Conversion of plastic waste into CNTs using Ni/Mo/MgO catalyst—An optimization approach by mixture experiment

Bajad, Ganesh S.; Guguloth, Venkanna; Vijayakumar, R.; Bose, Suryasarathi

doi:10.1080/1536383x.2015.1130704

Cited by 19 publications

(6 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth mentioning that for CNT NiMo/MgO , four (4) diffraction peaks typical of Mo 2 C (PDF 01-071-6028) were obtained, as shown in Figure 6D. Such peaks (Mo 2 C), as reported by many researchers [23,48,57], are instrumental in the growth of CNTs. The (100) peak, which reflects the existence of in-plane regularity and curvature within the graphene layers [58], was absent in CNT NiMo .…”

Section: Effect Of Different Supports On the Purity And Graphitization Degree Of Cntsmentioning

confidence: 60%

“…The novelty of this study lies in its presentation of first-hand information on the performance of different supported NiMo catalysts towards the growth of waste PP-derived CNTs. The NiMo catalyst was chosen because optimum loading and composition have been carefully studied by other researchers [23,24]. All four supported NiMo catalysts under study were prepared using similar Ni, Mo, and support metal loadings.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Different Catalyst Supports on the Quality, Yield and Morphology of Carbon Nanotubes Produced from Waste Polypropylene Plastics

et al. 2021

View full text Add to dashboard Cite

The role of the effect of the support on the reactivity of heterogeneous catalysts cannot be over-emphasized. Therefore, the study documented in this article investigated the effect of different metal oxide supports (MgO, CaO and TiO2) and mixed oxide supports (CaTiO3) on the performance of a bimetallic NiMo catalyst prepared via the sol–gel method during the catalytic growth of carbon nanotubes (CNTs) from waste polypropylene (PP). Waste PP was pyrolyzed at 700 °C in a single-stage chemical vapor deposition reactor and off-gas was utilized in-situ as a cheap carbon feedstock for the growth of CNTs under similar conditions for all the prepared NiMo catalysts (supported and unsupported). The structures of the prepared catalysts and deposited carbon were extensively characterized using X-ray diffraction (XRD), temperature-programmed reduction (TPR), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), etc. The catalytic performance of NiMo supported and unsupported catalysts was evaluated in terms of the yield, purity, and morphology of synthesized CNTs. The results revealed that the stabilizing role of supports is fundamental in preventing nanoparticle agglomeration and aggregation, thereby resulting in improved yield and quality of CNTs. Supported NiMo catalysts produced better aligned graphitic and high-quality CNTs. The NiMo/CaTiO3 catalyst produced the highest carbon of 40.0%, while unsupported NiMo produced low-quality CNTs with the lowest carbon yield of 18.4%. Therefore, the type of catalyst support and overall stability of catalytic materials play significant roles in the yield and quality of CNTs produced from waste PP.

show abstract

Section: Effect Of Different Supports On the Purity And Graphitization Degree Of Cntsmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Effect of Different Catalyst Supports on the Quality, Yield and Morphology of Carbon Nanotubes Produced from Waste Polypropylene Plastics

et al. 2021

View full text Add to dashboard Cite

show abstract

“…As a lightweight, waterproof, and corrosion resistant material, plastic is widely used in almost every aspect of human society, contributing considerably to the economic growth and social sustainability [ 1 ]. However, the consistent increase in the accumulation of discarded plastics causes serious pollution to the environment due to their non-biodegradable nature under ambient conditions [ 2 , 3 , 4 ]. Currently, landfill and incineration are mainly used to dispose plastic waste, but they are becoming less and less acceptable due to their many demerits, e.g., waste of land and secondary pollution [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Preparation of Carbon Nanotubes from Waste Polyethylene Using FeNi Bimetallic Nanocatalyst

Zhang

Zheng

et al. 2020

Nanomaterials

View full text Add to dashboard Cite

In this work, carbon nanotubes (CNTs) were synthesized by catalytic pyrolysis from waste polyethylene in Ar using an in-situ catalyst derived from ferric nitrate and nickel nitrate precursors. The influence factors (such as temperature, catalyst content and Fe/Ni molar ratio) on the formation of CNTs were investigated. The results showed that with the temperature increasing from 773 to 1073 K, the carbon yield gradually increased whereas the aspect (length-diameter) ratio of CNTs initially increased and then decreased. The optimal growth temperature of CNTs was 973 K. With increasing the Fe/Ni molar ratio in an FeNi bimetallic catalyst, the yield of CNTs gradually increased, whereas their aspect ratio first increased and then decreased. The optimal usage of the catalyst precursor (Fe/Ni molar ratio was 5:5) was 0.50 wt% with respect to the mass of polyethylene. In this case, the yield of CNTs reached as high as 20 wt%, and their diameter and length were respectively 20–30 nm, and a few tens of micrometers. The simple low-cost method developed in this work could be used to address the environmental concerns about plastic waste, and synthesize high value-added CNTs for a range of future applications.

show abstract

“…3 Therefore, a large number of methods have been investigated to convert plastic wastes into useful products. 4 For instance, they have been transformed into different kinds of carbon-based nanostructures including nanotubes, 5 spheres, 6 hollow spheres, 7 nanosheets, 8 activated carbons, 9 and graphene flake/foil 10 for sustainable energy applications. 11…”

Section: Introductionmentioning

confidence: 99%

Simple Preparation of Porous Carbon-Supported Ruthenium: Propitious Catalytic Activity in the Reduction of Ferrocyanate(III) and a Cationic Dye

et al. 2018

View full text Add to dashboard Cite

The present study involves the synthesis, characterization, and catalytic application of ruthenium nanoparticles (Ru NPs) supported on plastic-derived carbons (PDCs) synthesized from plastic wastes (soft drink bottles) as an alternative carbon source. PDCs have been further activated with CO 2 and characterized by various analytical techniques. The catalytic activity of Ru@PDC for the reduction of potassium hexacyanoferrate(III), (K 3 [Fe(CN) 6 ]), and new fuchsin (NF) dye by NaBH 4 was performed under mild conditions. The PDCs had spherical morphology with an average size of 0.5 μm, and the Ru NP (5 ± 0.2 nm) loading (4.01 wt %) into the PDC provided high catalytic performance for catalytic reduction of ferrocyanate(III) and NF dye. This catalyst can be recycled more than six times with only a minor loss of its catalytic activity. In addition, the stability and reusability of the Ru@PDC catalyst are also discussed.

show abstract

Conversion of plastic waste into CNTs using Ni/Mo/MgO catalyst—An optimization approach by mixture experiment

Cited by 19 publications

References 41 publications

Effect of Different Catalyst Supports on the Quality, Yield and Morphology of Carbon Nanotubes Produced from Waste Polypropylene Plastics

Effect of Different Catalyst Supports on the Quality, Yield and Morphology of Carbon Nanotubes Produced from Waste Polypropylene Plastics

Catalytic Preparation of Carbon Nanotubes from Waste Polyethylene Using FeNi Bimetallic Nanocatalyst

Simple Preparation of Porous Carbon-Supported Ruthenium: Propitious Catalytic Activity in the Reduction of Ferrocyanate(III) and a Cationic Dye

Contact Info

Product

Resources

About