Xingxing Cheng, PhD, Professor. Prof. Cheng’s research interests are mainly gaseous pollution control, biomass processing and hydrogen technologies. She invented a novel technology of decoupled catalytic NOx reduction by CO, developed the required catalysts and designed the reactor. This technology was widely desired for flue gas treatment of steel, coking, and chemical industry due to its high sustainability and extremely low investment and operation cost. It could well meet the energy saving demand in the low carbon era. She has published more than 70 papers and has more than 20 patents authorized.
Speech Title: Low-carbon methods of gas pollutants removal for coal combustion
Abstract: All the coal-fired facilities emit large amount of gaseous pollutants and need gaseous pollution removal system, especially desulphurization and NOx reduction. Conventional desulphurization process uses limestone for SO2 adsorption, no matter wet flue gas desulphurization (FGD), dry or semi-dry FGD. Conventional NOx removal technology is selective catalytic reduction (SCR), using ammonia to reduce NOx into N2. For these processes, outer resources such as limestone and ammonia are needed, making the system highly relying on other industry. In this study, we summarized the work in our group in recent years and proposed a new concept—self-sustainable system for gaseous pollutants removal, using coal to prepare coke for adsorbent or catalysts and to removal SO2 and NOx. The adsorbed SO2 could be further reduced to produce elemental sulphur and NOx could be reduced to N2. Overall, no outer resource is needed in this system, and it could be considered as closed cycle, using fuel to clean fuel produced pollutants. In this presentation, recent development is summarized and the potential application of this system is revealed.