A novel method of unburned hydrocarbons and NO<sub>x</sub>gases capture from vehicular exhaust using natural biosorbent

Kannan, R. Sayee; Kalyanasundharam, Sruthi; Ravichandran, Nandini; Subramanian, Thiyagarajan; Thilagaraj, Wilson Richard

doi:10.1080/01496395.2017.1380046

Cited by 11 publications

(4 citation statements)

References 20 publications

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“…Moringa oleifera pods and calcium alginate, it showed significant reduction in the emission of gas exhaust from vehicles [198]. The sorption ability was 15 and 124 mg/g for hydrocarbons and nitrogen oxides, respectively.…”

Section: Radhakrishnan Et Al Developed Natural Absorbents By Crosslin...mentioning

confidence: 94%

Review on Recent Developments in Bioinspired-Materials for Sustainable Energy and Environmental Applications

et al. 2022

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Nature has always inspired innovative minds for development of new designs. Animals and plants provide various structures with lower density, more strength and high energy sorption abilities that can incite the development of new designs with significant properties. By observing the important functions of biological structures found in nature, scientists have fabricated structures by bio-inspiration that have been proved to exhibit a significant improvement over traditional structures for their applications in the environmental and energy sector. Bio-fabricated materials have shown many advantages due to their easy synthesis, flexible nature, high performance and multiple functions as these can be used in light harvesting systems, batteries, biofuels, catalysis, purification of water, air and environmental monitoring. However, there is an urgent need for sensitive fabrication instruments that can synthesize bio-inspired structures and convert laboratory scale synthesis into large scale production. The present review highlights recent advances in synthesis of bio-inspired materials and use of hierarchical nanomaterials generated through biomolecular self-assembly for their use in removal of environmental contaminants and sustainable development.

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Section: Radhakrishnan Et Al Developed Natural Absorbents By Crosslin...mentioning

confidence: 94%

Review on Recent Developments in Bioinspired-Materials for Sustainable Energy and Environmental Applications

et al. 2022

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“…Aside from the carbon anhydrase enzyme, biomolecular selfassembly stands out as another noteworthy approach in the creation of CO 2 capturing materials for air purification. A study conducted by Thilagaraj et al [222] focused on crafting natural absorbents through the interconnectedness of Moringa oleifera pods and calcium alginate. This innovative approach demonstrated a remarkable reduction in vehicular gas emissions.…”

Section: Bio-inspired Adsorbents and Filtersmentioning

confidence: 99%

“…A study conducted by Thilagaraj et al. [ 222 ] focused on crafting natural absorbents through the interconnectedness of Moringa oleifera pods and calcium alginate. This innovative approach demonstrated a remarkable reduction in vehicular gas emissions.…”

Section: Bio‐inspired Functional Materials For Air Purificationmentioning

confidence: 99%

Bio‐Inspired Functional Materials for Environmental Applications

Ede,

Yu,

Sung

et al. 2023

Small Methods

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With the global population expected to reach 9.7 billion by 2050, there is an urgent need for advanced materials that can address existing and developing environmental issues. Many current synthesis processes are environmentally unfriendly and often lack control over size, shape, and phase of resulting materials. Based on knowledge from biological synthesis and assembly processes, as well as their resulting functions (e.g., photosynthesis, self‐healing, anti‐fouling, etc.), researchers are now beginning to leverage these biological blueprints to advance bio‐inspired pathways for functional materials for water treatment, air purification and sensing. The result has been the development of novel materials that demonstrate enhanced performance and address sustainability. Here, an overview of the progress and potential of bio‐inspired methods toward functional materials for environmental applications is provided. The challenges and opportunities for this rapidly expanding field and aim to provide a valuable resource for researchers and engineers interested in developing sustainable and efficient processes and technologies is discussed.

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“…Selective catalytic reduction (SCR) is one of the most convenient ways to ensure efficient NO x reduction with a reducing agent. − Common widely used reducing agents for SCR technology include ammonia (NH 3 ), hydrogen (H 2 ), or urea (CO(NH 2 ) 2 ). − Despite achieving high removal efficiency with the above agents, the additional requirement of storage for the reducing agent and the necessity of expensive H 2 gas make them unfavorable for practical aspects . The use of hydrocarbons (HCs) as reducing agents is an essential improvement over conventional SCR; diesel fuels majorly consist of hydrocarbons (dodecane), and the exhaust gas already contains several unburnt HCs. − Thus, HC-SCR is a cost-effective and promising approach for practical NO x reduction techniques providing adequate removal efficiency at high operating temperatures . However, it performs poorly at low-temperature ranges; lower temperatures of diesel exhaust gas are preferred due to the less energy waste and high energy efficiency gain.…”

Section: Introductionmentioning

confidence: 99%

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures

Denra

Matyakubov

Saud

et al. 2023

Ind. Eng. Chem. Res.

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The high removal efficiency of NO x from diesel engine exhaust gas at low temperatures remains challenging due to the poor activity of catalysts under this condition. This work investigated the effectiveness of gliding arc plasma in the NO x removal over the Ag/γ-Al 2 O 3 catalyst with n-heptane as a reducing agent source for NO x reduction. The plasma conjugated with the catalyst was performed like an injection method, i.e., a small part flow (1/26) that consisted of n-heptane was reformed to H 2 and oxygenated hydrocarbons (OHCs) by gliding arc plasma before mixing it with the gas containing NO x . Then, the overall gas was passed through the catalyst stage at various temperatures from 127 to 253 °C. The experimental data revealed that NO x removal efficiency significantly increased with plasma treatment. The enhancement by plasma treatment increased with temperature from 127 to 226 °C, but the enhancement reduced at a temperature of 253 °C. The result came from formation of H 2 and OHCs in the treated plasma gas, which reactivated NO x removal over the catalyst at low temperatures. Moreover, the enhanced NO x removal efficiency in a wide low-temperature range is obtained due to considerable hydrogen formation by the gliding arc plasma. To sum up, the highest NO x removal efficiency was 68.5% under a temperature of 226 °C and specific energy input of 34.6 J/L, while it was 20.3% for the catalyst alone; in other words, the removal efficiency increased by 48.1% with using plasma under these conditions. Owing to its low energy consumption, high-throughput gas treatment, and effectiveness at low temperatures, the technology is promising in practical applications for refining diesel exhaust gases.

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A novel method of unburned hydrocarbons and NO_xgases capture from vehicular exhaust using natural biosorbent

Cited by 11 publications

References 20 publications

Review on Recent Developments in Bioinspired-Materials for Sustainable Energy and Environmental Applications

Review on Recent Developments in Bioinspired-Materials for Sustainable Energy and Environmental Applications

Bio‐Inspired Functional Materials for Environmental Applications

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures

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A novel method of unburned hydrocarbons and NOxgases capture from vehicular exhaust using natural biosorbent

Cited by 11 publications

References 20 publications

Review on Recent Developments in Bioinspired-Materials for Sustainable Energy and Environmental Applications

Review on Recent Developments in Bioinspired-Materials for Sustainable Energy and Environmental Applications

Bio‐Inspired Functional Materials for Environmental Applications

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NOxat Low Temperatures

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Product

Resources

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A novel method of unburned hydrocarbons and NO_xgases capture from vehicular exhaust using natural biosorbent

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures