Prediction of In-Situ Gasification Chemical Looping Combustion Effects of Operating Conditions

Wang, Xiaojia; Jin, Baosheng; Liu, Hao; Zhang, Bo; Zhang, Yong

doi:10.3390/catal8110526

Cited by 9 publications

(3 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We first developed a three-dimensional numerical model to simulate the gas-fueled CLC process in the BFB fuel reactor [61,62]. Thereafter, we successfully built a fuel reactor model with the high-flux circulating fluidized bed (HFCFB) structure to investigate the fundamental features of iG-CLC, including composition distributions, fuel conversions, reaction rates, in the fuel reactor [63,64]. Further, we also developed a cold-state full-loop three-dimensional a model to predict the directional separation processes of the fine coal particles and the coarse oxygen carrier particles in an HFCFB iG-CLC system [65].…”

Section: Of 17mentioning

confidence: 99%

See 1 more Smart Citation

Numerical Investigation of Solid-Fueled Chemical Looping Combustion Process Utilizing Char for Carbon Capture

et al. 2019

View full text Add to dashboard Cite

The in-depth understanding of the gas–solid flow and reaction behaviors, and their coupling characteristics during the chemical looping combustion (CLC) process has the guiding significance for the operation and optimization of a chemical looping combustor. A three-dimensional numerical model is applied to investigate the char-fueled CLC characteristics in a fuel reactor for efficient CO2 separation and capture. Simulations are carried out in a bubbling fluidized bed fuel reactor with a height of 2.0 m and a diameter of 0.22 m. The initial bed height is 1.1 m, and hence the height–diameter ratio of the slumped bed is five. The oxygen carrier is prepared with 14 wt% of CuO on 86 wt% of inert Al2O3. In the process of mathematical modeling, a Eulerian-Eulerian two-fluid model is adopted for both of the gas and solid phases. Gas turbulence is modeled on the basis of a k–ε turbulent model. The reaction kinetics parameters are addressed based upon previous experimental investigations from literature. During the simulation, the gas–solid flow patterns, composition distributions, and reaction characteristics are obtained. Moreover, the effects of solids inventory and fluidizing number on the reaction performance are elucidated in-depth. The results have shown that the reaction rates have close relationship with the flow patterns and the distributions of gas concentrations. Compared to the steam-char gasification over sand, the application of char-fueled CLC can effectively promote the conversion of gasification products. In addition, higher CO2 concentration at the outlet can be achieved by increasing the initial solids inventory or decreasing the fluidizing number. Some calculated values are verified by the previous data, indicating that the current three-dimensional models are reasonable to study the process mechanism of char-fueled CLC.

show abstract

Section: Of 17mentioning

confidence: 99%

“…ξ p is the bulk viscosity of solid phase. The standard k-ε turbulent model is adopted to describe the turbulence of gas phase [64,67,68]:…”

Section: Hydrodynamic Modelsmentioning

confidence: 99%

Numerical Investigation of Solid-Fueled Chemical Looping Combustion Process Utilizing Char for Carbon Capture

et al. 2019

View full text Add to dashboard Cite

show abstract

“…In the field of computational fluid dynamics, a predictive model has been presented for the simulation of the in situ Gasification Chemical Looping Combustion (iG-CLC) process in a circulating fluidized bed (CFB) riser fuel reactor [9]. Interestingly, CLC was demonstrated as a promising technology to implement CO 2 capture.…”

mentioning

confidence: 99%