Synergistic effects in steam gasification of combined biomass and plastic waste mixtures

Burra, Kiran Raj Goud; Gupta, Ashwani K.

doi:10.1016/j.apenergy.2017.10.130

Cited by 198 publications

(57 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Compared with pure cellulose, transition metals in biomass may be the main reason for the better catalytic pyrolysis of biomass than cellulose. The presence of transition metals can further promote the pyrolysis of polyolefins and produce smaller molecular weight organic compounds . Ni/HZ catalyst obviously promoted the formation of hydrocarbon, the relative peak area of which reached 73.92%, 88.48%, and 98.47%, respectively, and increased by 11.58%, 6.74%, and 11.37%, respectively.…”

Section: Resultssupporting

confidence: 84%

Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

et al. 2020

View full text Add to dashboard Cite

The present work aims to investigate the thermal behavior, kinetics, thermodynamics, and product distribution during copyrolysis of transition metal salt (Ni, Co, Zn, Cu, and Fe)-added biomass and model compounds with low density polyethylene(LDPE) over a Ni-based HZSM-5 catalyst by TGA and fixed bed reactor. The interactions and reaction mechanisms during copyrolysis were evaluated. The influence of Ni-impregnated biomass (C-M) and Nimodified HZSM-5 (Ni/HZ) on the formation of pyrolysis bio-oil from biomass and model compounds and its subsequent effect on catalytic pyrolysis vapor upgrading was discussed. The results indicated that the presence of transition metal decreased the thermal degradation temperature and thermodynamics parameters; maximum decomposition rate, and reaction complexity. Ni/HZ catalyst could further decrease the activation energy, accelerate the reaction rate and change reaction process, and the modified samples/LDPE under copyrolysis with HZSM-5 catalyst presented a more significant effect than Ni/HZ catalyst. Subsequently, the Ea of pine, cellulose and lignin changed from 24.11, 18.29, and 28.68 kJ/mol (CP@Ni/HZ) to 56.04, 69.84, and 16.21 kJ/mol (CP-Ni@HZSM-5), respectively. In addition, Ni could inhibit the depolymerization of cellulose and promoted the formation of char, coke, and lignin derived phenolics. And Ni-impregnated biomass reduced the formation of desired aromatic hydrocarbons, but result in increasing of the char and non-condensable gases. But Ni/HZ catalysts promote the conversion of biomass to target products.

show abstract

Section: Resultssupporting

confidence: 84%

Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Highly oxygenated bonding was responsible for one stage degradation of polyesters [46]. The structural breakdown of recycled polyester fabric has started about 385 • C and the maximum weight loss has occurred at 436.5 • C. About 70% of the weight loss has completed at 440 • C. This data is in correspondence with the TGA data given for thermoplastic decomposition [28,47]. The residual weight during thermal decomposition of recycled polyester has found to be negligible indicating occurrence of stronger reactions compared to degradation of biomass during decomposition [48].…”

Section: Discussionsupporting

confidence: 81%

“…The weighted conversion rate for recycled polyester revealed a decrease in the peak of pyrolysis expected between 375 • C and 480 • C, a decrease in the manure pyrolysis peak at around 350 • C. This finding has supported the presence of synergistic interaction on the solid phase causing loss in weight. Benzyl radicals of plastic materials as discussed earlier interacted with the biomass volatiles created such synergy which also enhanced the carbon conversion efficiency [28]. The increase in the heating rates has shifted the maximum peak temperatures to the higher values without changing thermal profiles during co-firing.…”

Section: Discussionmentioning

confidence: 84%

“…During co-pyrolysis, thermoplastic materials has melted without changing their chemical composition before the structural decomposition [28]. This has resulted in good mixing of recycled polyester with cattle manure during pyrolysis.…”

Section: Discussionmentioning

confidence: 99%

“…Synergistic effects of biomass-plastics co-pyrolysis have also resulted in non-additive increase in syngas yields. Non-additive enhancement of carbon conversion yield, syngas, and bio-oil quality make co-pyrolysis a favorable route for sustainable development of the biomass energy industry [28,29].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sustainable Valorization of Animal Manure and Recycled Polyester: Co-pyrolysis Synergy

Akyürek

2019

Sustainability

View full text Add to dashboard Cite

In this study sustainable valorization of cattle manure, recycled polyester, and their blend (1:1 wt.%) were examined by the thermogravimetric analysis (TGA) method. Pyrolysis tests were performed at 10, 30, and 50 °C/min heating rate from room temperature to 1000 °C under a nitrogen environment with a flow of 100 cm3/min. Kinetics of decomposition were analyzed by using Flynn–Wall–Ozawa (FWO) method. Based on activation energies and conversion points, a single region was established for recycled polyester while three regions of pyrolysis were obtained for cattle manure and their blend. Comparison between experimental and theoretical profiles indicated synergistic interactions during co-pyrolysis in the high temperature region. The apparent activation energies calculated by FWO method for cattle manure, recycled polyester. and their blend were 194.62, 254.22 and 227.21 kJ/mol, respectively. Kinetics and thermodynamic parameters, including E, ΔH, ΔG, and ΔS, have shown that cattle manure and recycled polyester blend is a remarkable feedstock for bioenergy.

show abstract

Syngas production from polyolefins in a semi‐batch reactor system

2021

View full text Add to dashboard Cite

We investigate syngas production from polyolefins commonly found in solid waste in a semi‐batch reactor system via gasification and catalytic reforming. We find that the gasification behavior of polymer waste is correlated to the energy of the weakest CH bond in the polymer structure. Furthermore, we show that the syngas yield can be enhanced by the use of adsorbents and reforming catalysts, which promote gasification and reforming over pyrolysis reactions. Adsorbents are required for the achievement of high syngas yields when the polymer feed is comprised of polymers that pyrolyze at lower temperatures, such as PS, PP, and LDPE, resulting in carbon loss as light hydrocarbons. Adsorbents trap these light gases and release them at a higher temperature, where reforming over a Ni/Al2O3 catalyst can take place. This behavior also results in synergistic effects when blends of polymers are gasified. The Ni/Al2O3 catalyst is stable over multiple recycle reactor runs.

show abstract

Synergistic effects in steam gasification of combined biomass and plastic waste mixtures

Cited by 198 publications

References 38 publications

Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

Sustainable Valorization of Animal Manure and Recycled Polyester: Co-pyrolysis Synergy

Syngas production from polyolefins in a semi‐batch reactor system

Contact Info

Product

Resources

About