Technical Challenges and Prospects of Renewable Fuel Generation and Utilization at a Global Scale

Srivastava, Rajesh K.

doi:10.1002/9781119724872.ch2

Cited by 5 publications

(3 citation statements)

References 80 publications

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“…1−4 In order to reduce the carbon emission in the energy production, the world is looking for carbon-free energy. 5,6 On one side, production of green energy, for example, solar power, and wind power, has seen a sharp increase, but these energy sources cannot fulfill the global demands due to various reasons. 7,8 In this context, nuclear energy is projected as one of the alternative sources for substituting the carbon-based energy sources.…”

Section: Introductionmentioning

confidence: 99%

“…The increased demand in global energy has resulted in a consequential and continuous increase in the carbon emission that has adversely affected the environment. − In order to reduce the carbon emission in the energy production, the world is looking for carbon-free energy. , On one side, production of green energy, for example, solar power, and wind power, has seen a sharp increase, but these energy sources cannot fulfill the global demands due to various reasons. , In this context, nuclear energy is projected as one of the alternative sources for substituting the carbon-based energy sources. − This aspect has higher relevance for the developing countries like India, where a significant fraction of the future energy demand is projected to be achieved by nuclear energy. , However, long-term sustainability of the nuclear energy program becomes questionable due to limited availability of the natural fissile nuclear materials like 235 U. To address this challenge, closing the nuclear fuel cycle, which envisages reprocessing the spent fuel, will be a judicious solution since the spent nuclear fuel contains more fissile nuclear materials than are consumed. , The reprocessing of the spent nuclear fuel with the well-known “PUREX” (Plutonium Uranium Redox Extraction) process, on the other hand, produces large volumes of highly radioactive wastes, commonly referred to as high-level waste (HLW).…”

Section: Introductionmentioning

confidence: 99%

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Understanding the Complexation of Alkyl-Substituted Nitrilotriacetamides with Uranium: A Study by Absorption Spectroscopy and Microcalorimetry

Ansari,

Bhattacharyya,

Mohapatra

et al. 2024

Inorg. Chem.

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Complexation thermodynamics of UO 2 2+ ions with a series of alkyl-substituted nitrilotriacetamides (NTA) was investigated by absorption spectroscopy and microcalorimetry. The hexamethyl derivative of NTA (HMNTA) forms the weakest two successive complexes with UO 2 2+ ions with stability constants of log β 11 = 3.5 ± 0.1 and log β 12 = 6.1 ± 0.1. The formation constant values increased linearly with increasing alkyl chain length of the substituents from hexamethyl NTA to hexabutyl NTA (HBNTA) and to hexahexyl NTA (HHNTA). The complexation with each ligand was both enthalpy and entropy driven with exothermic enthalpy changes of ΔH 11 = −14.7 ± 1.0 kJ/mol, ΔH 12 = −10.2 ± 0.8 kJ/mol for HMNTA, ΔH 11 = −19.2 ± 1.2 kJ/mol, ΔH 12 = −16.4 ± 1.1 kJ/mol for HBNTA, and ΔH 11 = −21.3 ± 1.4 kJ/mol, ΔH 12 = −19.4 ± 2.3 kJ/mol for HHNTA. Similarly, the positive entropy changes with each ligand were ΔS 11 = 18.1 ± 2.7 J/mol/K, ΔS 12 = 82.9 ± 3.8 J/mol/K for HMNTA, ΔS 11 = 14.4 ± 1.2 J/mol/K, ΔS 12 = 87.2 ± 4.2 J/mol/K for HBNTA, and ΔS 11 = 16.1 ± 2.4 J/mol/K, ΔS 12 = 92.6 ± 3.1 J/mol/K for HHNTA. Structural features of the complex suggest the participation of two ligands coordinating in a bidentate mode via the carbonyl oxygens. The [UO 2 L 2 ] 2+ complexes appear to be noncentrosymmetric with two ligands and one water molecule occupying the equatorial plane of the dioxo uranyl cation. The structure of the complex was confirmed by 1 H NMR titration, EXAFS measurements, and DFT calculations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Understanding the Complexation of Alkyl-Substituted Nitrilotriacetamides with Uranium: A Study by Absorption Spectroscopy and Microcalorimetry

Ansari,

Bhattacharyya,

Mohapatra

et al. 2024

Inorg. Chem.

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“…Hence, research is ongoing to develop and advance innovative technologies and infrastructures needed to drive sustainable energy sources [2], [3]. Biomass gasification is one of the new energy sources capable of contributing a large share in the global energy mix.…”

Section: Introductionmentioning

confidence: 99%

Sliding mode control for gasifier reactor temperature control

Ajah,

Eke,

Okoye

et al. 2024

Nig. J. Tech.

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This paper presents a sliding mode control (SMC) design for gasifier reactor temperature control. Temperature control is a critical aspect of biomass gasification for quality syngas production. However, accurate modeling and effective control method are the major challenges of gasifier reactor temperature control. The gasification system processes are not yet well understood to model from the first principle due to the complex and nonlinear nature of the process. Also, conventional control methods such as proportional, integral, and derivative control have not been effective in controlling gasification systems. Hence, this work has used experimental data from a 500 kVA updraft gasifier reactor to develop a data-driven mathematical model. The system identification result predicts 86.36% goodness of fit on the model data and 88.26% on the validation data. Discrete time sliding mode control has been designed from the model and implemented in Simulink to investigate the performance of the control method on the gasifier. The result of the system time response shows that the controller effectively drives the temperature monotonically from 25°C to 700 °C in finite time (11.37 minutes). It also establishes a quasi-sliding motion with an ultimate band of ±1℃ for the remainder of the simulation time. Hence, the control technique guarantees optimal temperature control for any feedstock type which will result in higher conversion efficiency, more syngas yield, and improve syngas quality and durability of the gasifier reactor among others.

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Case Study: Financial Returns of a Small Home On-Grid PV System vs. Off-Grid System for Water Heating

Magdin,

Vanek,

Koprda

et al. 2024

Lecture Notes in Networks and Systems

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Technical Challenges and Prospects of Renewable Fuel Generation and Utilization at a Global Scale

Cited by 5 publications

References 80 publications

Understanding the Complexation of Alkyl-Substituted Nitrilotriacetamides with Uranium: A Study by Absorption Spectroscopy and Microcalorimetry

Understanding the Complexation of Alkyl-Substituted Nitrilotriacetamides with Uranium: A Study by Absorption Spectroscopy and Microcalorimetry

Sliding mode control for gasifier reactor temperature control

Case Study: Financial Returns of a Small Home On-Grid PV System vs. Off-Grid System for Water Heating

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