The Amorphous Alloy-catalyzed Hydroconversion of Demineralized Shengli Coal Liquefaction Residue Under Microwave Irradiation

Direct liquefaction techniques on lignite coal: A review

“…Consequently, various liquid products can be detected after the direct liquefaction of lignite coals from Shengli lignite, [15,83] Xianfeng lignite, [91,83], and Huolinguole lignite [104]. As has been shown in Fig.…”

“…Other than iron, other catalysts afforded good conversion in some cases, although often at high hydrogen pressures (13 MPa [80] and 20 MPa [88]), as shown in Table 6. Among these catalysts, NaOH [80], [Bmim]Cl [82], Ni-B/SiO2 [83], and fumed Table 3 Summary of the major DCL processes developed globally. Here, "a" represents the first-stage; "b" indicates the second-stage, and "c" shows the recycled solvent for the catalytic hydrogenation.…”

“…silica [89] were quite effective catalysts. Ni-B/SiO2 exhibited efficient conversion at a low temperature and pressure in methanol (solvent) [83]. Notably, an interesting phenomenon occurs during the liquefaction of Shengli lignite with NaOH/methanol.…”

“…A study on the different lignite coals including Shengli lignite [15,20,83], Elbistan lignite [79], and Mulah low-ranking coal [101] has been carried out under different conditions. The cyclic products obtained via direct liquefaction can be categorized into mono-, bi-, tri-, and polycylic (Fig.…”