Catalytic supercritical water gasification of glucose with in-situ generated nickel nanoparticles for hydrogen production

Huang, Jianbing; Chen, Zhu; Lian, Xiaoyan; Feng, Huifang; Sun, Jingli; Wang, Li; Jin, Hui

doi:10.1016/j.ijhydene.2019.04.184

Cited by 36 publications

(12 citation statements)

References 34 publications

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“…In this study, the temperature varied from 300 to 600 °C to determine the SCWG process’s performance with a BPS-to-Ni-EPW ratio of 1:10 for a retention time of 60 min (Table ). The research investigation shows that the cracking and reforming reactions mainly generate gases like H 2 , CH 4 , CO 2 , and CO. − Around subcritical and near-critical temperatures (300–400 °C), the gasification process proceeds via an ionic mechanism contributing to a greater yield of CH 4 over H 2 . , The matching trend was also observed in the present work at subcritical (300 °C) and near-critical temperatures (400 °C) with a low yield of H 2 (0.3 ± 0.01 and 1.2 ± 0.03 mmol·g –1 ) compared to the yield of CH 4 (0.5 ± 0.01 and 1.5 ± 0.04 mmol·g –1 ). Beyond the critical point of water, more reactive free radicals are generated, increasing the H 2 yield (4.5 ± 0.13 and 6.8 ± 0.20 mmol·g –1 ) over the CH 4 yield (3.18 ± 0.09 and 3.26 ± 0.1 mmol·g –1 ) at supercritical temperatures (500–600 °C).…”

Section: Resultssupporting

confidence: 80%

“…The research investigation shows that the cracking and reforming reactions mainly generate gases like H 2 , CH 4 , CO 2 , and CO. 26−28 Around subcritical and nearcritical temperatures (300−400 °C), the gasification process proceeds via an ionic mechanism contributing to a greater yield of CH 4 over H 2 . 26,29 The matching trend was also observed in the present work at subcritical (300 °C) and near-critical temperatures (400 °C) with a low yield of H 2 (0.3 ± 0.01 and 1.2 ± 0.03 mmol•g −1 ) compared to the yield of CH 4 (0.5 ± 0.01 and 1.5 ± 0.04 mmol•g −1 ). Beyond the critical point of water, more reactive free radicals are generated, increasing the H 2 yield (4.5 ) contributing to the enhancement of H 2 yield from 0.3 ± 0.01 to 6.8 ± 0.20 mmol•g −1 at the expense of CO. 30 However, the authors have also reported a reduction in CO levels and enhancement of H 2 levels with temperature.…”

Section: Tga and Dtg Analysissupporting

confidence: 88%

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In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

Kumar

Reddy

2023

Ind. Eng. Chem. Res.

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This study successfully utilized the banana pseudostem (BPS) to remove heavy metals (HMs) from nickel electroplating wastewater (Ni-EPW) while generating H 2 -rich gaseous fuel and synthesizing a valuable nanometal carbon matrix (NCM). This study highlights the synergetic effect of HMs promoting the decomposition of lignocellulosic biomass into H 2 -rich gaseous fuel, with simultaneous recovery of HMs from the metal effluent in the form of NCM and reduction of formed metal oxide to lower valence metal oxides or metals with an increase in the temperature (300−600 °C). This study also examined how the crucial parameters, like temperature, time, and biomass-to-Ni-EPW ratio, impact the process performance. The maximum H 2 yield (6.8 ± 0.20 mmol•g −1 ), total gas yield (TGY) (17.3 ± 0.51 mmol•g −1 ), and carbon gasification efficiency (CGE) (36%) were determined at 600 °C and a biomass-to-Ni-EPW ratio of 1:10 for a retention time of 60 min. The use of nickel electroplating wastewater with the banana pseudostem catalyzes the degradation of biomass reaction rate and water gas shift reaction. It improves the TGY, H 2 gas yield, and CGE to 2.2, 1.7, and 2.6 times, respectively, compared with Millipore water (without any metal). The NCM obtained at 600 °C has quasi-spherical morphology with a larger surface area of 146.2 m 2 •g −1 and exhibits magnetic saturation (M s ) of ∼3.42 emu•g −1 , which also finds its application in the fabrication of sensors and supercapacitors.

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Section: Resultssupporting

confidence: 80%

Section: Tga and Dtg Analysissupporting

confidence: 88%

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

Kumar

Reddy

2023

Ind. Eng. Chem. Res.

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“…Supercritical H 2 O gasification needs to overcome corrosion and fouling challenges but can be implemented cost-effectively at a smaller scale, demonstrates high reaction rates, and is not prohibitive from a capital investment perspective (Okolie et al, 2019). Cost-effective catalysis is key to economically viable H 2 production at temperatures 400 C, where scH 2 O presents opportunities to produce nano-catalyst in situ (Huang et al, 2019) and for the recycle of valuable metals from spent catalyst (Grumett, 2003). Pertinent to this study, in addition to serving as a source of renewable H 2 , the highly endothermic scH 2 O gasification reaction provides a heat sink for the highly exothermic gas fermentation.…”

Section: Systems Biology For Bdo Synthesis Using Co 2 and H 2 And Guaiacol As Sole Energy And Carbon Sourcesmentioning

confidence: 99%

A Sustainable Chemicals Manufacturing Paradigm Using CO2 and Renewable H2

et al. 2020

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The chemical industry must decarbonize to align with UN Sustainable Development Goals. A shift toward circular economies makes CO 2 an attractive feedstock for producing chemicals, provided renewable H 2 is available through technologies such as supercritical water (scH 2 O) gasification. Furthermore, high carbon and energy efficiency is paramount to favorable techno-economics, which poses a challenge to chemo-catalysis. This study demonstrates continuous gas fermentation of CO 2 and H 2 by the cell factory, Cupriavidus necator, to (R,R)-2,3-butanediol and isopropanol as case studies. Although a high carbon efficiency of 0.75 [(C-mol product)/(C-mol CO 2 )] is exemplified, the poor energy efficiency of biological CO 2 fixation requires 8 [(mol H 2 )/(mol CO 2 )], which is technoeconomically infeasible for producing commodity chemicals. Heat integration between exothermic gas fermentation and endothermic scH 2 O gasification overcomes this energy inefficiency. This study unlocks the promise of sustainable manufacturing using renewable feedstocks by combining the carbon efficiency of bio-catalysis with energy efficiency enforced through process engineering.

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“…Recent studies have employed this approach to impregnate nickel catalysts into different biomasses for subcritical and supercritical water gasification [17][18][19][20]. In the noncatalytic process, Nanda et al [20] related that the SCWG of wheat straw at 500 • C and a 1:10 biomass-to-water ratio produced gas yields and CGE (carbon gasification efficiency) higher than those found on SCWG of pinewood biomass.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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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.

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Catalytic supercritical water gasification of glucose with in-situ generated nickel nanoparticles for hydrogen production

Cited by 36 publications

References 34 publications

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

A Sustainable Chemicals Manufacturing Paradigm Using CO2 and Renewable H2

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

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Catalytic supercritical water gasification of glucose with in-situ generated nickel nanoparticles for hydrogen production

Cited by 36 publications

References 34 publications

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H2 Using Banana Pseudostem

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H2 Using Banana Pseudostem

A Sustainable Chemicals Manufacturing Paradigm Using CO2 and Renewable H2

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

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In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem