Enhanced hydrogenation of aromatic rings and hydrocracking of >CarO bridged bonds in the extraction residue from Piliqing subbituminous coal over a magnetic difunctional solid superbase

Publication date: Available online 21 September 2019Source: Journal of Analytical and Applied PyrolysisAuthor(s): Mei-Ling Xu, Xian-Yong Wei, Qi-Cong Wu, Yun-Peng Zhao, Feng-Hai Li, Guang-Hui Liu, Fang-Jing Liu, Zhi-Min Zong, Min Zhang, Sheng Li, Xing Fan, Wei Zhao, Feng-Yun Ma, Wen-Long Mo, Jing-Mei LiuAbstractNi-Mg2Si/attapulgite powder (AP) was prepared by thermally decomposing nickel tetracarbonyl onto the as-synthesized Mg2Si/AP by impregnating Mg2Si onto AP in CCl4. Its catalytic performance was evaluated by the catalytic hydroconversion (CHC) of oxydibenzene (ODB) in n-hexane under different reaction conditions. Both ODB conversion and cyclohexane selectivity are 100 % by the CHC of ODB over Ni-Mg2Si/AP under 3 MPa of initial hydrogen pressure at 240 °C for 4 h. However, almost no ODB was converted without Ni-Mg2Si/AP under the same conditions. The results show that Ni-Mg2Si/AP could activate H2 to biatomic active hydrogen (H⋯H) and H−, resulting in the hydrogenation of aromatic rings (ARs) and the hydrocracking of>CarO bridged bonds (COBBs), respectively. Additionally, the catalyst was also successfully applied in the CHC of extraction residue (ER) from Piliqing subbituminous coal (PSBC) in n-hexane. The group components of the soluble portion (SP) from CHC and non-CHC (NCHC) (SPCHC and SPNCHC) of ER were analyzed with a gas chromatograph/mass spectrometer. The yield (36.4 %) of SPCHC is significantly higher than that (1.8 %) of SPNCHC. More alkyl-substitut...

Source: Journal of Analytical and Applied Pyrolysis - January 15, 2020 Category: Chemistry Source Type: research