbent's performance by varying the reaction conditions such as temperature, fuel volume, and the sorbent chemical composition. The results indicated that, at ambient temperature and pressure, the zeolitic desulfurization could reduce the sulfur content approximately by 40 % of its initial concentration, from 61 to 37 ppm and 155 to 97 ppm, in gasoline and diesel, respectively. Therefore, fly ash zeolites offer a possible opportunity for further desulfurization of refining petroleum fuels which may lead to economic and environmental gains.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Desulfurization of Gasoline and Diesel by Fly Ash‐Derived FAU Zeolite

Hossi,

Nkazi,

van der Merwe

et al. 2024

Chem Eng & Technol

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“…Various methods have been applied to reduce the cold start emissions of internal combustion engines. Several publications, including experimental and numerical simulations, can be found in literature (Kalam et al, 2011, Guerrero et al, 2019, Shah et al, 2011, Durat et al, 2013.…”

Section: Introductionmentioning

confidence: 99%

Soğuk Çalişma Ve Rölanti̇ Koşullarinda Ön Isitici Yükünün Ve Konumunun Katali̇ti̇k Konvertör Veri̇mli̇li̇ği̇ne Etki̇leri̇

Dinler¹,

Aktas²,

Taskin³

et al. 2021

Isı Bilimi Ve Tekniği Dergisi

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Exhaust emissions are significant pollutants that affect urban lifestyles. There are several regulations related to the exhaust emissions of both gasoline and diesel engines. In this study, the effects of a controlled heating of the exhaust line before the catalytic converter on the converter efficiency are experimentally investigated. Experiments were conducted based on either discrete or cold start conditions. For discrete conditions, the engine was operated until it reached normal and steady state operating conditions. Then, the engine was stopped until the catalytic converter surface temperature reached the ambient temperature. The experiments were first started without additional heating and then continued with different heating loads. In the second stage, the catalytic converter behavior and conversion efficiency under cold start conditions were investigated. The exhaust gas after the exhaust manifold was preheated with different heating loads for the first 150 seconds after the start of the engine; however, the exhaust line was heated 15 s before starting the engine. The effects of the location, length and heat loads of the electrical resistances on the catalytic converter behavior were investigated. After all of the experiments, it was concluded that with the appropriate location and heating loads, for discrete operating conditions, the hydrocarbon (HC) and carbon monoxide (CO) emission conversion efficiencies reached nearly 100 % after 50 s of starting the engine. For cold start conditions, the hydrocarbon (HC) and carbon monoxide (CO) emission conversion efficiencies reached 35 % and 80 %, respectively.

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“…Due to the scarcity of these metals, increasing prices and health hazards, it is a requirement to find a replacement which is less rare, less expensive, and competitively active. Over time, many pure metals and metal oxides were tested as alternatives to these PGEs for redox reactions in catalytic converters i.e., Au, Ni, Cu, MnO 2 , CoO, Co 3 O 4 and CuO [15,[17][18][19]. Co 3 O 4 over different supports was investigated as a catalyst for oxidation of CO and HC in exhaust emission control system and demonstrated low temperature activity [20,21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Zirconia on Hydrothermally Synthesized Co3O4/TiO2 Catalyst for NOx Reduction from Engine Emissions

2020

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Effect of zirconia on the 6 wt.% Co3O4/TiO2 catalyst for NOx reduction is investigated in this paper. Co3O4/TiO2 catalyst was prepared by using hydrothermal method and then was promoted with zirconia by impregnation to get 8% wt. ZrO2-Co3O4/TiO2 catalyst. Catalysts were characterized by using XRD, SEM, and TGA. Catalysts real time activity was tested by coating them on stainless steel wire meshes, containing them in a mild steel shell and mounting them at the exhaust tailpipe of a 72 cm3 motorcycle engine. Zirconia promoted catalyst showed higher conversion efficiency of NOX than the simple Co3O4/TiO2 catalyst due to small crystalline size, fouling inhibition and thermal stability.

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Copper-Exchanged Philippine Natural Zeolite as Potential Alternative to Noble Metal Catalysts in Three-Way Catalytic Converters

Cited by 8 publications

References 16 publications

Desulfurization of Gasoline and Diesel by Fly Ash‐Derived FAU Zeolite

Desulfurization of Gasoline and Diesel by Fly Ash‐Derived FAU Zeolite

Soğuk Çalişma Ve Rölanti̇ Koşullarinda Ön Isitici Yükünün Ve Konumunun Katali̇ti̇k Konvertör Veri̇mli̇li̇ği̇ne Etki̇leri̇

Effect of Zirconia on Hydrothermally Synthesized Co3O4/TiO2 Catalyst for NOx Reduction from Engine Emissions

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