التفاصيل البيبلوغرافية
العنوان: |
Optimizing hydrodesulfurization of naphtha using NiMo/graphene catalyst. |
المؤلفون: |
Alwan, Hameed Hussein, Abd, Ammar Ali, Makki, Hasan F., Othman, Mohd Roslee |
المصدر: |
Journal of Industrial & Engineering Chemistry; Jul2024, Vol. 135, p539-551, 13p |
مصطلحات موضوعية: |
DESULFURIZATION, NAPHTHA, GRAPHENE, CATALYSTS, RESPONSE surfaces (Statistics) |
مستخلص: |
[Display omitted] • Innovative NiMo catalyst on graphene from date syrup for Naphtha hydrodesulfurization. • 5 wt% nickel, 15 wt% molybdenum precisely loaded in catalyst synthesis. • Catalyst characterization confirms successful impregnation of specified metals. • NiMo/graphene catalyst excels, achieving 97.7% desulfurization efficiency. • RSM identifies optimal conditions: 1.8 MPa H2 pressure, 600 K temperature, 3 h−1 space velocity. This paper reports results of optimizing naphtha hydrodesulfurization (HDS) using NiMo/graphene catalyst as an alternative to the conventional CoMo/Al2O3 catalyst that has been widely used in the industry. The objectives of this study are to formulate the NiMo/graphene catalyst and to evaluate its efficacy in sulphur removal during HDS. The catalyst exhibited a noticeable transformation from amorphous to crystalline structure, as confirmed by XRD analysis. The experiments were conducted in a fixed-bed reactor, and the effects of reaction temperature, space velocity, and hydrogen pressure on sulphur removal were studied. The findings demonstrate that increasing the reaction temperature from 520 K to 600 K resulted in a substantial decrease in sulphur level in the product by 32.5 % when operating at a space velocity of 6 h−1. Increasing the hydrogen pressure from 1 MPa to 1.85 MPa resulted in sulphur content reduction in the product by 97.12 % at constant temperature of 600 K. Conversely, space velocity was inversely proportional to the sulphur removal at fixed temperature and hydrogen pressure. A response surface methodology and desirability function were employed to identify the optimal operating conditions. During optimization, desulfurization efficiency of 97.7 % was achieved when hydrogen pressure of 1.8 MPa, reaction temperature of 600 K, and space velocity of 3 h−1 were applied during HDS. There was an increase of 12.6 % from the industrial catalyst for naphtha HDS. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Industrial & Engineering Chemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
قاعدة البيانات: |
Supplemental Index |