Co-pyrolysis of Chinese herb residue and polypropylene over Ni, Fe, Co and Cu/AC: Co-production and formation mechanism of carbon nanomaterials, liquid oil and pyrolysis gas

Wei Luo, Hang Dong, Tao Wang, Siyan Zhang, Dongyu Zhang, Bo Li, Sheng Huang, Jian Hu, Min Song and Zhi Zhou

Energy, 2022, vol. 244, issue PA

Abstract: The preparation of high-value fuels and carbon nanomaterials (CNMs) by co-pyrolysis of Chinese herb residue (CHR) and polypropylene (PP) is conducive to the improvement of environment and energy problems. The effect of monometallic (Ni, Fe, Co, Cu) and bimetallic (Ni/Fe, Ni/Co, Ni/Cu) loaded on activated carbon (AC) catalysts on the pyrolysis products was investigated in a two-stage fixed bed. The results showed that the synergistic effect of bimetals improved the quality of pyrolysis products. In particular, NiCo/AC significantly promoted the removal of F and improved the quality of liquid oil. Moreover, the content of over C20 in the Ni/Co group was the lowest, indicating that the secondary cracking of macromolecules was promoted. NiCo/AC also improved the yield and quality of pyrolysis gas. The content of H2 in Ni/Co group increased to 27.82%. In addition, Ni/Co group had the highest yield (more than 4 times that of blank group) and quality (ID/IG = 1.019) of CNMs. The pyrolysis gas obtained from different front-end catalytic has a great influence on the formation of back-end CNMs. The high CH4 promoted the formation of CNMs. A unique 3D graphitic carbon (GC) network was finally formed in high temperature.

Keywords: Catalytic co-pyrolysis; Chinese herb residue; Reused polypropylene; Biofuels; Carbon nanomaterials (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:244:y:2022:i:pa:s0360544221028838

DOI: 10.1016/j.energy.2021.122634

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