Preparation of carbon nanofibers/tubes using waste tyres pyrolysis oil and coal fly ash derived catalyst

Rambau, Khavharendwe M.; Musyoka, Nicholas M.; Manyala, Ncholu I.; Ren, Jianwei; Langmi, Henrietta W.; Mathe, Mkhulu

doi:10.1080/10934529.2018.1474594

Cited by 17 publications

(8 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Presently, the topmost global concern is recycling the existing waste materials discarded from home, industries, and vehicles that significantly increases to many-fold with time. The successful utilization of waste material by fabrications/isolations of newer material has always fallen under the category of a sustainable approach. Various studies based on the fabrication of carbon nanomaterials are available in the literature, which displayed the utilization of biowaste − and biomasses. − In continuation, few reports favor the use of dirty, dangerous black carbon (BC) pollutant soot for the isolation of nanocarbons, to explore its positive perspectives − besides its well-known negative impacts. , Sahu et al isolated nanocarbon from diesel soot and synthesized core–shell carbon/MnO 2 super capacitive energy storage nanocomposites .…”

Section: Introductionmentioning

confidence: 99%

Pollutant Diesel Soot Derived Onion-like Nanocarbons for the Adsorption of Organic Dyes and Environmental Assessment of Treated Wastewater

Gunture

Kaushik

Garg

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The presented finding offers a sustainable approach for the successful utilization of the pollutant soot in the form of waste black carbon (BC), collected from the exhausts of a diesel engine as an efficient adsorbent. The morphology of the as-isolated diesel particulate soot was observed in nanosize consisting of an Onion like Nano-Carbon (ONC) structure. The ONC were transformed into water-soluble Onion like Nano-Carbon (wsONC) via the simplest method of oxidation. For applicability as an adsorbent, wsONC was used for the removal of three cationic organic dyes, methylene blue (MB), crystal violet (CV), and rhodamine B (RhB). Among the three cationic dyes, MB showed significant results compared with the other two. A small amount of wsONC was found to be capable of removing ∼100 mg L–1 of MB within the time of ∼60 min. While with CV and RhB, the removal efficiency was observed to be ∼60 mg L–1 and ∼40 mg L–1, respectively. In a comparative adsorption analysis, the performance of wsONC was ∼2.5 times higher than the as isolated ONC. Another novelty associated with the present finding is the uses of the treated wastewater for watering the Triticum aestivum (wheat) and Cicer arietinum (gram) plants for the initial 15 days. Compared to the dye water, the treated wastewater plants showed healthy growth.

show abstract

Section: Introductionmentioning

confidence: 99%

Pollutant Diesel Soot Derived Onion-like Nanocarbons for the Adsorption of Organic Dyes and Environmental Assessment of Treated Wastewater

Gunture

Kaushik

Garg

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Typical FCC catalysts consist of zeolite and clay with some binders and impurities. [2,[5][6][7][8][9][10][11] Ultrastable Y-zeolite [12] is the active phase in FCC catalysts. USY is Y zeolite that has been exposed to relatively mild hydrothermal treatment under control conditions in order to enhance its stability and avoid structure collapse during the regeneration stage of the FCC process.…”

Section: Introductionmentioning

confidence: 99%

Fine structural changes of fluid catalytic catalysts and characterization of coke formed resulting from heavy oil devolatilization

Zhang

Owen

et al. 2020

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

Coke formation from heavy oil cracking and the associated change in the porous structure of fluid catalytic cracking (FCC) catalysts has been studied using a comprehensive range of techniques, including 2D and 3D imaging and carbon/coke characterization techniques. The carbon/coke formed from heavy oil devolatilization has been investigated with a range of oilto-FCC catalyst ratios (1:3, 1:2, 1:1, 2:1 and 3:1) to simulate the ageing of FCC catalysts in an operating oil refinery. Carbon/coke was formed on all used FCC catalyst samples and was found to generally increase in quantity with the increasing oil-to-FCC catalyst ratios. Coke formation has been correlated with the observed porosity change of the FCC catalyst. Higher quantities of carbon/coke formed on the FCC catalyst due to higher oil-to-FCC catalyst ratios (simulated increase in time on-stream) leads to a decrease of total pore volume and surface area. X-Ray computed tomography (X-Ray CT) studies allowed 3-dimensional imaging of used catalyst particles and showed that the zeolite component of the FCC catalyst remains evenly distributed throughout the FCC particle from the centre to the exterior for pristine and used FCC catalyst particles. This technique showed that while the interior porous structure of the FCC catalyst particle is not affected by the coking, the exterior porous structure is substantially modified for all used FCC catalyst samples. This process of pore collapse and/or clogging at the surface of the particles is likely to have a significant effect on the deactivation of FCC catalysts that is commonly observed. The deeper insight into this process gained through this study is important for understanding how FCC catalysts change with time-onstream and eventually deactivate and may allow for future catalysts to be developed that are more resistant to deactivation.

show abstract

“…Co-processing increased the aromatics and oxygen-containing compounds in the liquid product. However, previous studies were largely focused on fly ash or fly ash-derived catalysts [20][21][22][23], and limited studies have been carried out to investigate the catalytic effects of different ash deposits (collected from various parts of a coal-fired power station) on LLDPE pyrolysis. This study explores the catalytic influence of different mineral assemblage associated with different ash deposits owing to different formation processes and conditions [24][25][26].…”

Section: May 2019mentioning

confidence: 99%

Catalytic pyrolysis of linear low-density polyethylene using recycled coal ash: Kinetic study and environmental evaluation

Lai

Meng

Yan

et al. 2021

Korean J. Chem. Eng.

View full text Add to dashboard Cite

Catalytic pyrolysis offers a sustainable route to convert plastic wastes into fuel. We investigated the catalytic performance of coal ash (fly and bottom ash) at blending ratio of 5 wt%, and 15 wt% during pyrolysis of linear lowdensity polyethylene (LLDPE). The influence on activation energy and oil was characterized via thermogravimetric analyzer (TGA) and gas chromatography-mass spectrometry (GC-MS). Results have shown that 15 wt% bottom ash exhibited higher catalytic activity. The activation energy estimated by Coats-Redfern method decreased from 458.7 kJ•mol  1 to 437.8 kJ•mol  1 , while the alicyclic hydrocarbon yield increased from 5.97% to 32.09%. This implies that CaO, which is abundant in bottom ash, could promote the conversion of LLDPE. Furthermore, a cradle-to-factory gate life cycle assessment was performed to investigate three scenarios (non-catalytic pyrolysis, 15 wt% fly ash, and 15 wt% bottom ash) of LLDPE conversion strategies via a normalization and weighting approach. It was found that LLDPE pyrolysis with 15 wt% bottom ash also showed the lowest normalized score of 2.83, implying the lowest environmental impact. This work has demonstrated that the recycling of coal ash, particularly bottom ash, as catalysts for LLDPE pyrolysis is effective.

show abstract

Preparation of carbon nanofibers/tubes using waste tyres pyrolysis oil and coal fly ash derived catalyst

Cited by 17 publications

References 57 publications

Pollutant Diesel Soot Derived Onion-like Nanocarbons for the Adsorption of Organic Dyes and Environmental Assessment of Treated Wastewater

Pollutant Diesel Soot Derived Onion-like Nanocarbons for the Adsorption of Organic Dyes and Environmental Assessment of Treated Wastewater

Fine structural changes of fluid catalytic catalysts and characterization of coke formed resulting from heavy oil devolatilization

Catalytic pyrolysis of linear low-density polyethylene using recycled coal ash: Kinetic study and environmental evaluation

Contact Info

Product

Resources

About