Advances in coal gasification, hydrogenation, and gas treating for the production of chemicals and fuels.

The concept of chemical looping reactions has been widely applied in chemical industries, for example, the production of hydrogen peroxide (H2O2) from hydrogen and oxygen using 9,10-anthraquinone as the looping intermediate Fundamental research on chemical looping reactions has also been applied to energy systems, for example, the splitting of water (H2O) to produce oxygen and hydrogen using ZnO as the looping intermediate Fossil fuel chemical looping applications had been used commercially with the steam-iron process for coal from the 1900s to the 1940s and had been demonstrated at a pilot scale with the carbon dioxide acceptor process in the 1960s and 1970s There are presently no chemical looping processes using fossil fuels in commercial operation A key factor that hampered the continued use of these earlier processes for fossil energy operation was the inadequacy of the reactivity and recyclability of the looping particles This factor led to higher costs for product generation using the chemical 

Chemical Looping Technology and Its Fossil Energy Conversion Applications

Iron-based syngas chemical looping process and coal-direct chemical looping process development at Ohio State University

Chemical‐looping technology platform

https://digital.csic.es/bitstream/10261/183949/1/Applied%20Energy%20232%20%282018%29%20657-684.pdf

Negative CO2 emissions through the use of biofuels in chemical looping technology: A review

The syngas chemical looping process co-produces hydrogen and electricity from syngas through the cyclic reduction and regeneration of an iron oxide based oxygen carrier. In this article, the reducer, which reduces the oxygen carrier with syngas, is investigated through thermodynamic analysis, experiments, and ASPEN Plus® simulation. The thermodynamic analysis indicates that the countercurrent moving-bed reducer offers better gas and solids conversions when compared to the fluidized-bed reducer. The reducer is continuously operated for 15 h in a bench scale moving-bed reactor. A syngas conversion in excess of 99.5% and an oxygen carrier conversion of nearly 50% are obtained. An ASPEN Plus® model is developed which simulates the reducer performance. The results of simulation are consistent with those obtained from both the thermodynamic analysis and experiments. Both the experiments and simulation indicate that the proposed SCL reducer concept is feasible. © 2009 American Institute of Chemical Engineers AIChE J, 2010

Zachary Yoscovits

Papers

Syngas chemical looping gasification process: Bench‐scale studies and reactor simulations