Citation: SUN Zhi-Guo, GAO Xiong-Hou, MA Jian-Tai, ZHANG Li, LIU Hong-Hai, WANG Bao-Jie. Effect of Lauryl Sodium Sulfate on the In situ Crystallization of Small-Grain NaY[J]. Acta Physico-Chimica Sinica, ;2015, 31(10): 2011-2015. doi: 10.3866/PKU.WHXB201508211 shu

Effect of Lauryl Sodium Sulfate on the In situ Crystallization of Small-Grain NaY

1.
1 Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, P. R. China;
2 College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China

Received Date: 23 June 2015
Available Online: 21 August 2015
Fund Project: 中国石油天然气有限公司项目(2014A-2108)资助 (2014A-2108)

The in situ crystallization of small-grain NaY in the presence of lauryl sodium sulfate was investigated. The product containing small-grain NaY was used as a matrix to prepare REUSY catalyst via ammonium ion exchange and rare earth ion exchange. X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence (XRF), and N₂ physical adsorption-desorption were used to characterize the samples, while the catalytic performance of prepared catalysts was evaluated by micro-activity evaluation device and advanced catalytic evaluation (ACE). It is indicated that the addition of lauryl sodium sulfate (5% of Kaolin microsphere mass) to in situ crystallization system can decrease the average grain size of the zeolite from 540 to 250 nm. Relative to the conventional in situ crystallization fluid catalytic cracking (FCC) catalysts, the catalyst prepared from in situ crystallization product containing small-grain NaY exhibits improved performance in the conversion rate of feedstock, the selectivity of the cracking product, and the resistance to carbon deposition.
- Small grain NaY,
- In situ crystallization,
- Lauryl sodium sulfate,
- Heavy oil,
- Fluid catalytic cracking
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