Effects of an environmentally-friendly, inexpensive composite iron–sodium catalyst on coal gasification

New insights into synergistic effects and active species toward Hg0 emission control by Fe(VI) absorbent

“…The fractions of the different Fe(VI) species as a function of pH are revealed in Fig. 7(a) [25,26] Hg 0 ðlÞ þ Hg 2þ $ Hg 2þ …”

Gas evolution characteristics during pyrolysis and catalytic pyrolysis of coals by TG–MS and in a high-frequency furnace

“…In fact, the catalysts not only have effects on the gasification process, but also play important roles in the pyrolysis stage of carbonaceous material. However, there are still rare reports about the effects of added metallic species on the pyrolysis process of coal, especially on the product distributions and structural changes of char [7,8].…”

“…Pyrolysis is not only an effective way for clean use of coal as desulfurized char and tar can be obtained, but also a significant method for high added-value liquid and gaseous products, especially aromatic compounds, can be separated from tar in coal pyrolysis [9]. Compared to non-catalytic pyrolysis, coal pyrolysis with the added catalysts may result in different releasing temperatures and yields of the gaseous products [3,7]. What's more, the differences in mechanisms of catalytic and non-catalytic pyrolysis of coals must take significant effects on the subsequent gasification reactivity of the produced char [4,5].…”

“…Gas chromatography (GC) is often used for quantitative analysis of pyrolytic gas mixtures [1,3,7]. However, the low time resolution makes it unsuitable for real-time analysis (e.g.…”

Development of composited rare-earth promoted cobalt-based Fischer–Tropsch synthesis catalysts with high activity and selectivity

“…Fischer-Tropsch synthesis (FTS)converts syngas derived from natural gas, coal [1][2][3] and Recently, increasing attentionhas beenpaid to maximize the yields of C 10 -C 20 and C 20 + 46 products [9]. Various supports (e.g., SiO 2 , γ-Al 2 O 3 ,SBA-15 and MCM-41) and/or promoters (Re, 47 reportedthat the addition of small amounts of RE metal oxidescould modify cobalt-based catalyst 49 electronically or structurally, thus improving their performancetothe desired products [10][11][12][13][14].…”