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ANG storage system with internal thermal control of the activated carbon bed based on finned type heat exchanger Simulation is performed using the theoretical models developed to evaluate the thermal behavior and the storage capacity of the ANG storage system during its cyclic processes and f) to conduct experiments of an ANG storage prototype mainly for the charge and discharge processes The storage. .. Introduction 1.2 Motivation for this Research Due to the increasing demand of NG throughout the world, the ANG storage system has become popular in the field of developing efficient gas storage and transportation technologies Although the conventional storage techniques, such as the CNG and LNG methods, which are widely used for gas storage and transportation purposes, are associated operational complexity... the Storage Cylinder and AC Bed Heat Exchanger………………………………………………………… 195 x Summary Summary The extensive usage of the adsorbed natural gas (ANG) storage system is mainly hindered by the thermal effects during its cyclic operations due to the adsorption and desorption processes In this research, the ANG storage system is comprehensively studied both experimentally and theoretically for enhanced storage. .. 163 7.2 Limitations and Recommendations 166 References 168 Appendix A Determination of Regeneration Temperature for the Activated Carbons ………………………………………………………… 185 Appendix B Experimental Adsorption Uptake Data………………….…… 188 Appendix C Drawings and Dimensions of the Cryostat……………………… 191 Appendix D Drawings and Dimensions of the Storage Cylinder and AC Bed Heat Exchanger……………………………………………………... the storage capacity of the ANG storage system depends on the porous structure of the adsorbent material The most promising adsorbents are the microporous activated carbons with relatively high packing densities (Quinn and Macdonald, 1992; Alcãz-monge et al., 2009) and high specific surface area (Menon and Komarneni, 1998) Considerable efforts have been made for the development of suitable activated carbons. .. brief description of the adsorption fundamentals In the second section, developments of adsorbents for the ANG storage system are described following by a thorough review 7 Introduction of the activated carbons Finally, an extensive literature review on advances in the ANG storage system both in theory and experiment is provided Chapter 3 describes experimental details of measuring adsorption characteristics,... Chapter 5 provides a theoretical analysis for the thermodynamic quantities of an adsorption system The adsorption uptake data for methane /activated carbon systems are used in this chapter to evaluate the adsorbed phase thermodynamic quantities at various pressure, temperature and uptake conditions Chapter 6 presents the detailed theoretical study and experimental investigations of an ANG storage prototype... operating conditions during the charge and the discharge cycles 132 Table B.1 Experimental uptake data for adsorption of methane onto Maxsorb III 188 Table B.2 Experimental uptake data for adsorption of methane onto ACF (A-20) 189 Table B.3 Experimental uptake data for adsorption of methane onto Chemviron 190 xix Nomenclature Nomenclature A Adsorption potential [kJ/kg] C Adsorption equilibrium...Table of Contents 5.3.3 Heat of Adsorption 107 5.3.4 Adsorbed Phase Specific Heat Capacity 111 5.3.5 Adsorbed Phase Entropy and Enthalpy 113 5.4 Conclusions 115 Chatper 6 Theoretical and Experimental Study of the ANG Storage Prototype 117 6.1 Introduction 117 6.2 Theoretical Modeling of the ANG Storage System .118 6.2.1 Thermodynamic... years, adsorbed natural gas (ANG) storage system has attracted considerable attention as a possible alternative to the CNG and the LNG methods for energy storage and transportation purposes (Vasiliev et al., 2000; Bastos-Neto et al., 2005a; Mota, 2008) The ANG storage system provides high energy density but operates at much lower pressure (usually 2 to 4 MPa) than the CNG method Also, the ANG system . EXPERIMENTAL AND THEORETICAL STUDIES ON ADSORBED NATURAL GAS STORAGE SYSTEM USING ACTIVATED CARBONS KAZI AFZALUR RAHMAN NATIONAL UNIVERSITY OF SINGAPORE 2011 EXPERIMENTAL AND THEORETICAL STUDIES ON. Saha, W.G. Chun, K.C. Ng, Theoretical modeling and simulation for adsorbed natural gas storage system using activated carbon, Proceedings of the 9 th International Conference on Sustainable Energy. 14 2.3.2 Activated Carbons 15 2.3.2.1 Precursor materials and synthesis of activated carbons 16 2.3.2.2 Features of a good carbon adsorbent for natural gas storage 17 2.3.2.3 Types of activated carbons