Optimization of kerosene from a one-step catalytic hydrogenation of castor oil over Pt-La/SAPO-11 by response surface me
- PDF / 2,173,249 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 34 Downloads / 155 Views
ORIGINAL ARTICLE
Optimization of kerosene from a one-step catalytic hydrogenation of castor oil over Pt-La/SAPO-11 by response surface methodology Wenjie Zhang 1 & Yubao Chen 1 & Xingyong Li 1 & Shijie Liu 2 & Liangdong Hu 1 & Shiyun Zhuang 1 & Qiang Wang 1 & Zhi Yang 1 Received: 8 July 2020 / Revised: 2 October 2020 / Accepted: 22 October 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract A one-step continuous catalyzed hydrogenation preparation of bioaviation kerosene was prepared from castor oil with a molecular probe in a high-pressure microfixed bed. The catalyst was Pt-La/SAPO-11, which was synthesized by the impregnation of Pt, as the active metal component, and metal auxiliaries. The effect of adding metal auxiliaries into the bifunctional metal was evaluated by XRD, XRF, BET, TEM, and Py-IR techniques, and it was confirmed that the hydrodeoxygenation performance, the selectivity of C8–C16 alkanes, the selectivity of C8–C16 isoalkanes, and the selectivity of C8–C16 arenes were all improved. Combined with a Box-Behnken central composite design, the reaction temperature, pressure, liquid hourly space velocity (LHSV), and hydrogen/oil ratio (hydrogen volume/castor oil volume) were selected as the four critical factors for the three levels of selectivity. The response surface method (RSM) was selected to establish a mathematical model with a second-order quadratic equation and optimize the process parameters for enhancing the selectivity of C8–C16 alkanes. The optimization conditions of the four process parameters were found to be a temperature of 405 °C, a pressure of 3.9 MPa, an LHSV of 0.93 h−1, and a hydrogen/ oil ratio of 990 NmL mL−1. Three verification experiments showed that the selectivity of C8–C16 alkanes was 58.76%. Keywords C8 . C16 alkanes . Pt/SAPO-11 catalyst . Metal auxiliaries . Aviation kerosene . Response surface method
1 Introduction The impact of turmoil in the oil market caused by nCoV-EMC in recent months has led to the oil market experiencing a massive slump worldwide. Therefore, the development of new energy products has become an imperative necessity [1, 2]. Biomass as an alternative to fossil fuels can reduce not only greenhouse gas emissions but also the burden on the stressed aviation industry [3]. The main component of vegetable oil is a triglyceride with C12–C24 fatty acid chains, which can be converted to C11–C24 isoalkane by hydrogenation, deoxidation, and isomerization reactions [4–10]. The general method for the hydrodeoxygenation of the unsaturated fatty acids of
* Yubao Chen [email protected] 1
College of Energy and Environment Science, Yunnan Normal University, Kunming, Yunnan 650500, People’s Republic of China
2
Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY 13210, USA
vegetable oil is the two-step method. The first step is the conversion of the unsaturated fatty acids from vegetable oils to saturated alkanes over a sulfide Ni–Mo/Al2O3, Ni–W/Al2O3, or CoMo/Al2O3 catalyst [11–16]. The sec
Data Loading...
