炭黑模板法制备大孔原位晶化型催化裂化催化剂
收稿日期: 2022-11-07
网络出版日期: 2023-09-19
基金资助
中国石油重大工业试验项目(2021ZS12)
Preparation of macroporous in situ crystallized FCC catalyst by carbon black template method
Received date: 2022-11-07
Online published: 2023-09-19
通过在高岭土微球中分别引入两种型号的炭黑制备了NaY/高岭土复合微球，采用XRD、低温N2吸-脱附、SEM等分析方式进行了表征，并对改性后的催化剂进行了反应评价。研究显示，通过引入炭黑可有效提高NaY/高岭土复合微球的相对结晶度、介孔孔体积和介孔孔径。与常规方法相比，引入2%（炭黑质量占高岭土微球质量的分数）炭黑N990所制备的复合微球，其相对结晶度从26%增加到30%，介孔孔体积从0.212 cm3/g增加到0.320 cm3/g，介孔最可几孔径从4.3 nm增加到6.6 nm。催化剂评价结果显示，与常规方法相比，加入2%N990所制备的催化剂，油浆收率下降2.44%，总液收增加2.15%。相对于炭黑型号，炭黑的加入量对复合微球的介孔结构和催化剂反应性能影响更大，炭黑加入量增加到4%，复合微球的介孔孔体积下降，催化剂油浆收率上升。
熊晓云 , 曹庚振 , 杜学敏 , 王久江 , 胡清勋 . 炭黑模板法制备大孔原位晶化型催化裂化催化剂[J]. 无机盐工业, 2023 , 55(9) : 134 -139 . DOI: 10.19964/j.issn.1006-4990.2022-0658
The NaY/kaolin composite microspheres prepared by introducing two kinds of carbon black into the kaolin microspheres were characterized by XRD，low-temperature N2 adsorption-desorption and SEM，and the modified catalysts were evaluated.The results showed that the relative crystallinity，mesopore volume and mesopore diameter of NaY/kaolin composite microspheres could be effectively improved by introducing carbon black.Compared with the conventional method，the relative crystallinity of the composite microspheres prepared by introducing 2%（mass fraction of carbon black in kaolin microspheres）N990 was increased from 26% to 30%，the volume of mesopores was increased from 0.212 cm3/g to 0.320 cm3/g，and the most probable pore size of mesopores was increased from 4.3 nm to 6.6 nm.The catalyst evaluation results showed that compared with the conventional method，the oil slurry yield was decreased by 2.44% and the total liquid yield was increased by 2.15% when the catalyst was prepared with 2% N990 adding.Compared with the carbon black model，the adding amount of carbon black had a greater impact on the mesoporous structure of the composite microspheres and the reaction performance of the catalyst.With the increase of carbon black content to 4%，the mesoporous volume of the composite microspheres was decreased，and the yield of catalyst slurry was increased.
Key words： Kaolin; Y-type molecular sieve; carbon black; in situ crystallization; FCC
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