Hydrogen-enriched natural gas in a decarbonization perspective

Deng, Yimin; Dewil, Raf; Appels, Lise; Tulden, Flynn Van; Li, Shuo; Yang, Miao; Baeyens, Jan

doi:10.1016/j.fuel.2022.123680

Cited by 42 publications

(15 citation statements)

References 49 publications

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“…According to international engineering experience, existing natural gas pipelines can transport HCNG within a certain range of hydrogen blending ratio after proper retrofit or even without retrofit [3][4][5][6]. HCNG can also be used as an alternative fuel for some natural gas utilization facilities to improve their environmental performance while maintaining normal operating conditions [7,8]. Since HCNG can buffer the technical and cost obstacles to the development of pure hydrogen energy, it is considered to be an effective transition measure to promote the large-scale, long-distance transportation and utilization of renewable energy in the form of green hydrogen [9].…”

Section: Motivationmentioning

confidence: 99%

Multi‐stage flexible planning of regional electricity‐HCNG‐integrated energy system considering gas pipeline retrofit and expansion

Qiu

Zhou

et al. 2022

IET Renewable Power Gen

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The development of hydrogen-enriched compressed natural gas (HCNG) can make full use of the existing natural gas infrastructure, thereby alleviating the economic and technical pressure on the development of pure hydrogen. This paper proposes a multistage flexible planning method for the regional electricity-HCNG-integrated energy system (E-HCNG-IES), which considers the medium and long-term dynamic characteristics of the E-HCNG-IES. For each sub-regional energy station, an energy-hub type model including hydrogen/HCNG-related equipment and facilities is established. Considering the influence of hydrogen blending on the energy delivery capacity and line pack of pipelines, a hydrogen-resistant retrofit model for existing natural gas pipelines between sub-regions is proposed. Meanwhile, the model for newly constructed hydrogen pipelines is also presented. Subsequently, a series of flexibility evaluation indicators are proposed to support the performance analysis of planning schemes. The lateral comparison of sub-cases in Changzhou, China demonstrates that considering the hydrogen-resistant retrofit of natural gas pipelines can reduce the construction cost of hydrogen pipelines by about 37.12%. The peak shaving capacity of underground hydrogen storage (UHS), the energy recycling ability of turbo expander (TE), and the space-time decoupling ability of hydrogen in energy supply and demand have also been confirmed.

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Section: Motivationmentioning

confidence: 99%

Multi‐stage flexible planning of regional electricity‐HCNG‐integrated energy system considering gas pipeline retrofit and expansion

Qiu

Zhou

et al. 2022

IET Renewable Power Gen

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“…These COPs proclaimed the leading role of renewable energy in solving climate problems. The wider use of hydrogen was advocated [1,2] through, e.g., hydrogen-enriched natural gas [3], the direct reduction of iron ore [4], the use of hydrogen in the minerals' processing [5], and the production of CO 2 -based synthetic natural gas [6], among others. It is important to assess the ways that hydrogen production can help to meet the renewable energy goals.…”

Section: Introduction 1the Need To Develop H 2 Productionmentioning

confidence: 99%

“…Since there are no significant resources of hydrogen on earth, hydrogen is referred to as a secondary energy carrier, made from a primary energy source (nowadays, ~95% from fossil fuels) [1,3]. The global transition to hydrogen as an energy carrier accompanies the rise in required "green" energy.…”

Section: Introduction 1the Need To Develop H 2 Productionmentioning

confidence: 99%

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Water Splitting by MnOx/Na2CO3 Reversible Redox Reactions

Liu

Dewil

et al. 2022

Sustainability

Self Cite

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Thermal water splitting by redox reactants could contribute to a hydrogen-based energy economy. The authors previously assessed and classified these thermo-chemical water splitting redox reactions. The Mn3O4/MnO/NaMnO2 multi-step redox cycles were demonstrated to have high potential. The present research experimentally investigated the MnOx/Na2CO3 redox water splitting system both in an electric furnace and in a concentrated solar furnace at 775 and 825 °C, respectively, using 10 to 250 g of redox reactants. The characteristics of all reactants were determined by particle size distribution, porosity, XRD and SEM. With milled particle and grain sizes below 1 µm, the reactants offer a large surface area for the heterogeneous gas/solid reaction. Up to 10 complete cycles (oxidation/reduction) were assessed in the electric furnace. After 10 cycles, an equilibrium yield appeared to be reached. The milled Mn3O4/Na2CO3 cycle showed an efficiency of 78% at 825 °C. After 10 redox cycles, the efficiency was still close to 60%. At 775 °C, the milled MnO/Na2CO3 cycles showed an 80% conversion during cycle 1, which decreased to 77% after cycle 10. Other reactant compounds achieved a significantly lower conversion yield. In the solar furnace, the highest conversion (>95%) was obtained with the Mn3O4/Na2CO3 system at 775 °C. A final assessment of the process economics revealed that at least 30 to 40 cycles would be needed to produce H2 at the price of 4 €/kg H2. To meet competitive prices below 2 €/kg H2, over 80 cycles should be achieved. The experimental and economic results stress the importance of improving the reverse cycles of the redox system.

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“…Hydrogen is considered the most promising energy carrier of the future. According to the forecasts, ‘blue’ and ‘green’ hydrogen will be generated in industrial amounts from fossils or water (by electrolysis) using solar, wind, geothermal, tidal, or hydro power [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. An important method for hydrogen production, which is worthy of note, is solar-driven hydrogen production by photocatalytic water splitting in the presence of specially designed complex nanocomposites [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Recovery from Waste Aluminum–Plastic Composites Treated with Alkaline Solution

Buryakovskaya

Vlaskin

2022

Materials

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An alternative solution to the problem of aluminum–plastic multilayer waste utilization was suggested. The process can be used for hydrogen generation and layer separation. Three different sorts of aluminum–plastic sandwich materials were treated with an alkali solution. In the temperature range of 50–70 °C, for tablet blisters of polyvinylchloride and aluminum (14.8 wt.%), the latter thoroughly reacted in 15–30 min. For sheets of paper, polyethylene, and aluminum (20 wt.%), full hydrogen ‘recovery’ from reacted aluminum component took 3–8 min. From the lids of polyethylene terephthalate, aluminum (60 wt.%), and painted polyethylene with perforations, the aluminum was consumed after 45–105 min. The effect of perforations was the reduction of the process duration from nearly 90 min for the lids with no perforations to nearly 45 min for the perforated ones (at 70 °C). Perforations provided better contact between the aluminum foil, isolated between the plastic layers, and the alkali solution. Hydrogen bubbles originating near those perforations provided foil separation from the upper painted plastic layer by creating gas gaps between them. The remaining components of the composite multilayer materials were separated and ready for further recycling.

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Hydrogen-enriched natural gas in a decarbonization perspective

Cited by 42 publications

References 49 publications

Multi‐stage flexible planning of regional electricity‐HCNG‐integrated energy system considering gas pipeline retrofit and expansion

Multi‐stage flexible planning of regional electricity‐HCNG‐integrated energy system considering gas pipeline retrofit and expansion

Water Splitting by MnOx/Na2CO3 Reversible Redox Reactions

Hydrogen Recovery from Waste Aluminum–Plastic Composites Treated with Alkaline Solution

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