Kinetics of catalytic biomass pyrolysis using Ni-based functional materials

Hu, Yang; Ji, Guozhao; Clough, Peter T.; Xu, Xiaoyin; Zhao, Ming

doi:10.1016/j.fuproc.2019.106145

Cited by 43 publications

(14 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The 1:1 ratio allows to observe the effect of the catalyst in kinetic studies, but it must be varied for applications in pilot-scale reactors. Thus, following previous methodologies of catalytic pyrolysis [6,22], in this study, we used a biomass/catalyst ratio of 1:1 to clearly observe the effect of the catalyst at a lab-scale. Figure 2 shows the DTG curves obtained during the pyrolysis and combustion of both biomass and biomass/catalyst 1:1.…”

Section: Tg Analysismentioning

confidence: 99%

“…In addition, in the atmosphere of non-catalytic pyrolysis (Figure 6a), an increase in the H 2 profile can be observed and only occurs at temperatures above 600 • C. On the other hand, for the biomass/catalyst sample, two peaks of H 2 at 300 and 550 • C are observed, accompanied by a CO peak. Yang et al [22] studied the catalytic pyrolysis of sawdust and straw on Ni-CaO-Ca 2 SiO 4 catalyst and observed only one H 2 peak at 400 • C. Therefore, our Rh-Pt/CeO 2 -SiO 2 catalyst is showing itself able to promote reforming reactions between the water released in both, dehydration and degradation stages, and the C 2 + and C 3 + compounds, leading to a release of CO and H 2 [33]. This is confirmed by the decrease in the intensity of C 2 + and C 3 + ions and the spectra obtained in Section 2.3 (Figure 3a and Table 3), and by the observed in Figure 5a, where the H 2 O intensity is lower for the catalytic pyrolysis and is more revealing that the signal observed in TG-FTIR ( Figure 3b).…”

Section: Speciesmentioning

confidence: 99%

“…However, for catalytic processes, the kinetic parameters have been only obtained by model free methods. For instance, Yang et al [22] evaluated the effect of the multifunctional Ni-CaO-Ca 2 SiO 4 catalyst on the kinetics of catalytic pyrolysis of straw, sawdust and cellulose finding an increase in the intensity of H 2 and CO observed by TG-MS and the reduction of activation energies for all biomasses. Moreover, Loy et al [5] reported a kinetic parameter during non-catalytic and catalytic pyrolysis of rice husk, using rice hull ash catalyst, obtaining E i values in the range of 190-186 kJ mol −1 and 154-150 kJ mol −1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Kinetics of the Catalytic Thermal Degradation of Sugarcane Residual Biomass Over Rh-Pt/CeO2-SiO2 for Syngas Production

et al. 2020

View full text Add to dashboard Cite

Thermochemical processes for biomass conversion are promising to produce renewable hydrogen-rich syngas. In the present study, model fitting methods were used to propose thermal degradation kinetics during catalytic and non-catalytic pyrolysis (in N2) and combustion (in synthetic air) of sugarcane residual biomass. Catalytic processes were performed over a Rh-Pt/CeO2-SiO2 catalyst and the models were proposed based on the Thermogravimetric (TG) analysis, TG coupled to Fourier Transformed Infrared Spectrometry (TG-FTIR) and TG coupled to mass spectrometry (TG-MS). Results showed three different degradation stages and a catalyst effect on product distribution. In pyrolysis, Rh-Pt/CeO2-SiO2 catalyst promoted reforming reactions which increased the presence of H2. Meanwhile, during catalytic combustion, oxidation of the carbon and hydrogen present in biomass favored the release of H2O, CO and CO2. Furthermore, the catalyst decreased the overall activation energies of pyrolysis and combustion from 120.9 and 154.9 kJ mol−1 to 107.0 and 138.0 kJ mol−1, respectively. Considering the positive effect of the Rh-Pt/CeO2-SiO2 catalyst during pyrolysis of sugarcane residual biomass, it could be considered as a potential catalyst to improve the thermal degradation of biomass for syngas production. Moreover, the proposed kinetic parameters are useful to design an appropriate thermochemical unit for H2-rich syngas production as a non-conventional energy technology.

show abstract

Section: Tg Analysismentioning

confidence: 99%

Section: Speciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Kinetics of the Catalytic Thermal Degradation of Sugarcane Residual Biomass Over Rh-Pt/CeO2-SiO2 for Syngas Production

et al. 2020

View full text Add to dashboard Cite

show abstract

“…As noted by Yang et al, 26 an understanding of the kinetics of a reaction is an absolute necessity for the project of reactor models, thus making it much harder to actually build a functional reactor.…”

Section: Introductionmentioning

confidence: 99%

Effects of reaction parameters on the deoxygenation of soybean oil for the sustainable production of hydrocarbons

Pimenta

Barreto

Santos

et al. 2020

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Hydrotreating of vegetable oils offers a green alternative to oil‐derived fuels and raw hydrocarbon materials, usually obtained from oil. In contrast to sulfided catalysts, which contaminate the product with sulfur, carbide‐based catalysts are able to produce clean hydrocarbons. A NiMo carbide‐based catalyst, supported on nanometric γ‐alumina was prepared, characterized by X‐ray crystallography, Nitrogen physisorption, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, and Raman spectroscopy. The oxidation temperatures and acidity were also determined. Tests were performed in a batch‐type reactor for the hydrotreatment of soybean oil at 360, 380, and 400°C and 4.5 MPa. Liquid samples were analyzed by gas chromatography with a mass spectra detector. The reaction rate was calculated showing that reactant concentration did not influence deoxygenation rates, nor did the catalyst revealed a significant change in the activity. The product composition was extensively characterized, proving that reaction temperature greatly influences the concentration of aromatic, unsaturated and saturated hydrocarbons, as well as chain size distributions.

show abstract

“…Los resultados hallados de la energía de activación de las biomasas sin catalizador muestran una excelente correlación con investigaciones similares. Las energías de activación de la biomasa más el catalizador no han podido ser comparados con similares porque como afirma Yang en [25] hay muchos estudios sobre la cinética de la pirólisis de la biomasa pero hay mucho menos sobre la cinética de la pirólisis catalítica de la biomasa y en este caso particular menos sobre la pirólisis catalítica empleando zeolitas como catalizador para la pirólisis del bagazo de caña de azúcar y de los racimos de frutos vacíos de la palma aceitera, la mayoría de los trabajos se han enfocado en el efecto del catalizador sobre los rendimientos de productos líquidos, gaseosos y sólidos.…”

Section: B Análisis Cinéticounclassified

Catalytic pyrolysis of the Empty Fruit Bunches of the Oil Palm and the Sugarcane Bagasse: Non-Isothermal Thermogravimetric Kinetic Analysis

Pretell¹,

Erazo²

2020

Proceedings of the 18th LACCEI International Multi-Conference for Engineering, Education, and Technology: Engineering, Integrat

View full text Add to dashboard Cite

The kinetics of the catalytic pyrolysis of the empty fruit bunches of the oil palm (EFB) and the sugarcane bagasse (SCB) were investigated, using the non-isothermal thermogravimetric analysis. Two isoconversional methods were applied, the Friedman differential method and the Ozawa-Flynn-Wall integral method. Five catalysts were evaluated: Equilibrium catalyst of FCC (Z2), ZSM-5 in pellet (Z3), zeolite ZSM-5 in spherical pellet (Z4), Zeolite Y powder (Z5) and zeolite ZSM-5 powder (Z6). The activation energy in the pyrolysis of the biomass with and without catalyst was calculated. Biomass with a particle size between 177 to 250 µm was mixed with an equal amount of catalyst (particle size less than 250 µm). In the thermogravimetric analyzer, it was heated from 30 °C to 900 °C under non-isothermal conditions at four heating rates 5, 10, 15 and 20 °C/min respectively, using nitrogen at 60 cm3/min as inertizing gas. Regarding the SCB, it was obtained that the catalyst Z2 had the lowest activation energy of 123.26 kJ/mol (OFW) and 123.91 kJ/mol (Friedman) and the BCA without catalyst 139.57 kJ/ mol (OFW) and 147.88 kJ/mol (Friedman) which indicates that it is the most useful for catalytic pyrolysis of SCB. In the pyrolysis of the EFB, activation energy values of 158.19 kJ / mol (OFW) and 146.56 kJ / mol (Friedman) were obtained without catalyst and that catalyst Z2 had the lowest values of activation energy, 114.48 kJ/mol (OFW) and 102.55 kJ/mol (Friedman), which indicates that it is suitable for catalytic pyrolysis of EFB. The catalyst with the highest activation energy was Z5 for both biomass and both methods (OFW and Friedman). For the SCB, values of 168.47 kJ/mol (OFW) and 168.42 kJ/mol (Friedman) were obtained and for EFB 163.77 kJ / mol (OFW) and 189.27 kJ/mol (Friedman), this indicates that it is not suitable for catalytic pyrolysis of SCB and EFB.

show abstract

Kinetics of catalytic biomass pyrolysis using Ni-based functional materials

Cited by 43 publications

References 47 publications

Kinetics of the Catalytic Thermal Degradation of Sugarcane Residual Biomass Over Rh-Pt/CeO2-SiO2 for Syngas Production

Kinetics of the Catalytic Thermal Degradation of Sugarcane Residual Biomass Over Rh-Pt/CeO2-SiO2 for Syngas Production

Effects of reaction parameters on the deoxygenation of soybean oil for the sustainable production of hydrocarbons

Catalytic pyrolysis of the Empty Fruit Bunches of the Oil Palm and the Sugarcane Bagasse: Non-Isothermal Thermogravimetric Kinetic Analysis

Contact Info

Product

Resources

About