Tedstone Aleksander A, Bin Jumah Abdulrahman, Asuquo Edidiong, Garforth Arthur A
Department of Chemical Engineering and Analytical Science, University of Manchester, Oxford Road, Greater Manchester, M1 3BB, UK.
College of Engineering, King Saud University, PO Box 800, Riyadh 11421, Saudi Arabia.
R Soc Open Sci. 2022 Mar 16;9(3):211353. doi: 10.1098/rsos.211353. eCollection 2022 Mar.
Sulfided nickel, an established hydrocracking and hydrotreating catalyst for hydrocarbon refining, was synthesized on porous aluminosilicate supports for the hydrocracking of mixed polyolefin waste. Zeolite beta, zeolite 13X, MCM41 and an amorphous silica-alumina catalyst support were impregnated with the single-source precursor (SSP) nickel (II) ethylxanthate for catalyst support screening. Application of this synthesis method to beta-supported nickel (Ni@Beta), as an alternative to wet impregnation using aqueous nickel (II) nitrate, provided catalytic materials with higher conversion to fluid products at the same mild batch reaction conditions of 330°C with appropriate agitation and 20 bar H pressure. Mass balance quantification demonstrated that SSP-derived 5wt%Ni@Beta yielded a greater than 95 wt% conversion of a mixed polyolefin feed to fluid products, compared with 39.8 wt% conversion in the case of 5wt%Ni@Beta prepared by wet impregnation. Liquid and gas products were quantitatively analysed by gas chromatography-flame ionization detection (GC-FID) and gas chromatography-mass spectrometry (GC-MS), revealing a strong selectivity to saturated C (37.3 wt%), C (21.6 wt%) and C (12.8 wt%) hydrocarbons in the case of the SSP-derived catalyst.
硫化镍是一种成熟的用于烃类精炼的加氢裂化和加氢处理催化剂，它是在多孔硅铝酸盐载体上合成的，用于混合聚烯烃废料的加氢裂化。将β沸石、13X沸石、MCM-41和一种无定形硅铝催化剂载体用单源前驱体（SSP）乙基黄原酸镍（II）进行浸渍，以筛选催化剂载体。将这种合成方法应用于β沸石负载的镍（Ni@Beta），作为使用硝酸镍（II）水溶液进行湿浸渍的替代方法，在330°C、适当搅拌和20巴氢气压力的相同温和间歇反应条件下，提供了具有更高流体产物转化率的催化材料。质量平衡定量表明，与通过湿浸渍制备的5wt%Ni@Beta的39.8wt%转化率相比，由SSP衍生的5wt%Ni@Beta能使混合聚烯烃进料转化为流体产物的转化率大于95wt%。通过气相色谱-火焰离子化检测（GC-FID）和气相色谱-质谱（GC-MS）对液体和气体产物进行定量分析，结果表明，在由SSP衍生的催化剂的情况下，对饱和C（37.3wt%）、C（21.6wt%）和C（12.8wt%）烃具有很强的选择性。
