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Three commercial inhibitors were investigated for their suitability in preventing the spontaneous combustion of noncaking coal (NCC) and gas coal (GC), two coals of low metamorphic grades. Simultaneous thermal analysis, Fourier transform infrared spectroscopy, and kinetic analysis demonstrated that Zn/Mg/Al-CO3-layered double hydroxides (LDHs) and diammonum phosphate ([NH4]2HPO4) both exhibited substantial...
In this study, a low-temperature geothermal organic Rankine cycle (ORC) system was designed to generate electric power using geothermal resource from abandoned oil wells in the Huabei oilfield of China. Several main sections were constructed including the geothermal water cycle, intermediate water cycle, ORC, cooling water cycle, lubricant oil cycle, bypass and control systems. Using R245fa as the...
A novel H2S sorbent based on SnO2 and Y2O3 is developed by a co-precipitation method for steam regenerative removal of H2S from hot syngas at moderate temperatures (400–500 °C). SnO2-Y2O3 sorbent is stable in a reducing atmosphere (i.e. 500 °C, 50% H2) and achieves a 99.9% H2S removal during successive desulfurization and regeneration cycles. The addition of yttrium to SnO2 decreases the reduction...
Detailed exergy and exergoeconomic analyses are performed for a combined cogeneration cycle in which the waste heat from a recompression supercritical CO2 Brayton cycle (sCO2) is recovered by a transcritical CO2 cycle (tCO2) for generating electricity. Thermodynamic and exergoeconomic models are developed on the basis of mass and energy conservations, exergy balance and exergy cost equations. Parametric...
Due to the intermittence and fluctuation of wind resource, the increasing penetration level of wind power will bring huge challenges to maintain the stability of power system. In order to smooth the wind power output, additional controllable power from conventional power plant or energy storage system is required. In current paper, one basic scheme of liquid carbon dioxide storage system is proposed...
Tobacco rob (TR) gasification experiments were carried out using thermogravimetric analyzer and gas chromatographic analyzer (TG–GC). Under the catalytic and non-catalytic condition, the pyrolysis characteristics, gasification characteristics and kinetics of TR were investigated in nitrogen-steam atmosphere. In the gasification process, the volumetric model was used in modeling pyrolysis of TR and...
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