Pyrolysis gas from biomass and plastics over X-Mo@MgO (X = Ni, Fe, Co) catalysts into functional carbon nanocomposite: Gas reforming reaction and proper process mechanisms

Dong, Hang; Yan, Xiangzhe; Li, Meng; Qian, Zehao; Xie, Yu; Luo, Wei; Lei, Can; Zhou, Zhi

doi:10.1016/j.scitotenv.2022.154751

Cited by 25 publications

(11 citation statements)

References 45 publications

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“…450 °C. [26] While previous research has shown that at some CO 2 concentrations the growth of MWCNTs from model gas mixtures [20,22] and mixtures of biomass with plastics [13,14] can be achieved, our data demonstrate that the CO 2 concentrations that are present in pyrolysis gas from biomass are too high to allow for the synthesis of MWCNTs with decent yields (700 °C). The removal of CO 2 is required due to competitive reactions decreasing MWCNT deposition (specifically, reactions 4-6).…”

Section: Evidence Of Co 2 Role In the Inhibited Mwcnt Growthcontrasting

confidence: 67%

“…[5][6][7][8][9][10][11][12] The mixtures of biomass (50 wt %) and PP (50 wt %) were utilized to produce pyrolysis gas for the growth of CNTs. [13,14] The setups consisted of a pyrolysis reactor, condenser for liquids and CVD reactor for catalytic synthesis of CNTs. Dong et al used a mixture of oil tea camellia shells (50 wt %) and PP (50 wt %).…”

Section: Introductionmentioning

confidence: 99%

“…Dong et al used a mixture of oil tea camellia shells (50 wt %) and PP (50 wt %). [13] The growth of CNTs was conducted over 6 XÀ Mo@MgO catalysts (X=Ni, Fe, Co, where metal content X was 10 wt % and Mo content was either 0 or 5 wt %). The feedstock was pyrolyzed followed by condensation of liquid products.…”

Section: Introductionmentioning

confidence: 99%

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Carbon Dioxide Capture from Biomass Pyrolysis Gas as an Enabling Step of Biogenic Carbon Nanotube Synthesis and Hydrogen Recovery

Veksha

Tsakadze

et al. 2023

ChemSusChem

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Utilization of renewable raw materials as feedstock defossilizes industrial manufacturing while subsequent carbon capture reduces carbon footprint. We applied this concept to design a new pyrolysis‐based process for synthesis of biogenic multi‐walled carbon nanotubes (MWCNTs) and H2 from biomass. It was demonstrated that the conversion of hydrocarbon compounds in pyrolysis gas into MWCNTs and H2 is detrimentally influenced by accompanied CO2 released from biomass decomposition. Capturing CO2 with a calcium sorbent upgraded the pyrolysis gas into a suitable gaseous precursor for downstream production of MWCNTs and H2‐rich gas. Furthermore, the results suggest that CO2 capture with the sorbent has a potential to outperform a liquid alkaline scrubber owing to avoided liquid organic waste generation, sorbent regenerability and higher H2 recovery from biomass pyrolysis gas.

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Section: Evidence Of Co 2 Role In the Inhibited Mwcnt Growthcontrasting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Carbon Dioxide Capture from Biomass Pyrolysis Gas as an Enabling Step of Biogenic Carbon Nanotube Synthesis and Hydrogen Recovery

Veksha

Tsakadze

et al. 2023

ChemSusChem

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“…Compared with recent reports (Table S2), the yield of CNMs in this work is relatively high, and the ID/IG value is also higher than that reported by Xu et al It can be found that the result of this work even exceeds the yield of CNMs obtained from pure PP and is only slightly lower than that obtained from pure plastics. , In addition, the quality of other pyrolysis products (such as pyrolysis oil) obtained in this work is also relatively high. At present, the CNMs produced from organic solid waste have been used for the adsorption of heavy metals in water and sterilization, which have all shown good results. , …”

Section: Resultsmentioning

confidence: 99%

“…At present, the CNMs produced from organic solid waste have been used for the adsorption of heavy metals in water and sterilization, which have all shown good results. 41,42 Analysis of Pyrolysis Gas Components in Catalytic and Repeated Groups. Figure 9a shows that the catalytic groups dramatically promoted the production of H 2 compared to the B group (12.71 vol %).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Catalytic Activity and Reusability of Nickel-Based Catalysts with Different Biochar Supports during Copyrolysis of Biomass and Plastic

Luo

Dong

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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Low-cost biochar is a promising catalyst support for catalytic pyrolysis to produce pyrolysis oil, pyrolysis gas, and carbon nanomaterials (CNMs). The effect of different Ni/biochar (four kinds of original biochar and three kinds of modified biochar) catalysts on the yield and properties of copyrolysis products from Chinese herb residue and reused polypropylene (PP) was studied. Results show that the modified biochar support had a high surface area and high catalytic activity. Particularly, Ni/ZC (ZnCl2-modified biochar) obtained higher yields of CNMs (2.92 wt %) and pyrolysis gas (55.44 wt %). Moreover, it exhibited high stability in repeated use experiments. Interestingly, the Ni/ZC catalyst showed the highest catalytic activity during second reuse (ZC-R2) due to moderate precoking. The high content of hydrocarbons and the C6–C20 component in the ZC-R2 group is attributed to the stronger secondary cracking capacity. The stronger secondary cracking capacity of the front-end catalyst may increase the content of CH4 in pyrolysis gas. Therefore, the Ni/ZC catalyst significantly increased the yield of a high-quality 3D graphitic carbon network structure in a second-stage reactor. This work contributes to the industrial application of catalytic pyrolysis technology by reducing the catalyst cost and increasing the product value.

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A review on catalytic pyrolysis of municipal plastic waste

Biakhmetov,

Dostiyarov,

et al. 2023

WIREs Energy & Environment

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Plastic pollution is a global issue that severely threatens the environment if not managed properly. Plastic waste is widely treated in unsustainable ways such as landfill and incineration that generally do not contribute to the circular economy or to the principles of the United Nation's sustainable development goals. Catalytic pyrolysis of plastic waste is considered an alternative solution with its potential of recovering fuels and chemicals from the plastic waste that is not recyclable. Here, we described for the first time the main steps required for running an operational pyrolysis plant from a whole system perspective. The recent advancement of plastic pyrolysis technologies is also described to guide the selection of relevant catalysts. The practical applications of products from the plastic pyrolysis are succinctly reviewed. This review will facilitate the development of the capacity to make better decisions upon the design and analysis of plastic pyrolysis processes and systems.This article is categorized under: Sustainable Energy > Bioenergy Climate and Environment > Circular Economy Emerging Technologies > Materials Sustainable Energy > Energy Efficiency

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Pyrolysis gas from biomass and plastics over X-Mo@MgO (X = Ni, Fe, Co) catalysts into functional carbon nanocomposite: Gas reforming reaction and proper process mechanisms

Cited by 25 publications

References 45 publications

Carbon Dioxide Capture from Biomass Pyrolysis Gas as an Enabling Step of Biogenic Carbon Nanotube Synthesis and Hydrogen Recovery

Carbon Dioxide Capture from Biomass Pyrolysis Gas as an Enabling Step of Biogenic Carbon Nanotube Synthesis and Hydrogen Recovery

Catalytic Activity and Reusability of Nickel-Based Catalysts with Different Biochar Supports during Copyrolysis of Biomass and Plastic

A review on catalytic pyrolysis of municipal plastic waste

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