VO quantum dot-enhanced nitrogen-sulfur dual-doped hierarchical porous carbon electrodes from waste eggshell membranes for advanced flexible supercapacitors.

The weathering of rocks naturally creates abundant pore structures on their surfaces. Drawing inspiration from this, we present a simple yet effective approach-combining hydrothermal carbonization and pyrolysis carbonization-to synthesize multivalent vanadium oxide (VO) quantum dot-enhanced nitrogen- and sulfur-doped hierarchical porous carbon materials derived from waste biomass of eggshell membranes. These carbon materials, termed VO-S@CESM, are used as electrodes for supercapacitors.

Issues in deep peak regulation for circulating fluidized bed combustion: Variation of NO emissions with boiler load.

In order to improve the consumption of renewable energies, certain amounts of circulating fluidized bed (CFB) boiler units should assume the task of deep peak regulation. However, the effect of CFB boiler load on pollutant emissions such as NO still needs to be clarified. In this paper, the NO emission characteristics of two industrial-scale CFB boilers within a wide load range (35%-100%) were further analyzed by using a comprehensive one-dimensional, two-phase CFB mathematical model.