Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
J Environ Manage. 2022 Dec 15;324:116392. doi: 10.1016/j.jenvman.2022.116392. Epub 2022 Oct 5.
The main objective of the current work is to investigate the effect of nickel-waste chicken eggshell modified Hydrogen exchanged Zeolite Socony Mobil-5 (Ni-WCE/HZSM-5) on pyrolysis of high-density polyethylene (HDPE). Ni-WCE/HZSM-5 was synthesized via the impregnation incipient wetness (IWI) method with Ni and WCE mass loading of 4 and 12 wt% respectively. HZSM-5, CaO, WCE, WCE/HZSM-5, and Ni/HZSM-5 were prepared for comparison purposes with Ni-WCE/HZSM-5. All the synthesized catalysts were characterized for phase analysis, metal loading, surface morphology, and textural properties. The impregnation of nickel and WCE had significantly affected the original framework of HZSM-5, where the crystallinity percentage and average crystal size of HZSM-5 dropped to 44.97% and increased to 47.90 nm respectively. The surface morphology of HZSM-5 has drastically changed from a cubic-like shape into a spider web-like surface after the impregnation of WCE. The BET surface area of HZSM-5 has been lowered due to the impregnation of nickel and WCE, but the total pore volume has increased greatly from 0.2291 cm/g to 0.2621 cm/g. The catalyst performance was investigated in the pyrolysis of HDPE via a fixed bed reactor and the pyrolysis oil was further analysed to evaluate the distribution of C to C> hydrocarbons. Among the tested catalytic samples, the highest pyrolysis oil yield was achieved by WCE (80%) followed by CaO (78%), WCE/HZSM-5 (63%), HZSM-5 (61%), Ni/HZSM-5 (44%) and Ni-WCE/HZSM-5 (50%). For hydrocarbon distribution in pyrolysis oil, the Ni/HZSM-5 produced the highest of total C and C hydrocarbons at 12% and 27% respectively followed by WCE/HZSM-5 (4% and 20%), non-catalytic (5% and 13%), Ni-WCE/HZSM-5 (0% and 15%), WCE (0% and 10%), HZSM-5 (0% and 6%) and CaO (0% and 0%).
本工作的主要目的是研究镍废鸡蛋壳修饰的氢交换丝光沸石索科尼 Mobil-5（Ni-WCE/HZSM-5）对高密度聚乙烯（HDPE）热解的影响。Ni-WCE/HZSM-5 通过浸渍初始湿度（IWI）法合成，镍和 WCE 的负载量分别为 4 和 12 wt%。为了进行比较，制备了 HZSM-5、CaO、WCE、WCE/HZSM-5 和 Ni/HZSM-5。所有合成的催化剂均进行了物相分析、金属负载、表面形貌和结构性能表征。镍和 WCE 的浸渍显著影响了 HZSM-5 的原始骨架，其中 HZSM-5 的结晶度百分比和平均晶粒尺寸分别降至 44.97%和增至 47.90nm。WCE 浸渍后，HZSM-5 的表面形貌从立方形状急剧变为蜘蛛网状。由于镍和 WCE 的浸渍，HZSM-5 的 BET 表面积降低，但总孔体积从 0.2291cm/g 大幅增加至 0.2621cm/g。通过固定床反应器研究了催化剂在 HDPE 热解中的性能，并进一步分析了热解油，以评估 C 至 C>烃的分布。在所测试的催化样品中，WCE（80%）的热解油产率最高，其次是 CaO（78%）、WCE/HZSM-5（63%）、HZSM-5（61%）、Ni/HZSM-5（44%）和 Ni-WCE/HZSM-5（50%）。对于热解油中的烃类分布，Ni/HZSM-5 产生的总 C 和 C 烃的含量最高，分别为 12%和 27%，其次是 WCE/HZSM-5（4%和 20%）、非催化（5%和 13%）、Ni-WCE/HZSM-5（0%和 15%）、WCE（0%和 10%）、HZSM-5（0%和 6%）和 CaO（0%和 0%）。
