Improving aromatic hydrocarbons yield from coal pyrolysis volatile products over HZSM-5 and Mo-modified HZSM-5

Aromatic Compounds from Lignin Liquefaction over ZSM‐5 Catalysts in Supercritical Ethanol

“…Due to such advantages, numerous applications of ZSM‐5 zeolites have been reported. Mihalcik et al and Li et al stated a significant improvement in aromatic hydrocarbon production over ZSM‐5 zeolites. Singh and co‐workers claimed that HZSM‐5 and Ni‐doped HZSM‐5 catalysts are efficient for hydrodeoxygenation of lignin.…”

Catalytic upgrading of gaseous tars over zeolite catalysts during coal pyrolysis

“…Approximately 1 mg of the coal sample was placed in a quartz tube. Catalyst (0.6 mg) was placed under the coal sample, and quartz wool was used to separate the layers of coal and catalyst, based on a sample loading diagram reported in the literature [11]. Helium (99.999%) was used as the carrier gas to purge the pyrolysis products to the GC.…”

“…The catalytic upgrading of gaseous tar has been investigated [2,[8][9][10][11][12][13][14]. For example, Wang et al [8] performed catalytic in-situ tar reforming reactions during the pyrolysis and gasification of brown coal using a char-based catalyst in a two-stage reactor.…”

Catalytic Pyrolysis of Low Rank Canadian Boundary Dam Coal over ZSM‐5 and LTL Zeolites

“…Rathsack and Otto analyzed the liquid products obtained from slow non‐catalytic pyrolysis of brown coal using GC‐MS, and Li et al investigated the conversion of volatile products from coal pyrolysis using Mo/HZSM‐5 and HZSM‐5 zeolites. Their study showed that these zeolites can improve the aromatic hydrocarbon yields from coal pyrolysis volatile products …”

“…Their study showed that these zeolites can improve the aromatic hydrocarbon yields from coal pyrolysis volatile products. [9,17] In this study, we established new starting gel compositions to synthesize crystalline pentasil-type (zeolite socony mobil-5 or ZSM-5) and Linde type L (LTL or L) zeolites (potassium form) via a direct hydrothermal synthesis method using conventional silicon sources without using any templates, known as structure directing agents (SDAs). The modified zeolites were used as the catalysts for coal pyrolysis, and the catalytic results indicated the different behaviours of the fabricated zeolites with respect to gaseous and liquid product distributions.…”