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Studying the Effect of the Process Temperature on the Degree of Bio-Oil Hydrotreatment at Low Hydrogen Contents over NiCu–SiO 2 Catalyst with a High Metal Loading
Catalysis in Industry Pub Date : 2019-05-17 , DOI: 10.1134/s2070050419010094
A. A. Smirnov , M. V. Alekseeva , O. A. Bulavchenko , V. A. Yakovlev

Abstract

The hydrotreatment of pyrolysis bio-oil by hydrodeoxygenation at 6.0 MPa initial hydrogen pressure in the temperature range of 150–350°C and the presence of a NiCu–SiO2 catalyst synthesized using the sol-gel method is studied. The stability of the catalyst including the agglomeration of active component particles and the deposition of carbon on its surface is also investigated. It is shown that the content of oxygen in the products of the hydrotreatment of lignocellulose pyrolysis liquid decreases from 37 to 15 wt % upon an increase in the process temperature. Using a CHNS-O-analyzer, it is established that the amount of coke on the catalyst’s surfaces at a temperature of 350°C decreases by 4 times, compared with that formed at 150°C. X-ray diffraction shows that increasing the process temperature results in the gradual agglomeration of particles with a subsequent reduction in their size at high temperatures due to the dissolution of active catalyst components in the reaction medium.


中文翻译:

高金属负载NiCu-SiO 2催化剂上工艺温度对低氢含量生物油加氢程度的影响研究

摘要

在150–350°C的温度范围内,在初始氢气压力为6.0 MPa且存在NiCu–SiO 2的条件下,通过加氢脱氧对热解生物油进行加氢处理研究了使用溶胶-凝胶法合成的催化剂。还研究了催化剂的稳定性,包括活性成分颗粒的团聚和碳在其表面上的沉积。结果表明,随着过程温度的升高,木质纤维素热解液的加氢处理产物中的氧含量从37wt%降低至15wt%。使用CHNS-O分析仪,可以确定在350°C的温度下,催化剂表面的焦炭含量与在150°C的温度相比减少了4倍。X射线衍射表明,由于活性催化剂组分在反应介质中的溶解,提高过程温度导致颗粒逐渐附聚,并且在高温下其尺寸随后减小。
更新日期:2019-05-17
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