Precise casting of biomorphic La0.9K0.1CoO3 catalysts derived from pinewood for diesel soot combustion

Liu, Zhaohui; Wang, Xiaofei; Mao, Teng; Sima, Jinqiang; Gong, Cairong; Fan, Guoliang

doi:10.1039/c6ra12640e

Cited by 7 publications

(10 citation statements)

References 34 publications

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“…For oxygen-only mixtures, the O 2 content varies from 21% as in air ,,,,, to 2.5% in an inert gas . The most common mixture is 5% O 2 in an inert gas, ,− ,,,, but concentrations up to 10% O 2 are also popular. ,,,, Similarly, for the O 2 + NO mixtures, the oxygen concentration is typically set between 3 and 10%, with the NO concentration between 400 and 3000 ppm. ,,,,,− ,,,,,,,, More recently, the effect of SO 2 presence was also investigated.…”

Section: Introductionmentioning

confidence: 99%

“…For oxygen-only mixtures, the O 2 content varies from 21% as in air 21,25,29,33,54,73 to 2.5% in an inert gas. 74 The most common mixture is 5% O 2 in an inert gas, 34,[42][43][44]47,48,53,64 but concentrations up to 10% O 2 are also popular.…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, they are based on the specific extent of soot conversion. T 5 temperature of 5% soot conversion T 10 temperature of 10% soot conversion. ,,,,, T 50 temperature of 50% soot conversion. ,,,,,,− ,,, T 90 temperature of 90% soot conversion. − ,, …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Catalytic Soot Combustion─General Concepts and Alkali Promotion

Legutko

Stelmachowski

et al. 2023

ACS Catal.

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In this Review, we discuss catalytic systems for soot combustion. The focus is on alkali-containing materials since they exhibit the most promising and platinum group metal (PGM) free solutions, providing highly efficient catalysts at a low price. The wide range of experimental conditions used for catalyst evaluation and parameters commonly used to compare different materials was scrutinized. The presented synthetic summary of the classical and long-researched materials reveals that the most active catalysts, which may fulfill the low-temperature activity apart from PGM-based systems, are only those containing alkalis as beneficial dopants. The alkali promotion by surface doping or nanostructuration of earth abundant transition metal oxides emerged as an effective way to develop effective soot oxidation catalytic materials; therefore, the physical nature of alkali promotion is thoroughly discussed. A detailed presentation of the state of the art three-dimensional macroporous materials is presented, as these catalysts combine beneficial catalytic activity with morphological features designed for enhancing the contact between the catalyst and the soot particles. Finally, a set of reactivity descriptors for the alkali-promoted catalysts (work function, alkali desorption energy, and oxygen availability) was proposed to foster the rational design of catalytic materials for soot oxidation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Catalytic Soot Combustion─General Concepts and Alkali Promotion

Legutko

Stelmachowski

et al. 2023

ACS Catal.

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“…Perovskite-type catalysts are of great interest due to their promising properties, La 0.9 K 0,1 CoO 3 in particular. Liu et al [168] developed La 0.9 K 0,1 CoO 3 catalysts from pinewood, with a high porosity and surface area (total pore volume of 0.050-0.101 cm 3 /g and BET surface area of 84.09-147.97 m 2 /g depending on the treatment of wood, respectively), that reduced soot combustion temperature to 340 • C. To test the catalytic activity of the product, a catalyst: soot solution with a mass ratio of 20:1 was analyzed by a thermal gravimetric analyzer. The result of this analysis showed that the temperature at which 10% of carbon was oxidized was reduced by 59 • C, which confirmed the potential use of La 0.9 K 0,1 CoO 3 catalysts in reducing soot combustion emissions.…”

Section: D) Other Reactionsmentioning

confidence: 99%

Bio-Templating: An Emerging Synthetic Technique for Catalysts. A Review

et al. 2021

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In the last few years, researchers have focused their attention on the synthesis of new catalyst structures based on or inspired by nature. Biotemplating involves the transfer of biological structures to inorganic materials through artificial mineralization processes. This approach offers the main advantage of allowing morphological control of the product, as a template with the desired morphology can be pre-determined, as long as it is found in nature. This way, natural evolution through millions of years can provide us with new synthetic pathways to develop some novel functional materials with advantageous properties, such as sophistication, miniaturization, hybridization, hierarchical organization, resistance, and adaptability to the required need. The field of application of these materials is very wide, covering nanomedicine, energy capture and storage, sensors, biocompatible materials, adsorbents, and catalysis. In the latter case, bio-inspired materials can be applied as catalysts requiring different types of active sites (i.e., redox, acidic, basic sites, or a combination of them) to a wide range of processes, including conventional thermal catalysis, photocatalysis, or electrocatalysis, among others. This review aims to cover current experimental studies in the field of biotemplating materials synthesis and their characterization, focusing on their application in heterogeneous catalysis.

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“…23,24 Even though the specific surface area of original wood fiber is less than 1 m 2 /g, the catalytic materials with wide pore size distribution and high specific surface area can be prepared taking wood as template. 25 Ming Zhou et al prepared biomorphic porous zinc oxide with wood fiber as template, which proved the specie of wood template and sintering temperature played vital roles in the pore size distribution, specific surface area, and pore volume of the product. 26 Our previous studies showed that La 0.8 Ce 0.2 Fe 0.3 Co 0.7 O 3 can achieve the four-way purification of PM, NO x , CO and HC emitted by automobile exhausts, and the purification efficiency are 95%, 92%, 100%, and 94%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Preparation of biomorphic porous La_0.8Ce_0.2Fe_0.3Co_0.7O₃ perovskite‐type catalysts for automobile exhaust purification

Guo

Wang

Zhang

et al. 2023

Env Prog and Sustain Energy

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Biomorphic porous La0.8Ce0.2Fe0.3Co0.7O3 perovskite‐type catalysts are synthesized through a facile bio‐templating method taking wood fiber as template for achieving the four‐way purification of PM, NOx, CO, and HC emitted by automobile exhausts. The catalyst samples were characterized by X‐ray diffractometer, Fourier‐transform infrared spectroscopy, scanning electron microscope and Brunauer–Emmett–Teller analysis. The results showed that catalyst sample calcined at 700°C obtained high purity, high surface area (4.01 m2/g), wide pore size distribution and retained the initial wood fiber structure, which was suitable for purifying automobile exhausts. In addition, the performances for four‐way purification under the simulated exhaust were analyzed by simulation test bench. The highest purification efficiency of PM, NOx, HC, and CO can reach 92%, 92%, 98%, and 76%, separately. Moreover, four‐way purification mechanism was deduced according to the theoretical research of Mars‐van krevelen on the redox reaction mechanism and experimental result.

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Precise casting of biomorphic La_0.9K_0.1CoO₃ catalysts derived from pinewood for diesel soot combustion

Abstract: A biomorphic perovskite-type oxide, possessing a large surface area, was successfully fabricated using pinewood as a template. The porous structure prompted catalytic activity towards soot combustion under low temperature.

Cited by 7 publications

References 34 publications

Catalytic Soot Combustion─General Concepts and Alkali Promotion

Catalytic Soot Combustion─General Concepts and Alkali Promotion

Bio-Templating: An Emerging Synthetic Technique for Catalysts. A Review

Preparation of biomorphic porous La_0.8Ce_0.2Fe_0.3Co_0.7O₃ perovskite‐type catalysts for automobile exhaust purification

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Precise casting of biomorphic La0.9K0.1CoO3 catalysts derived from pinewood for diesel soot combustion

Abstract: A biomorphic perovskite-type oxide, possessing a large surface area, was successfully fabricated using pinewood as a template. The porous structure prompted catalytic activity towards soot combustion under low temperature.

Cited by 7 publications

References 34 publications

Catalytic Soot Combustion─General Concepts and Alkali Promotion

Catalytic Soot Combustion─General Concepts and Alkali Promotion

Bio-Templating: An Emerging Synthetic Technique for Catalysts. A Review

Preparation of biomorphic porous La0.8Ce0.2Fe0.3Co0.7O3 perovskite‐type catalysts for automobile exhaust purification

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Product

Resources

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Precise casting of biomorphic La_0.9K_0.1CoO₃ catalysts derived from pinewood for diesel soot combustion

Preparation of biomorphic porous La_0.8Ce_0.2Fe_0.3Co_0.7O₃ perovskite‐type catalysts for automobile exhaust purification