College of Chemistry, Zhengzhou University, 450001, Zhengzhou, Henan, China.
School of Ecology and Environment, Zhengzhou University, 450001, Zhengzhou, Henan, China.
Chem Biodivers. 2024 Jun;21(6):e202400150. doi: 10.1002/cbdv.202400150. Epub 2024 Apr 17.
Experiments were conducted in this study on the co-hydropyrolysis of three components of biomass (cellulose, hemicellulose, and lignin) and HDPE by using SR-Pd/Trap-HZ-5 as catalyst. To control the variable, we use the same experiment conditions in co-hydropyrolysis: Si/Al ratio of 50, Pd load 1 %, catalyst to reactant ratio of 1 : 10, 1 MPa, 400 °C, reaction time 1 h. Use XRD, TEM, BET, and NH-TPD to confirm catalyst successful synthesis; use pine sawdust (PW) co-hydropyrolysis with HDPE to analyse catalytic activity; and use GC/MS to characterize the chemical composition of the bio-oil from the co-hydropyrolysis of biomass components and HDPE. The results show that cellulose has a significant synergistic effect with aromatic hydrocarbon production, whose selectivity was 93.3 %; hemicellulose has a synergistic effect; aromatic selectivity can reach 75.1 %; and a negative synergistic effect between lignin and HDPE was shown as the selectivity of aromatic hydrocarbons decreased from 62.1 % to 15.6 %.
本研究采用 SR-Pd/Trap-HZ-5 催化剂，对生物质的三种组分（纤维素、半纤维素和木质素）与 HDPE 的共热解进行了实验。为了控制变量，我们在共热解中使用相同的实验条件：Si/Al 比为 50，Pd 负载量为 1%，催化剂与反应物的比例为 1:10，1 MPa，400°C，反应时间 1 h。采用 XRD、TEM、BET 和 NH-TPD 来确认催化剂的成功合成；采用松木屑（PW）与 HDPE 共热解来分析催化活性；并采用 GC/MS 来对生物质组分和 HDPE 的共热解生物油的化学成分进行分析。结果表明，纤维素与芳烃的生成具有显著的协同作用，其选择性为 93.3%；半纤维素具有协同作用，芳烃的选择性可达 75.1%；而木质素与 HDPE 之间存在负协同作用，芳烃的选择性从 62.1%下降到 15.6%。
