Selective hydroconversion of lignin-derived compounds over a Ni/ hydroxyapatite

被引:0
作者
Feng, Yong-Hui [1 ,2 ]
Bai, Xiang [3 ]
Wei, Xian-Yong [1 ,2 ,3 ,4 ]
Dilixiati, Yierxiati [3 ]
Li, Li [1 ,2 ]
Kong, Qian-Qian [1 ,2 ]
Li, Zhuang [1 ,2 ]
Fan, Zi-Chun [1 ,2 ]
Zhao, Ji [1 ,2 ]
Zong, Zhi-Min [1 ,2 ]
Wang, Jun-Long [3 ]
机构
[1] China Univ Min & Technol, Jiangsu Prov Engn Res Ctr Fine Utilizat Carbon Res, Xuzhou 221116, Jiangsu, Peoples R China
[2] China Univ Min & Technol, Minist Educ, Key Lab Coal Proc & Efficient Utilizat, Xuzhou 221116, Jiangsu, Peoples R China
[3] Yili Normal Univ, Key Lab Chem & Chem Engn Heavy Carbon Resources, Yining 835000, Xinjiang, Peoples R China
[4] China Univ Min & Technol, Xuzhou 221116, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
Ni/HAP; Lignin-derived compounds; Hydroconversion; Cyclanes; Cyclohexanol; MODEL COMPOUNDS; HYDRODEOXYGENATION; HYDROGENOLYSIS; CONVERSION; BONDS; ETHER;
D O I
10.1016/j.fuel.2024.131403
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Catalytic hydroconversion (CHC) of lignin-derived compounds (LDCs) to cyclanes and cyclohexanol (CHII) promotes the value-added utilization of LDCs. Nevertheless, designing a highly active and selective catalyst for this purpose remains a challenge. Herein, Ni/hydroxyapatite (HAP) was fabricated by a slightly modified deposition-precipitation approach and employed for the CHC of benzyloxybenzene (BOB) and phenethoxybenzene (PEOB) under different conditions. Consequently, BOB was fully converted with CHII and methylcyclohexane (MCH) as the main products (MPs) in the yield of 94.8 and 100 % under the optimum conditions of 20 mg Ni-15/HAP, 140 degrees C, 4 MPa H-2, and 4 h, while complete conversion of PEOB to CHII and ethylcyclohexane (ECH) as MPs proceeded under initial hydrogen pressure of 4 MPa at 180 degrees C for 4 h. In addition, other lignin-related model compounds can also be selectively hydrogenated to cyclanes and CHII, suggesting the high activity and selectivity of Ni-15/HAP. Meanwhile, based on the product distribution and Ni-15/HAP characterization, relevant mechanisms were proposed. Specifically, BOB conversion to CHII and MCH via the >CH-O- bond cleavage induced by H- addition, abstraction of H+ by the resulting phenoxy anion from the catalyst surface, and benzene ring hydrogenation, whereas conversion of PEOB to CHII and ECH was similar to BOB. Furthermore, Ni-15/HAP displays an excellent reusability.
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页数:9
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