HIDRODENITRIFIKACIJA, HIDROGENACIJA, HIDRODEOKSIGENACIJA IN HIDROKREKING MAŠČOBNIH AMIDOV: DOLOČITEV MEHANIZMOV, KINETIKE IN TRANSPORTNIH POJAVOV

Bačar, Vid (author), Likozar, Blaž (mentor)

Kinetiko hidrodenitrifikacije palmitamida smo opisali na sulfidiranem katalizatorju NiMo/γ-Al2O3, ki vključuje prenos mase iz plina v tekočino in iz tekočine na površino v šaržnem reaktorju pri različnih temperaturah (250–290 °C), tlaku (30–70 barov) ter atmosferah H2 in N2 s katalizatorjem in brez njega. Razvit je bil reakcijski sistem s 23 različnimi reakcijami s poudarkom na glavnih vmesnih produktih (palmitinska kislina, heksadekan-1-amin), ki so bili preučeni za boljše razumevanje sistema. Model predstavlja prvi tovrstni matematično mehanistični opis procesa, pojasnjuje vlogo vode in amonijaka v sistemu ter mehanizme za nastanek dimerov. Reakcije so močno odvisne od temperature tako v prisotnosti kot odsotnosti vodika. Za potrditev predpostavk in opisa sistema smo uporabili naslednje metode karakterizacije: SEM-EDX, XRD, STEM, TPD-MS, BET, TPR in TPO ter GC-MS.

• Language: Slovenian
• Keywords: hidrodenitrifikacija, maščobni amidi, kataliza, NiMoS
• Work type: Master's thesis/paper
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2024
• PID: 20.500.12556/RUL-158522
• Publication date in RUL: 14.06.2024

Secondary language

• Language: English
• Title: HYDRODENITRIFICATION, HYDROGENATION, HYDRODEOXYGENATION AND HYDROCRACKING OF FATTY AMIDES: DETERMINATION OF MECHANISMS, KINETICS AND TRANSPORT PHENOMENA

Abstract

The kinetics of palmitamide hydrodenitrification has been described on a sulphidated NiMo/γ-Al2O3 catalyst involving gas-to-liquid and liquid-to-surface mass transfer in a batch reactor at different temperatures (250–290 °C), pressures (30–70 bar) and H2 and N2 atmospheres with and without catalyst. A reaction system with 23 different reactions was developed, focusing on the main intermediates (palmitic acid, hexadecane-1-amine), which were studied to better understand the system. The model represents the first of its kind mathematical mechanistic description of the process, explaining the role of water and ammonia in the system and the mechanisms for the formation of the dimers. The reactions are strongly temperature dependent both in the presence and absence of hydrogen. The following characterisation methods were used to confirm the assumptions and the description of the system: SEM-EDX, XRD, STEM, TPD-MS, BET, TPR and TPO and GC-MS.

• Keywords: hydrodenitrification, fatty amides, catalysis, NiMoS