Jindal Meenu, Palla Venkata Chandra Sekhar, Thallada Bhaskar
Material Resource Efficiency Division, CSIR - Indian Institute of Petroleum, Dehradun 248005, Uttarakhand, India; Academy of Scientific and Innovative Research (AcSIR), Sector 19, Kamla Nehru Nagar, Ghaziabad 201002, Uttar Pradesh, India.
Material Resource Efficiency Division, CSIR - Indian Institute of Petroleum, Dehradun 248005, Uttarakhand, India; Academy of Scientific and Innovative Research (AcSIR), Sector 19, Kamla Nehru Nagar, Ghaziabad 201002, Uttar Pradesh, India.
Bioresour Technol. 2023 May;376:128933. doi: 10.1016/j.biortech.2023.128933. Epub 2023 Mar 20.
Zeolites, being acidic, act as the most promising catalytic materials for deoxygenating reactive oxygenated compounds produced during the pyrolysis of lignocellulosic biomass. Herein, two zeolites, HY and HZSM-5, with different Si/Al ratios, were employed to investigate the effect of zeolite structure on aromatic hydrocarbons (AHs) production during flash hydropyrolysis of cotton stalks (Temperature = 800 ˚C, H pressure = 10 bar). Both the zeolites enhanced AHs production. However, the pore structure and pore size of HZSM-5 marked a pronounced effect on the reduction of oxygenated compounds. With an increase in Si/Al ratio, AHs area% was found to decrease owing to the decrease in acidity. Ni/zeolite catalysts were also investigated to look into the effect of metal loading on the catalytic properties of zeolites. Ni/zeolite catalysts enhanced the aromatic and aliphatic hydrocarbon production by further conversion of phenolics and other oxygenated compounds due to the promotion of direct deoxygenation, decarbonylation and decarboxylation reactions.
沸石具有酸性，是用于对木质纤维素生物质热解过程中产生的活性氧化化合物进行脱氧的最有前景的催化材料。在此，采用两种具有不同硅铝比的沸石HY和HZSM-5，研究沸石结构对棉秆闪速加氢热解过程中芳烃（AHs）生成的影响（温度 = 800˚C，氢气压力 = 10 bar）。两种沸石均提高了芳烃的生成量。然而，HZSM-5的孔结构和孔径对含氧化合物的减少有显著影响。随着硅铝比的增加，由于酸度降低，芳烃面积百分比下降。还研究了镍/沸石催化剂，以考察金属负载量对沸石催化性能的影响。镍/沸石催化剂通过促进直接脱氧、脱羰和脱羧反应，进一步将酚类和其他含氧化合物转化，从而提高了芳烃和脂肪烃的产量。
