Production of H2-rich syngas from gasification of unsorted food waste in supercritical water

Su, Hongcai; Kanchanatip, Ekkachai; Wang, Defeng; Zheng, Rendong; Huang, Zhicheng; Yang, Chen; Mubeen, Ishrat; Yan, Mi

doi:10.1016/j.wasman.2019.11.018

Cited by 53 publications

(14 citation statements)

References 35 publications

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“…This means that a residence time of 95 min was sufficient to some extent to yield higher GE during SCW gasification of RH at the condition of feed concentration 6.5 wt % and 446 °C. In yet another study, 48 reported the “certain time” of 75 min at 480 °C and feed concentration of 5 wt % during SCW gasification of unsorted food waste under the conditions of temperature between 420 and 480 °C, feed concentration of 5–15 wt %, and residence time 30–75 min.…”

Section: Results and Discussionmentioning

confidence: 99%

Sub- and Supercritical Water Gasification of Rice Husk: Parametric Optimization Using the I-Optimality Criterion

et al. 2021

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In this study, rice husk biomass was gasified under sub- and supercritical water conditions in an autoclave reactor. The effect of temperature (350–500 °C), residence time (30–120 min), and feed concentration (3–10 wt %) was experimentally studied using the response surface methodology in relation to the yield of gasification products. The quadratic models have been suggested for both responses. Based on the models, the quantitative relationship between various operational conditions and the responses will reliably forecast the experimental outcomes. The findings revealed that higher temperatures, longer residence times, and lower feed concentrations favored high gas yields. The lowest tar yield obtained was 2.98 wt %, while the highest gasification efficiency and gas volume attained were 64.27% and 423 mL/g, respectively. The ANOVA test showed that the order of the effects of the factors on all responses except gravimetric tar yield follows temperature > feed concentration > residence time. The gravimetric tar yield followed a different trend: temperature > residence time > feed concentration. The results revealed that SCW gasification could provide an effective mechanism for transforming the energy content of RH into a substantial fuel product.

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Section: Results and Discussionmentioning

confidence: 99%

Sub- and Supercritical Water Gasification of Rice Husk: Parametric Optimization Using the I-Optimality Criterion

et al. 2021

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“…Despite the rapid development of various technologies for producing hydrogen from plastics in recent years, the route presented in this study still has its unique advantages over the previously reported technical routes. Su et al [68] studied supercritical water gasification of LDPE for hydrogen production at 480°C and 28 MPa. However, compared with the present study, their results showed that the H 2 yield was only 2.26 mol kg À 1 and the concentration of H 2 was about 37 %.…”

Section: Chemsuschemmentioning

confidence: 99%

Catalytic Reforming of the Aqueous Phase Derived from Diluted Hydrogen Peroxide Oxidation of Waste Polyethylene for Hydrogen Production

Tian

Zhu

et al. 2021

ChemSusChem

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The thermal degradation and conversion of waste polyethylene (PE) using a two-step process including hydrothermal oxidation (HO) and aqueous phase reforming (APR) were investigated. The objective of this study was to achieve efficient disposal of waste PE and generate H 2 in a mild and green way. The effects of various HO conditions on both HO and APR processes were studied. A high H 2 O 2 concentration caused overoxidation of PE resulting in more CO 2 . Decreasing the H 2 O 2 concentration weakened the overoxidation. The process using diluted H 2 O 2 exhibited the highest selectivity for acetic acid among the produced carboxylic acids. When the HO temperature exceeded 200°C, there was an increase in the CO 2 yield during the HO process and a decrease in the H 2 yield during the APR process. In addition, the effects of various monometallic and bimetallic catalysts on the reforming of the aqueous phase from the HO of PE were discussed. The highest H 2 mole fraction (51.52 %) in gaseous products from the APR process was obtained with Ru/ mesoporous carbon. Nevertheless, RuÀ Ni exhibited a higher stability than the monometallic Ru catalyst.

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“…Bai et al [43] also found that the reaction pressure (21-29 MPa) had little impact on the gasification efficiency because the properties of the supercritical water did not change significantly at these different pressures. Su et al [35] found that waste sorting is helpful to improve the H 2 -rich syngas production (or syngas yield) and gasification efficiency compared to unsorted waste. Xiang et al [28] studied the steam gasification of MSW with two different MSW particle sizes (20 < diameter < 30 mm and 80 < diameter < 100 mm), finding that the increase of particle size decreased the total volume fraction of H 2 and CO from 52% to 50%.…”

Section: Figurementioning

confidence: 99%

Solid Waste Gasification: Comparison of Single- and Multi-Staged Reactors

Zhao¹,

Li²,

Lamm³

et al. 2021

Gasification [Working Title]

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Interest in converting waste into renewable energy has increased recently due to concerns about sustainability and climate change. This solid waste is mainly derived from municipal solid waste (MSW), biomass residue, plastic waste, and their mixtures. Gasification is one commonly applied technology that can convert solid waste into usable gases, including H2, CO, CH4, and CO2. Single- and multi-staged reactors have been utilized for solid waste gasification. Comparison in reactor dimensions, operating factors (e.g., gasification agent, temperature, and feed composition), performance (e.g., syngas yield and selectivity), advantages, and disadvantages are discussed and summarized. Additionally, discussion will include economic and advanced catalysts which have been developed for use in solid waste gasification. The multi-staged reactor can not only be applied for gasification, but also for pyrolysis and torrefaction.

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Production of H2-rich syngas from gasification of unsorted food waste in supercritical water

Cited by 53 publications

References 35 publications

Sub- and Supercritical Water Gasification of Rice Husk: Parametric Optimization Using the I-Optimality Criterion

Sub- and Supercritical Water Gasification of Rice Husk: Parametric Optimization Using the I-Optimality Criterion

Catalytic Reforming of the Aqueous Phase Derived from Diluted Hydrogen Peroxide Oxidation of Waste Polyethylene for Hydrogen Production

Solid Waste Gasification: Comparison of Single- and Multi-Staged Reactors

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