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Chemical Compositional Analysis of Catalytic Hydroconversion Products of Heishan Coal Liquefaction Residue

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ABSTRACT

Liquefaction residue of Heishan bituminous coal (HLR) was subject to two hydroconversion reactions under 5 MPa initial pressure of hydrogen at 300°C for 3 h, without catalyst and with acid supported catalyst (ASC), respectively. The reaction products were analyzed with gas chromatography/mass spectrometer (GC/MS). The results show that 222 organic compounds were detected totally in the products and they can be divided into alkanes, aromatic hydrocarbons (AHCs), phenols, ketones, ethers, and other species (OSs). The yield of hydroconversion over the ASC is much higher than that without catalyst. The most abundant products are aromatic hydrocarbons in the reaction products from both catalytic and noncatalytic reactions of HLR. The yield of aromatic hydrocarbons in the reaction product from hydroconversion with the ACS is considerably higher than that from hydroconversion without a catalyst.

No MeSH data available.


FTIR spectra of the AC and ASC.
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fig1: FTIR spectra of the AC and ASC.

Mentions: As Figure 1 shows, the absorbances at 2925 and 2857 cm−1 attributed to CH3 group and >C-C< moiety [14] were observed in the AC, which had to be found in the ASC. The absorbances of -OH group at 3416 cm−1 and >C=C< moiety at 1620 cm−1 in the ASC are stronger than those in the AC [14]. The absorbance between 800 and 600 cm−1 attributed to C-Cl stretching vibration absorption [15]. The appearance of C-Cl bonds at 769 cm−1 in ASC indicates that the reaction of SbCl5 with the AC was carried out during the process of ASC preparation [16, 17]. The pore volume, average pore diameter, and surface area of AC were 0.53 cm3/g, 2.85 nm, and 743 m2/g, respectively. However, the pore volume, average pore diameter, and surface area of ASC were 0.26 cm3/g, 2.66 nm, and 526.3 m2/g, respectively. It indicates that the pore diameter of catalyst decreased after impregnation with SbCl5; the active component loaded on the inner surface of the pore in AC was possibly the reason. Therefore, the pore volumes, average pore diameter, and surface areas were all decreased after impregnation.


Chemical Compositional Analysis of Catalytic Hydroconversion Products of Heishan Coal Liquefaction Residue
FTIR spectra of the AC and ASC.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5304314&req=5

fig1: FTIR spectra of the AC and ASC.
Mentions: As Figure 1 shows, the absorbances at 2925 and 2857 cm−1 attributed to CH3 group and >C-C< moiety [14] were observed in the AC, which had to be found in the ASC. The absorbances of -OH group at 3416 cm−1 and >C=C< moiety at 1620 cm−1 in the ASC are stronger than those in the AC [14]. The absorbance between 800 and 600 cm−1 attributed to C-Cl stretching vibration absorption [15]. The appearance of C-Cl bonds at 769 cm−1 in ASC indicates that the reaction of SbCl5 with the AC was carried out during the process of ASC preparation [16, 17]. The pore volume, average pore diameter, and surface area of AC were 0.53 cm3/g, 2.85 nm, and 743 m2/g, respectively. However, the pore volume, average pore diameter, and surface area of ASC were 0.26 cm3/g, 2.66 nm, and 526.3 m2/g, respectively. It indicates that the pore diameter of catalyst decreased after impregnation with SbCl5; the active component loaded on the inner surface of the pore in AC was possibly the reason. Therefore, the pore volumes, average pore diameter, and surface areas were all decreased after impregnation.

View Article: PubMed Central - PubMed

ABSTRACT

Liquefaction residue of Heishan bituminous coal (HLR) was subject to two hydroconversion reactions under 5&thinsp;MPa initial pressure of hydrogen at 300&deg;C for 3&thinsp;h, without catalyst and with acid supported catalyst (ASC), respectively. The reaction products were analyzed with gas chromatography/mass spectrometer (GC/MS). The results show that 222 organic compounds were detected totally in the products and they can be divided into alkanes, aromatic hydrocarbons (AHCs), phenols, ketones, ethers, and other species (OSs). The yield of hydroconversion over the ASC is much higher than that without catalyst. The most abundant products are aromatic hydrocarbons in the reaction products from both catalytic and noncatalytic reactions of HLR. The yield of aromatic hydrocarbons in the reaction product from hydroconversion with the ACS is considerably higher than that from hydroconversion without a catalyst.

No MeSH data available.