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Ni-Co/HZSM-5催化剂在模拟生物油升级中促进芳烃化合物生成的催化性能。

Catalytic performance of Ni-Co/HZSM-5 catalysts for aromatic compound promotion in simulated bio-oil upgrading.

作者信息

Qin Liyuan, Li Jiani, Zhang Shengming, Liu Zhongyuan, Li Shuang, Luo Lina

机构信息

College of Engineering, Northeast Agricultural University Harbin 150030 China

Key Laboratory of Pig-breeding Facilities Engineering, Ministry of Agriculture and Rural Affairs Harbin 150030 China.

出版信息

RSC Adv. 2023 Mar 8;13(11):7694-7702. doi: 10.1039/d2ra07706j. eCollection 2023 Mar 1.

DOI:10.1039/d2ra07706j
PMID:36908530
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9993240/
Abstract

Bio-oil can be used as a substitute for fossil fuels after it is upgraded. Bimetal-modified HZSM-5 catalysts with various Ni-to-Co ratios were prepared to address catalysis problems, including deactivation of the catalysts and low hydrocarbon yields. The catalytic performance of Ni-Co/HZSM-5 in upgrading the simulated bio-oil was investigated with a fixed-bed reactor, and the influence of the loaded duplex metal ratio was also discussed. The new moderately strong/strong acid sites of Ni-Co/HZSM-5 changed according to the Ni/Co loading ratios, which substantially affected the acidity, catalytic activity and selectivity of the Ni-Co/HZSM-5. However, incorporating Co and Ni into the zeolite did not alter the structure of the HZSM-5. The interactions of the loaded bimetallic oxides reached equilibrium in 6Ni-4Co/HZSM-5, in which moderately strong acid sites and strong acid sites were formed after loading with CoO and NiO. With a suitable acid site ratio, 6Ni-4Co/HZSM-5 exhibited excellent performance, with a lower coke deposition of 3.29 wt% and stable catalytic activity, and the conversion remained at 83-73% during 360 min of uninterrupted catalysis. Periodic changes in the acid sites and interfacial protons were the critical factors that improved the properties of the 6Ni-4Co/HZSM-5 and enhanced its selectivity for aromatic compounds.

摘要

生物油升级后可作为化石燃料的替代品。制备了具有不同镍钴比的双金属改性HZSM-5催化剂，以解决催化问题，包括催化剂失活和低碳氢产率。采用固定床反应器研究了Ni-Co/HZSM-5对模拟生物油升级的催化性能，并讨论了负载双金属比例的影响。Ni-Co/HZSM-5新的中强酸/强酸位点随Ni/Co负载比的变化而变化，这对Ni-Co/HZSM-5的酸度、催化活性和选择性有显著影响。然而，将Co和Ni引入沸石并没有改变HZSM-5的结构。负载的双金属氧化物在6Ni-4Co/HZSM-5中达到相互作用平衡，负载CoO和NiO后形成了中强酸位点和强酸位点。在合适的酸位点比例下，6Ni-4Co/HZSM-5表现出优异的性能，焦炭沉积量较低，为3.29 wt%，催化活性稳定，在360分钟的连续催化过程中转化率保持在83-73%。酸位点和界面质子的周期性变化是改善6Ni-4Co/HZSM-5性能并提高其对芳烃化合物选择性的关键因素。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/ce8133038518/d2ra07706j-f10.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/3963470c8ff5/d2ra07706j-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/7dda185e6788/d2ra07706j-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/ce8133038518/d2ra07706j-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/7c08993ffeb5/d2ra07706j-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/61dbb795d2bb/d2ra07706j-f2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/cd63f2fad3b2/d2ra07706j-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/52d756eae6e8/d2ra07706j-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/2f6bf2ed3a43/d2ra07706j-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/3963470c8ff5/d2ra07706j-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/7dda185e6788/d2ra07706j-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f89/9993240/ce8133038518/d2ra07706j-f10.jpg

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