Understanding mineral behaviors during anthracite fluidized-bed gasification based on slag characteristics

Understanding the slag transformation behaviors during entrained‐flow gasification based on comparative analysis of slag properties

“…Thereafter, the temperature was increased to 815 C and kept for 2 h. Finally, the ashes were removed, cooled to room temperature, and then transferred to a cabinet dryer. 11 To identify the crystalline phases in the slag, XRD analysis was measured by an X-ray diffractometer (D8 Discover, Bruker, Germany) at the condition of 40-kV voltage and 80-mA current with Cu Kα radiation, operated with a step size of 0.01 at a scanning speed of 1 2θ/min from 5 to 90 2θ.…”

An investigation on the fusibility characteristics of low-rank coals and biomass mixtures

“…The ash fusion temperature (AFT) of gasification feedstock is fundamental to understanding the mineral behavior of the feedstock, as well as the mechanism and prevention of slag formation during gasification [20,21], as it partially reflects the fusion, flow, and rheological characteristics of ash or slag during coal conversion [22,23]. Despite its shortcomings, AFT is still the most acceptable measure for ash-slag propensity during gasification [24].…”

“…Thus, we performed a co-gasification test for low-rank coal and biomass using a Pressurized Ash Agglomerating Fluidized Bed ( Fig. 1 [20]) at a pilot plant for gasification at the Institute of Coal Chemistry of the Chinese Academy of Sciences. However, the gasification system was occasionally shut down because of slag formation during co-gasification.…”

Potentials of whole process control of heavy metals emissions from coal-fired power plants in China

“…Therefore, the proportion of Hg 0 in the total Hg emission reaches up to about 74.3-74.8% in 293 2020 due to the continuous increase of WFGD application from 2010 to 2020 (see 294 Supplementary Data Table S12). Specially, compared with Hg 2+ and Hg P , Hg 0 is much easier 295 to transport long distances even causing trans-boundary concerns due to relatively higher Table S12).…”

“…The coal ashes consist mainly of SiO 2 and Al 2 O 3 (generally greater than 60% of the 173 total ash). The CaO content in Chinese coal ashes generally decreases in the order lignite < 174 anthracite < bituminous coal (Li, 2014;Liu, 2005;Zhu, 2015). When the flue gas pass 175 through downstream conventional air pollution control devices, such as SCR, ESP/FFs and 176 FGD, part of these heavy metals with gaseous forms or adhered with fine particles can be 177 synergistically removed from the flue gas.…”