Catalytic gasification of food waste in supercritical water over La promoted Ni/Al2O3 catalysts for enhancing H2 production

Su, Hongcai; Kanchanatip, Ekkachai; Wang, Defeng; Zhang, Haidan; Antoni, Antoni; Mubeen, Ishrat; Huang, Zhicheng; Yan, Mi

doi:10.1016/j.ijhydene.2019.10.219

Cited by 65 publications

(12 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is possible to notice in Figure 10c that at 25% of biomass loading, the H 2 content increased considerably with the rise in temperature from 400 to 500 • C, while CO production was reduced, which is in agreement with the results presented by previous studies [26,27,55]. Conforming to the Le Chatelier principle, the steam-reforming endothermic reactions, related to the H 2 production, are favored by higher reaction temperatures [56]. Furthermore, the weak exothermic nature of the water-gas shift reaction, an important route of H 2 production, becomes dominant with the increase in temperature.…”

Section: The Effect Of Variables On H 2 and Co Productionsupporting

confidence: 90%

Supercritical Water Gasification of Coconut Shell Impregnated with a Nickel Nanocatalyst: Box–Behnken Design and Process Evaluation

et al. 2023

View full text Add to dashboard Cite

The energy conversion of nickel-impregnated coconut shells using supercritical water has not yet been explored. The impregnation process was conducted at room temperature and a pH of 5.80 for 72 h. Characterization of the prepared sample confirmed the presence of nickel nanoparticles with an average size of 7.15 nm. The gasification of control and impregnated samples was performed at 400–500 °C, biomass loading from 20 to 30 wt% and residence time from 20 to 60 min. The response surface methodology (RSM) approach, with a Box–Behnken method, was used to design the experiments. The optimization model showed that the non-catalytic process at 500 °C, 60 min and 20 wt% of biomass loading could promote an H2 yield of 8.8 mol% and gasification efficiency of 47.6%. The gasification of nickel-impregnated coconut shells showed significantly higher gasification efficiency (58.6%) and hydrogen yield (17.2 mol%) with greater carbon and hydrogen efficiencies (109.4 and 116.9%) when compared to the non-catalytic process. The presence of nickel particles in the biomass matrix as nanocatalysts promoted higher hydrogen production and supercritical water gasification efficiency.

show abstract

Section: The Effect Of Variables On H 2 and Co Productionsupporting

confidence: 90%

Supercritical Water Gasification of Coconut Shell Impregnated with a Nickel Nanocatalyst: Box–Behnken Design and Process Evaluation

et al. 2023

View full text Add to dashboard Cite

show abstract

“…According to their study, the activity of various catalysts in terms of hydrogen production is none > Pd/ C > Pt−Pd/C > Ru/C. Another research by Su et al 45 showed that addition of a certain amount of La (15% Ni/9La−Al 2 O 3 ) promoted the activity of 15% Ni/Al 2 O 3 catalyst and improved both the hydrogen yield and CGE. However, in the present study, the highest hydrogen yield and CGE were obtained using the 10% Ni−0.08% Ru/Al 2 O 3 −ZrO 2 catalyst even in the presence of ZrO 2 .…”

Section: Resultsmentioning

confidence: 99%

Biohydrogen Production by Catalytic Supercritical Water Gasification: A Comparative Study

et al. 2020

View full text Add to dashboard Cite

In this article, supercritical water gasification of biocrude at different conditions was performed and compared to each other. Three scenarios were considered while treating biocrude originating from cattle manure (CM) and corn husk (CH), namely, uncatalyzed feedstock, catalyzed with 10% Ni–0.08% Ru/Al2O3 and finally catalyzed with 10% Ni–0.08% Ru/Al2O3–ZrO2. It was found that 10% Ni–0.08% Ru/Al2O3–ZrO2 has performed significantly better than the other two scenarios over the 5 hour run time with a 193 and 187% higher hydrogen yield compared to the uncatalyzed and 10% Ni–0.08% Ru/Al2O3 catalyzed scenarios, respectively. Compared to CM gasification in the presence of a 10% Ni–0.08% Ru/Al2O3–ZrO2 catalyst, the catalyst got deactivated because of the high phenol and furan content in the corn husk biocrude, therefore hydrogen yield performance fell significantly. It was observed that the carbon gasification efficiency of the biocrude was independent of temperature. In terms of carbon conversion, the equilibrium conditions for the biocrude considered were attained at lower temperature. A mechanistic model based on the Eley–Rideal method was devised and tested against the obtained data. The dissociation of adsorbed oxygenated hydrocarbon is found to be the rate-determining step with an average absolute deviation of 3.55%.

show abstract

“…Use of catalysts is another important factor that can have a significant impact on SCWG performance. Ni/Al 2 O 3 is one of the catalysts that increase the hydrogen fraction in gases produced from SCWG, however, deactivation is an issue with it (H. Su, Kanchanatip, Wang, Zhang, et al, 2020), used a promoter (lanthanum or la) to overcome this issue and studied its effect on Ni/Al 2 O 3 . The results showed that 9 wt% La loading on Ni/Al 2 O 3 was optimal and produced a high hydrogen fraction (42.46%).…”

Section: Syngas From Mixed Food Wastementioning

confidence: 99%

Syngas production from thermochemical conversion of mixed food waste: A review

Yadav

Katiyar

Mesfer

et al. 2023

WIREs Energy & Environment

View full text Add to dashboard Cite

Lately, the generation of leftover food or cooked food waste has turned out to be a critical issue and its disposal in an environmental friendly way has been a challenge. This food waste is being sent for incineration and landfilling which results in a significant contribution to environmental pollution. Therefore, alternative methods for processing food waste in an environmentally benign way have been explored by many researchers. Thermochemical methods are one of those methods and are found to be promising for not only handling the food waste in an ecological way but also producing renewable energy efficiently in the form of bio-oil and syngas along with a solid byproduct, that is, biochar. However, the generation of syngas is favored by only two thermochemical processes, fast pyrolysis, and gasification. Some derived processes such as co-pyrolysis, and co-gasification can also generate syngas. All these

show abstract

Catalytic gasification of food waste in supercritical water over La promoted Ni/Al2O3 catalysts for enhancing H2 production

Cited by 65 publications

References 36 publications

Supercritical Water Gasification of Coconut Shell Impregnated with a Nickel Nanocatalyst: Box–Behnken Design and Process Evaluation

Supercritical Water Gasification of Coconut Shell Impregnated with a Nickel Nanocatalyst: Box–Behnken Design and Process Evaluation

Biohydrogen Production by Catalytic Supercritical Water Gasification: A Comparative Study

Syngas production from thermochemical conversion of mixed food waste: A review

Contact Info

Product

Resources

About