Special issue on coal gasification: science and technology
- PDF / 142,928 Bytes
- 3 Pages / 595.276 x 790.866 pts Page_size
- 99 Downloads / 185 Views
Special issue on coal gasification: science and technology Lu Ding1 • Juntao Wei1 • Guangsuo Yu1,2
Published online: 22 September 2020 Ó The Author(s) 2020
Coal, one of the fossil fuels which is burned for heat, contributes a quarter of the world’s primary energy and two-fifths of its electricity. According to the World Energy Model (WEM) provided by the International Energy Agency (IEA), the total primary energy demand from coal reached 3750 Mtoe in 2017, and its growth rate will decrease a lot in the future 10–20 years. Nevertheless, coal will remain as the main primary energy in the next few decades. Coal gasification is the leading technology in achieving clean and efficient utilization of coal resources. Typical large-scale coal gasification technologies include Opposed Multi-Burner CWS gasification, GE Coal-Water Slurry (CWS) gasification, GSP pulverized coal gasification, SE pulverized coal gasification, and Shell pulverized coal gasification, etc. These coal gasification technologies can effectively improve coal utilization efficiency and reduce SOx, NOx, and CO2 emissions. As the name suggests, coal gasification entails thermochemical conversion of coal into a combustible gas which is similar to natural gas. Gasification may occur in a separate processing facility or a coal mine. Although the commercialized gasifiers are widespread all over the world, continuous fundamental research is necessary to meet the
& Lu Ding [email protected] & Guangsuo Yu [email protected]; [email protected] 1
Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai 200237, China
2
State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, Ningxia, China
technical challenges covering carbon conversion, nozzle and refractory lifetime, slagging issues and the corresponding syngas purification. Moreover, through in-depth basic research, the investment and operation cost of the actual plant will be further reduced. This special issue publishes eleven papers related to recent advances in basic research and technological development on the processes of coal gasification. As the first step in gasification, coal pyrolysis has a close relationship with coal gasification and combustion. Due to the differences in the solid microstructure resulted from different pyrolysis processes and gas reaction kinetics, the overall gasification reaction is influenced by the intrinsic reaction rate and transportation of gases involved. Pyrolysis not only greatly affects the reactivity of the corresponding char, but also is a significant method for producing high added-value liquid and gaseous products, especially aromatic compounds, which can be separated from tar in coal pyrolysis. The first paper investigated effects of conventional and microwave pyrolysis on charCO2 gasification. Kinetics and thermodynamic behaviors were well explored. Microwave pyrolytic char showed better thermodynamic performances with higher cold gas efficiency and CO mo
Data Loading...
