The Experts below are selected from a list of 84063 Experts worldwide ranked by ideXlab platform

P Gimenez - One of the best experts on this subject based on the ideXlab platform.

  • the calcium looping caco3 cao Process for thermochemical energy storage in concentrating solar power plants
    Renewable & Sustainable Energy Reviews, 2019
    Co-Authors: C Ortiz, J M Valverde, Ricardo Chacartegui, Luis A Perezmaqueda, P Gimenez
    Abstract:

    Abstract Energy storage based on thermochemical systems is gaining momentum as a potential alternative to molten salts in Concentrating Solar Power (CSP) plants. This work is a detailed review about the promising Integration of a CaCO3/CaO based system, the so-called Calcium-Looping (CaL) Process, in CSP plants with tower Technology. The CaL Process relies on low cost, widely available and non-toxic natural materials (such as limestone or dolomite), which are necessary conditions for the commercial expansion of any energy storage Technology at large scale. A comprehensive analysis of the advantages and challenges to be faced for the Process to reach a commercial scale is carried out. The review includes a deep overview of reaction mechanisms and Process Integration schemes proposed in the recent literature. Enhancing the multicycle CaO conversion is a major challenge of the CaL Process. Many lab-scale analyses carried out show that residual effective CaO conversion is highly dependent on the Process conditions and the CaO precursors used, reaching values in a wide range (0.07–0.82). The selection of the optimal operating conditions must be based on materials performance, Process Integration, Technology and economics aspects. Global plant efficiencies over 45% (without considering solar-side losses) show the interest of the Technology. Furthermore, the technological maturity and potential of the Process is assessed. The direction towards which future works should be headed is discussed.

Muhammad Aziz - One of the best experts on this subject based on the ideXlab platform.

  • cogeneration of power and h2 by steam gasification and syngas chemical looping of macroalgae
    Applied Energy, 2017
    Co-Authors: Ilman Nuran Zaini, Anissa Nurdiawati, Muhammad Aziz
    Abstract:

    Abstract A cogeneration system is proposed in this study to produce H2 and generate power from brown macroalgae with a high moisture content. The Processes used in the cogeneration system consisted of drying, steam gasification, syngas chemical looping (SCL), and power generation. Enhanced Process Integration Technology was utilized to maximize heat recovery in the system by minimizing the destruction of exergy. The SCL system used in this study consisted of a fuel reactor, a steam reactor, and an air reactor. Iron oxide was utilized as the circulating oxygen carrier in the SCL system and was reduced and oxidized during its passage through the SCL reactors. The performance of the cogeneration system was evaluated at different target moisture contents during drying, steam-to-biomass ratios during gasification, and operating pressures in the SCL system by means of Process simulation using the Aspen Plus software package. The results of the simulation show that the proposed system had a relatively high total efficiency (about 72%), which consisted of H2 production and power generation efficiencies of about 57% and 15%, respectively.

  • clean co production of h2 and power from low rank coal
    Energy, 2016
    Co-Authors: Muhammad Aziz, Winarto Kurniawan, Firman Bagja Juangsa, Bentang Arief Budiman
    Abstract:

    This work proposes a state-of-the art integrated system for the co-production of H2 and power from low rank coal with high total energy efficiency. A model of this system is developed based on enhanced Process Integration Technology, incorporating coal drying, gasification, chemical looping, power generation, and hydrogenation. In this model, heat circulation and Process Integration technologies are effectively combined, minimizing the exergy losses. Iron-based materials are used as oxygen carriers and are circulated in a chemical looping module consisting of three continuous Processes: reduction, oxidation, and combustion. The toluene-methyl cyclohexane system is employed as a liquid organic H2 carrier to store H2 generated from coal. The effects of the fluidization velocity in drying, the steam-to-fuel ratio in gasification, and the chemical looping pressure are evaluated with regard to the power generation and H2 production efficiencies as well as the overall efficiency, and the proposed integrated system exhibits very high efficiencies of approximately 12, 72, and 84%, respectively.

  • clean co production of h 2 and power from low rank coal
    Energy, 2016
    Co-Authors: Muhammad Aziz, Winarto Kurniawan, Firman Bagja Juangsa, Bentang Arief Budiman
    Abstract:

    Abstract This work proposes a state-of-the art integrated system for the co-production of H 2 and power from low rank coal with high total energy efficiency. A model of this system is developed based on enhanced Process Integration Technology, incorporating coal drying, gasification, chemical looping, power generation, and hydrogenation. In this model, heat circulation and Process Integration technologies are effectively combined, minimizing the exergy losses. Iron-based materials are used as oxygen carriers and are circulated in a chemical looping module consisting of three continuous Processes: reduction, oxidation, and combustion. The toluene-methyl cyclohexane system is employed as a liquid organic H 2 carrier to store H 2 generated from coal. The effects of the fluidization velocity in drying, the steam-to-fuel ratio in gasification, and the chemical looping pressure are evaluated with regard to the power generation and H 2 production efficiencies as well as the overall efficiency, and the proposed integrated system exhibits very high efficiencies of approximately 12, 72, and 84%, respectively.

  • power generation from algae employing enhanced Process Integration Technology
    Chemical Engineering Research & Design, 2016
    Co-Authors: Muhammad Aziz
    Abstract:

    Abstract An integrated power-generation system with enhanced Process Integration (EPI), using macroalgae as a fuel source, is proposed. The integrated system includes a drying, conversion through gasification, and power generation in a combined cycle. An EPI that combines heat circulation and Process Integration was used to significantly reduce the exergy destruction in the integrated system. Brown seaweed Fucus sp. was selected as a representative macroalgae. The influence of fluidization velocities during drying and gasification on power generation efficiency was evaluated. The proposed integrated system showed an extremely high power generation efficiency of approximately 60%. No significant relationship was found between the fluidization velocities in drying and gasification to total power generation efficiency. The effect of the turbine inlet temperature (TIT) in the gas turbine was also evaluated. It showed that a higher TIT resulted in higher total power generation efficiency due to enhanced energy/heat recovery, especially from the steam turbine.

C Ortiz - One of the best experts on this subject based on the ideXlab platform.

  • the calcium looping caco3 cao Process for thermochemical energy storage in concentrating solar power plants
    Renewable & Sustainable Energy Reviews, 2019
    Co-Authors: C Ortiz, J M Valverde, Ricardo Chacartegui, Luis A Perezmaqueda, P Gimenez
    Abstract:

    Abstract Energy storage based on thermochemical systems is gaining momentum as a potential alternative to molten salts in Concentrating Solar Power (CSP) plants. This work is a detailed review about the promising Integration of a CaCO3/CaO based system, the so-called Calcium-Looping (CaL) Process, in CSP plants with tower Technology. The CaL Process relies on low cost, widely available and non-toxic natural materials (such as limestone or dolomite), which are necessary conditions for the commercial expansion of any energy storage Technology at large scale. A comprehensive analysis of the advantages and challenges to be faced for the Process to reach a commercial scale is carried out. The review includes a deep overview of reaction mechanisms and Process Integration schemes proposed in the recent literature. Enhancing the multicycle CaO conversion is a major challenge of the CaL Process. Many lab-scale analyses carried out show that residual effective CaO conversion is highly dependent on the Process conditions and the CaO precursors used, reaching values in a wide range (0.07–0.82). The selection of the optimal operating conditions must be based on materials performance, Process Integration, Technology and economics aspects. Global plant efficiencies over 45% (without considering solar-side losses) show the interest of the Technology. Furthermore, the technological maturity and potential of the Process is assessed. The direction towards which future works should be headed is discussed.

J M Valverde - One of the best experts on this subject based on the ideXlab platform.

  • the calcium looping caco3 cao Process for thermochemical energy storage in concentrating solar power plants
    Renewable & Sustainable Energy Reviews, 2019
    Co-Authors: C Ortiz, J M Valverde, Ricardo Chacartegui, Luis A Perezmaqueda, P Gimenez
    Abstract:

    Abstract Energy storage based on thermochemical systems is gaining momentum as a potential alternative to molten salts in Concentrating Solar Power (CSP) plants. This work is a detailed review about the promising Integration of a CaCO3/CaO based system, the so-called Calcium-Looping (CaL) Process, in CSP plants with tower Technology. The CaL Process relies on low cost, widely available and non-toxic natural materials (such as limestone or dolomite), which are necessary conditions for the commercial expansion of any energy storage Technology at large scale. A comprehensive analysis of the advantages and challenges to be faced for the Process to reach a commercial scale is carried out. The review includes a deep overview of reaction mechanisms and Process Integration schemes proposed in the recent literature. Enhancing the multicycle CaO conversion is a major challenge of the CaL Process. Many lab-scale analyses carried out show that residual effective CaO conversion is highly dependent on the Process conditions and the CaO precursors used, reaching values in a wide range (0.07–0.82). The selection of the optimal operating conditions must be based on materials performance, Process Integration, Technology and economics aspects. Global plant efficiencies over 45% (without considering solar-side losses) show the interest of the Technology. Furthermore, the technological maturity and potential of the Process is assessed. The direction towards which future works should be headed is discussed.

Ricardo Chacartegui - One of the best experts on this subject based on the ideXlab platform.

  • the calcium looping caco3 cao Process for thermochemical energy storage in concentrating solar power plants
    Renewable & Sustainable Energy Reviews, 2019
    Co-Authors: C Ortiz, J M Valverde, Ricardo Chacartegui, Luis A Perezmaqueda, P Gimenez
    Abstract:

    Abstract Energy storage based on thermochemical systems is gaining momentum as a potential alternative to molten salts in Concentrating Solar Power (CSP) plants. This work is a detailed review about the promising Integration of a CaCO3/CaO based system, the so-called Calcium-Looping (CaL) Process, in CSP plants with tower Technology. The CaL Process relies on low cost, widely available and non-toxic natural materials (such as limestone or dolomite), which are necessary conditions for the commercial expansion of any energy storage Technology at large scale. A comprehensive analysis of the advantages and challenges to be faced for the Process to reach a commercial scale is carried out. The review includes a deep overview of reaction mechanisms and Process Integration schemes proposed in the recent literature. Enhancing the multicycle CaO conversion is a major challenge of the CaL Process. Many lab-scale analyses carried out show that residual effective CaO conversion is highly dependent on the Process conditions and the CaO precursors used, reaching values in a wide range (0.07–0.82). The selection of the optimal operating conditions must be based on materials performance, Process Integration, Technology and economics aspects. Global plant efficiencies over 45% (without considering solar-side losses) show the interest of the Technology. Furthermore, the technological maturity and potential of the Process is assessed. The direction towards which future works should be headed is discussed.