Role of Hydrogen Energy Carriers

Mitsushima, Shigenori; Hacker, Viktor

doi:10.1016/b978-0-12-811459-9.00011-6

Cited by 9 publications

(8 citation statements)

References 5 publications

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“…Hence, to cover the continued increase in end-uses, H 2 is synthetically/artificially produced by chemical methods. These methods mean that more than 96% of H 2 comes from fossil fuels in a variety of processes that also generate CO 2 (Armaroli and Balzani, 2011;Zou and Zhang, 2015;Mitsushima and Hacker, 2018;Voitic et al, 2018). The resulting H 2 must be cleaned of carbonaceous impurities before use, which adds complexity and additional costs.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Carbon-Nitrogen-Sulfur-Nickel Networks Derived From Polyaniline as Bifunctional Catalysts for Water Splitting

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Nanostructured Carbon-Nitrogen-Sulfur-Nickel Networks Derived From Polyaniline as Bifunctional Catalysts for Water Splitting

et al. 2020

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“…The oxygen uptake rate (OUR) in mol/L.h was calculated using Equation (7), where dDO dt signifies the rate of change in dissolved oxygen over time.…”

Section: Diazotrophic Growthmentioning

confidence: 99%

“…Elevated temperatures, up to 773 K, result in faster reaction rates, but this is at a Gibbs free energy cost (∆G o = 23.6 kJ/mol H 2 at 773 K). Consequently, the process requires elevated pressures up to approximately 20 MPa [6] to maintain an exergonic Gibbs free energy change of −10 kJ/mol H 2 at a temperature of 773 K [7].…”

Section: Introductionmentioning

confidence: 99%

Diazotrophic Behaviour in a Non-Sterile Bioreactor: The Effect of O2-Availability

et al. 2021

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The behaviour of a locally isolated diazotrophic consortium was investigated with the prospect of agricultural applications. A repeatable culture was obtained in a non-sterile bioreactor. Metagenomic analysis indicated Chryseobacterium ssp. and Flavobacterium ssp. were the dominant species, making up approximately 50% of the microbial community. The oxygen supply was varied and mass-transfer limited growth was attained under all experimental conditions. Negligible amounts of aqueous metabolites were formed, indicating a high selectivity towards biomass production. High oxygen availability resulted in decreased growth efficiencies i.e., the specific energy requirements for biomass synthesis. This was attributed to reduced electron transport chain efficiencies and nitrogenase protection mechanisms. Mass and energy balances indicated that sessile biomass with a high C:N served as a carbon sink. The most efficient growth was measured at an aeration feed composition of 21% oxygen and 79% nitrogen. The study presents one of the only known investigations of operational conditions on diazotrophic growth in a non-sterile bioreactor. In addition, it provides a strong foundation for the development of a Biological Nitrogen Fixation process with scaling potential.

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“…Relevant property estimations of the desired product (i.e., high-pressure hydrogen leaving compression system) are reported in Table . The package Zudkevitch-Joffee was validated by calculating the accuracy of such properties compared to property data found in the literature. − The availability of contributions stating properties of hydrogen at 16 540 kPa and 153 °C limited the validation of further physical, chemical, and thermal properties. However, model accuracy sits above 90% for all the properties under comparison that confirms proper selection of the thermodynamic model for accurate process simulation.…”

Section: Case Study: Compressor System In Hydrocracking Plantsmentioning

confidence: 99%

Integrated Approach of Safety, Sustainability, Reliability, and Resilience Analysis via a Return on Investment Metric

Moreno-Sader

Jain

Tenorio

et al. 2019

ACS Sustainable Chem. Eng.

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The process design and technology selection are driven by multiple objectives including technical, economic, environmental, safety, and resilience drivers. Traditionally, technoeconomic analyses have been used to select and optimize the process design. Subsequently, environmental, safety, and resilience issues have been included in post-design analysis. With the recognition of the importance of including various objectives during the early stages of the process design, there has been a growing interest in the development of systematic methods for the multi-objective conceptual design. Recently, novel concepts have been proposed for the incorporation of sustainability and safety in designs through financial frameworks. In the current work, an extended approach is proposed for the incorporation of reliability, resilience, safety, and sustainability aspects during the conceptual design of the process system. In this proposed methodology, safety and sustainability weighted return on investment metric (SASWROIM) is extended to include impacts of resilience and reliability aspects with different design changes and configurations. For this purpose, a safety, sustainability, reliability, and resilience weighted return on investment metric (S2R2WROIM) is introduced. Multi-objective decision-making can thus be carried out for the optimal design based on this augmented method over the convention economic return on investment metric. The general methodology to screen process alternatives through S2R2WROIM begins with the synthesis and simulation of base case and alternative case flowsheet in Aspen HYSYS. This is followed by performance analysis, evaluation of various metrics, and applications of integrated metric to select the recommended design. A compressor process system case study in a hydrocracking process plant is demonstrated to illustrate the applications and benefits of the proposed methodology. The new approach provides decision makers with meaningful information and insights about safety, reliability, resilience, and sustainability along with the economic aspect.

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Role of Hydrogen Energy Carriers

Cited by 9 publications

References 5 publications

Nanostructured Carbon-Nitrogen-Sulfur-Nickel Networks Derived From Polyaniline as Bifunctional Catalysts for Water Splitting

Nanostructured Carbon-Nitrogen-Sulfur-Nickel Networks Derived From Polyaniline as Bifunctional Catalysts for Water Splitting

Diazotrophic Behaviour in a Non-Sterile Bioreactor: The Effect of O2-Availability

Integrated Approach of Safety, Sustainability, Reliability, and Resilience Analysis via a Return on Investment Metric

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