H2 production from co-pyrolysis/gasification of waste plastics and biomass under novel catalyst Ni-CaO-C

Chai, Yue Sheng; Gao, Ningbo; Wang, Meihong; Wu, Chunfei

doi:10.1016/j.cej.2019.122947

Cited by 184 publications

(71 citation statements)

References 38 publications

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“…In the case of Ni‐AC, only metallic Ni peaks were noted in XRD results, unlike Ni‐CaO catalyst, where just NiO peaks were discovered in case of fresh catalyst. Compare Ni‐AC temperature‐programmed reduction (TPR) results to Ni‐CaO, lower H 2 consumption was recognized due to the own reduction capacity of the AC 41 …”

Section: Methodsmentioning

confidence: 99%

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H ₂ rich syngas

et al. 2020

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In this work, the co-pyrolysis of pine sawdust and low-density polyethylene (LDPE) was performed in a two-stage fixed-bed reactor to achieve hydrogenrich syngas and to investigate the effect of the parameters on gas yield and composition. Gas chromatography was used to confirm the content of the gas products. The pyrolysis was supported with Ni (in 5-25 wt%) loaded on activated carbon (AC). The maximum hydrogen concentration was 392.8 mmol g −1 sample, which was achieved by the use of the 10% Ni-AC catalyst. The influence of Ni loading on supporter was investigated by scanning electron microscope and transmission electron microscope techniques besides the thermogravity analysis. The increasing size of the Ni particles can be observed as a function of the Ni concentration on the catalyst. Carbon deposition was detected and the amorphous carbon seems more dominant than filamentous form. In addition, the effect of fluid residence time (water inlet and purge gas) on syngas yield was studied. Three different fluid residence times were investigated, and among them, the highest hydrogen yield was 392.8 mmol g −1 sample at 1.57 minutes residence time. Furthermore, the catalyst lifetime was studied using 10 wt% of Ni containing AC, and the average hydrogen concentration was 196.0 mmol g −1 sample over 15 cycles.

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Section: Methodsmentioning

confidence: 99%

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H ₂ rich syngas

et al. 2020

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“…Hydrocarbon dry (CO 2 ) reforming: Also, the production of CO may promote the water gas shift reaction and Boudouard reaction (Eqs. 7 and 8, respectively) Water gas shift reaction: Chai et al [10] investigated the pyrolysis-catalytic steam reforming of biomass (pine wood sawdust) and plastic (low-density polyethylene) and showed a similar increase in hydrogen yield with increasing catalytic steam reforming temperature. They used a two-stage, fixed bed pyrolysis-catalytic steam reforming reactor with a Ni-CaO-C catalyst.…”

Section: Oxygenated Hydrocarbons Dry (Co 2 ) Reformingmentioning

confidence: 99%

“…Chai et al [10] used a two-stage fixed bed pyrolysis-catalytic steam reforming reactor system with a biomass/plastic feedstock in the form of pine sawdust/low-density polyethylene. They reported an initial increase in hydrogen yield as the steam flow rate was increased but decreased at higher steam inputs.…”

Section: Effect Of Different Steam Input On the Co-pyrolysiscatalyticmentioning

confidence: 99%

“…Waste plastics are also a readily available resource that has been used for the production of hydrogen [7][8][9]. The hydrogen yield from biomass is relatively low compared to waste plastics because of the lower hydrogen content and the presence of high concentrations of oxygen in the biomass; the higher H:C ratio of plastics off-setting the high oxygen content of biomass [10]. Therefore, co-processing waste plastics with biomass to enhance the overall production of hydrogen has been investigated by several researchers [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Co-pyrolysis–catalytic steam reforming of cellulose/lignin with polyethylene/polystyrene for the production of hydrogen

Akubo

Nahil

Williams

2020

Waste Dispos. Sustain. Energy

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Co-pyrolysis of biomass biopolymers (lignin and cellulose) with plastic wastes (polyethylene and polystyrene) coupled with downstream catalytic steam reforming of the pyrolysis gases for the production of a hydrogen-rich syngas is reported. The catalyst used was 10 wt.% nickel supported on MCM-41. The influence of the process parameters of temperature and the steam flow rate was examined to optimize hydrogen and syngas production. The cellulose/plastic mixtures produced higher hydrogen yields compared with the lignin/plastic mixtures. However, the impact of raising the catalytic steam reforming temperature from 750 to 850 °C was more marked for lignin addition. For example, the hydrogen yield for cellulose/polyethylene at a catalyst temperature of 750 °C was 50.3 mmol g−1 and increased to 60.0 mmol g−1 at a catalyst temperature of 850 °C. However, for the lignin/polyethylene mixture, the hydrogen yield increased from 25.0 to 50.0 mmol g−1 representing a twofold increase in hydrogen yield. The greater influence on hydrogen and yield for the lignin/plastic mixtures compared to the cellulose/plastic mixtures is suggested to be due to the overlapping thermal degradation profiles of lignin and the polyethylene and polystyrene. The input of steam to the catalyst reactor produced catalytic steam reforming conditions and a marked increase in hydrogen yield. The influence of increased steam input to the process was greater for the lignin/plastic mixtures compared to the cellulose/plastic mixtures, again linked to the overlapping thermal degradation profiles of the lignin and the plastics. A comparison of the Ni/MCM-41 catalyst with Ni/Al2O3 and Ni/Y-zeolite-supported catalysts showed that the Ni/Al2O3 catalyst gave higher yields of hydrogen and syngas. Graphic abstract

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“…The various types of suitable catalysts, heating rate, residence time and temperature are control parameters for the pyrolysis process. Hydrogen production, high heating rate, reactor phase residence time and high temperature can support the gas product needed [29][30][31]. The selection of these parameters can be regulated by various reactors and heat transfer modes such as heat transfer in solid conductive and solid-gas convection heat.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Biomass Combustion and Conceptual Design of The Fluidized-Bed

Muhtadin¹,

Erdiwansyah²,

Mahidin³

et al. 2020

ARFMTS

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This study investigates the combustion process of empty fruit bunches (EFB) and palm kernel shells (PKS) in a bubbly fluidized-bed combustion chamber. The biomass combustion simulation process uses a kinetic model consisting of chemical kinetic and hydrodynamic flow. This modelling is based on the two-phase theory in the fluidized bed. Where both phases in the bed are assumed that there are a mass and energy transfer between them. These phases include the emulsion phase and the bubble phase which contains solid particles. The constant temperatures throughout the reactor are assumed in this modelling. This study also investigates the parametric and effects of various parameters carried out. The experimental research shows that there is a change in bed diameter and has a negligible effect on combustion performance. The results of biomass combustion experiments with a fluidized-bed design have promising and satisfying results compared to several experimental studies in the literature. In addition, the increase in reactor temperature and a bed height of combustion efficiency also increased. However, the moisture of the biomass and the speed of the fuel entering can affect various for combustion efficiencies. Suitable operating conditions can produce maximum overall efficiency.

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H2 production from co-pyrolysis/gasification of waste plastics and biomass under novel catalyst Ni-CaO-C

Cited by 184 publications

References 38 publications

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H ₂ rich syngas

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H ₂ rich syngas

Co-pyrolysis–catalytic steam reforming of cellulose/lignin with polyethylene/polystyrene for the production of hydrogen

Investigation of Biomass Combustion and Conceptual Design of The Fluidized-Bed

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H2 production from co-pyrolysis/gasification of waste plastics and biomass under novel catalyst Ni-CaO-C

Cited by 184 publications

References 38 publications

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H 2 rich syngas

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H 2 rich syngas

Co-pyrolysis–catalytic steam reforming of cellulose/lignin with polyethylene/polystyrene for the production of hydrogen

Investigation of Biomass Combustion and Conceptual Design of The Fluidized-Bed

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Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H ₂ rich syngas

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H ₂ rich syngas