@article {46224,
	title = {Methane hydrate dissociation in the presence of novel benign additives},
	journal = {Energy Procedia},
	volume = {158},
	year = {2019},
	pages = {5856 - 5865},
	abstract = {<p>The apparent drawbacks of the classical approaches towards dissociation of natural gas hydrates have resulted in a paradigm shift into the development of new hybrid hydrate dissociation practices combining the various basic hydrate dissociation techniques. Another approach that can be followed to maximize the efficiency of gas production from natural gas hydrate reserves is the identification of benign additives which when used even in sparingly small concentrations may enhance the kinetics of hydrate dissociation. In the present work, a class of such additives, never reported before, have been unveiled and christened as Low Dosage Hydrate Dissociation Promoters (LHDPs). The additives were first short listed from a wide potential pool using a lab scale ( 250 ml) stirred tank reactor setup and then further studied using a bench scale ( 2.35 l) reactor setup where they were injected in the form of a water-additive stream to dissociate hydrates. The dissociation approach followed in the case of the bench scale reactor experiments was a combination of the thermal stimulation and depressurization processes along with the element of injection of additives. For both sets of experiments (lab and bench scale), the newly identified LHDPs were found to enhance the kinetics of methane hydrate dissociation as compared to pure water. It was observed that concentration of additive and its flow rate also affect the kinetics of methane hydrate dissociation. An energy and efficiency analysis for the hydrate dissociation method in the case of bench scale rector revealed that additive presence enhanced the energy ratio and thermal efficiency four fold as compared to pure water.</p>
},
	keywords = {Depressurization, Dissociation, Energy Ratio, kinetics, LHDP, methane hydrate, Thermal Efficiency, thermal stimulation},
	issn = {1876-6102},
	doi = {https://doi.org/10.1016/j.egypro.2019.01.540},
	url = {http://www.sciencedirect.com/science/article/pii/S1876610219305648},
	author = {Gaurav Bhattacharjee and Vivek Barmecha and Nilesh Choudhary and Nawal K. Pande and Parivesh Chugh and Rajnish Kumar}
}
@article {46858,
	title = {Thermodynamic analysis and experimental validation of multi-composition ammonia liquor absorption engine cycle for power generation},
	journal = {International Journal of Energy Research},
	volume = {44},
	year = {2020},
	month = {DEC},
	pages = {12430-12443},
	type = {Article},
	abstract = {<p>Energy conservation, utilization, and effective integration are of utmost importance for future sustenance. Accordingly, this work focuses on the generation of power from the low-grade temperature below 150 degrees C. A proposed novel multi-composition ammonia liquor absorption engine (MALAE) power cycle can be used toward the above purpose by supplying renewable energy obtained from low concentration type solar collectors. Proposed MALAE power cycle minimizes heal loss due to heat recovery and uses high purity NH3 vapors to expand through the isentropic turbine. MALAE power system is modeled and simulated using NH3-H2O as a working fluid for a reboiler temperature of 115 degrees C. The purpose of this work is to simulate the proposed MALAE power cycle with the distillation column and two solution heat exchanger (SHE). MALAE modeling and simulation is accomplished in SCILAB software. The simulation outcome is validated with the pilot-scale 5 kW experimental setup and validation showed +/- 5\% deviation. A comparison of MALAE cycle with published cycles signifies higher efficiency of MALAE cycle toward the utilization of low-grade energy from a temperature range of 100 degrees C to 150 degrees C. Finally, detailed parametric analysis of MALAE cycle efficiency is presented in terms of number of plates, distillation pressure and vapor flowrate, absorber temperature, pressure partial condenser temperature, and heat loads.</p>
},
	keywords = {absorption power cycle, ammonia water, low-temperature heat source, solar energy, Thermal Efficiency},
	issn = {0363-907X},
	doi = {10.1002/er.5463, Early Access Date = MAY 2020},
	author = {Satpute, Satchidanand R. and Takalkar, Gorakshnath and Mali, Nilesh and Bhagwat, Sunil}
}
