Green methods for hydrogen production

Dinçer, İbrahim

doi:10.1016/j.ijhydene.2011.03.173

Cited by 1,007 publications

(381 citation statements)

References 31 publications

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“…Development of efficient and low cost hydrogen production technologies is an urgent task due to the increased demand of clean energy generation [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. At present more than 50 million tons of hydrogen are produced annually worldwide and much of this hydrogen is used in the chemical and refinery industries [15].…”

Section: Introductionmentioning

confidence: 99%

“…At present more than 50 million tons of hydrogen are produced annually worldwide and much of this hydrogen is used in the chemical and refinery industries [15]. In the future, it is expected that H 2 could be widely used for power generation and in transport by fueling gas turbines, fuel cells and combustion engines [1][2][3][4][5][6][7][8][9][10][11]. The H 2 consumption rate steadily growths in the world and the 30% increase of global H 2 production is predicted in the next 5 years [15].…”

Section: Introductionmentioning

confidence: 99%

“…There are different technologies of hydrogen production using nonrenewable (natural gas reforming, coal gasification) as well as renewable (biomass processes, biological production etc.) resources, nuclear energy (high-temperature water splitting) and electricity (electrolysis of water) [3][4][5][6][7][8][9]. Although the "green" or carbon-neutral path from current fossil-based to future hydrogen economy is preferable and provides sustainable development [1][2][3][4], to date H 2 is usually produced from fossil fuels without CO 2 capture and storage [16,10,13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of POSS Nanotechnology for Preparation of Efficient Ni Catalysts for Hydrogen Production

Исмагилов

Матус

Kuznetsov

et al. 2017

Eurasian Chem. Tech. J.

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POSS (polyhedral oligomeric silsesquioxanes) nanotechnology was applied for preparation of efficient Ni catalysts for hydrogen production through autothermal reforming of methane (ATR of CH 4 ). The novel metal-POSS precursor [Nickel (II) -HeptaisobutylPOSS (C 4 H 9 ) 7 Si 7 O 9 (OH)O 2 Ni] of Ni nanoparticles was introduced into Ce 0.5 Zr 0.5 O 2 support with following calcination and reduction stages of activation. The peculiarity of the genesis of Ni/SiO 2 /Ce 0.5 Zr 0.5 O 2 nanomaterials and their characteristics versus deposition mode were studied by X-ray fluorescence spectroscopy, thermal analysis, N 2 adsorption, X-ray diffraction, high-resolution transmission electron microscopy and H 2 temperature-programmed reduction. The two kinds of supported Ni-containing particles were observed: highly dispersed Ni forms (1-2 nm) and large Ni-containing particles (up to 50-100 nm in size). It was demonstrated that the textural, structural, red-ox and, consequently, catalytic properties of ex-Ni-POSS catalysts depend on the deposition mode. The increase of a portion of difficultly reduced Ni 2+ species is found upon application of intermediate calcination during Ni-POSS deposition that has detrimental effect on the activity of catalyst in ATR of CH 4 . The Ni/SiO 2 /Ce 0.5 Zr 0.5 O 2 catalyst prepared by one-step Ni-POSS deposition exhibits the highest H 2 yield -80% at T = 800 °C.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of POSS Nanotechnology for Preparation of Efficient Ni Catalysts for Hydrogen Production

Исмагилов

Матус

Kuznetsov

et al. 2017

Eurasian Chem. Tech. J.

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“…Homogeneous reactions usually happen in the upper reactor zones. The species leaving the reactor depend on operating parameters such as temperature, pressure, species concentration, biomass particle size, and residence time [20]. The time for developing Table 1: Chemical reactions in gasification process, adapted from [9,21,22].…”

Section: Introductionmentioning

confidence: 99%

Adiabatic Fixed-Bed Gasification of Colombian Coffee Husk Using Air-Steam Blends for Partial Oxidation

Javier

Gordillo

2017

Journal of Combustion

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The increasing energy consumption, mostly supplied by fossil fuels, has motivated the research and development of alternative fuel technologies to decrease the humanity's dependence on fossil fuels, which leads to pollution of natural sources. Small-scale biomass gasification, using air-steam blends for partial oxidation, is a good alternative since biomass is a neutral carbon feedstock for sustainable energy generation. This research presents results obtained from an experimental study on coffee husk (CH) gasification, using air-steam blends for partial oxidation in a 10 kW fixed-bed gasifier. Parametric studies on equivalence ratio (ER) (1.53 < ER < 6.11) and steam-fuel (SF) ratio (0.23 < SF < 0.89) were carried out. The results show that increasing both SF and ER results in a syngas rich in CH 4 and H 2 but poor in CO. Also, decreased SF and ER decrease the peak temperature ( peak ) at the gasifier combustion zone. The syngas high heating value (HHV) ranged from 3112 kJ/SATPm 3 to 5085 kJ/SATPm 3 and its maximum value was obtained at SF = 0.87 and ER = 4.09. The dry basis molar concentrations of the species, produced under those operating conditions (1.53 < ER < 6.11 and 0.23 < SF < 0.89), were between 1.12 and 4.1% for CH 4 , between 7.77 and 13.49% for CO, and between 7.54 and 19.07% for H 2 . Other species were in trace amount.

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“…It is actually mainly produced from fossil fuels and steam reforming processes are the most common production methods to generate it. Approximately 50% of world's hydrogen production comes from the steam reforming of natural gas [1]. In recent years, many studies have been developed to produce hydrogen from renewable sources, like ethanol, bio-oil, acetic acid, glycerol, etc.…”

Section: Introductionmentioning

confidence: 99%

Catalytic steam reforming of olive mill wastewater for hydrogen production

Casanovas

Galvis

Llorca

2015

International Journal of Hydrogen Energy

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Olive mill wastewater Catalytic honeycombsHydrogen production a b s t r a c t Catalytic honeycombs functionalized with lanthanum-stabilized ceria as catalytic support and impregnated with different metals (Rh, Ru, Pt, Pd and Ni) were prepared and tested for hydrogen production through the steam reforming of distillated, three-phase olive mill wastewater (OMW). Tests were carried out at atmospheric pressure, different temperatures (873e1023 K), and space velocities (4500e16,000 h -1 ) over catalytic honeycombs loaded with ca. 3 mg cm -2 of catalyst. The catalytic performance was evaluated in terms of hydrogen production, selectivity of gaseous products and stability for 24 h. The best results were obtained over Pt-and Rh-based catalytic systems. Chemical oxygen demand values were determined to quantify the total organic content of OMW and post-reaction condensate to quantify the extension of the reaction. Total organic contents were found to be 5.4 mg L -1 and 0.2e0.5 mg L -1 in OMW distillate and post-reaction condensate, respectively, which leads to a 90e96 % of organic content removal during the steam reforming process. Up to 40 STP mL of pure hydrogen per mL of distillated olive mill wastewater were produced over Pt/CeLa at 973 K and 16,000 h -1 . X-ray photoelectron spectroscopy analyses revealed carbon and calcium deposition during catalytic reaction.

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Green methods for hydrogen production

Cited by 1,007 publications

References 31 publications

Application of POSS Nanotechnology for Preparation of Efficient Ni Catalysts for Hydrogen Production

Application of POSS Nanotechnology for Preparation of Efficient Ni Catalysts for Hydrogen Production

Adiabatic Fixed-Bed Gasification of Colombian Coffee Husk Using Air-Steam Blends for Partial Oxidation

Catalytic steam reforming of olive mill wastewater for hydrogen production

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