无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2025, Vol. 57 ›› Issue (8): 117-122.doi: 10.19964/j.issn.1006-4990.2024-0434

• 催化材料 • 上一篇    下一篇

硼、磷改性氧化铝的制备及其在催化裂化中的应用研究

熊晓云1(), 穆林波2, 杜学敏3, 胡清勋1   

  1. 1.中国石油,石油化工研究院兰州化工研究中心,甘肃 兰州 730060
    2.中国石油兰州石化公司,甘肃 兰州 730060
    3.中国石油庆阳石化公司,甘肃 庆阳 745002
  • 收稿日期:2024-08-02 出版日期:2025-08-10 发布日期:2024-11-19
  • 作者简介:熊晓云(1980— ),男,博士,高级工程师,主要研究方向为催化裂化催化剂研究与开发;E-mail:xiongxiaoyun@petrochina.com.cn
  • 基金资助:
    中国石油基础研究专项(2023ZZ36)

Study on boron and phosphorus modified of alumina oxide and its application in catalytic cracking

XIONG Xiaoyun1(), MU Linbo2, DU Xuemin3, HU Qingxun1   

  1. 1.Lanzhou Petrochemical Research Center,Petrochemical Research Institute,PetroChina,Lanzhou 730060,China
    2.PetroChina Lanzhou Petrochemical Company,Lanzhou 730060,China
    3.PetroChina Qingyang Petrochemical Company,Qinyang 745002,China
  • Received:2024-08-02 Published:2025-08-10 Online:2024-11-19

摘要:

针对催化裂化重油转化过程中焦炭产率高的问题,开展了催化裂化催化剂氧化铝的改性研究以提升重油转化率并抑制焦炭生成。分别通过硼酸和磷酸氢二铵对拟薄水铝石进行了浸渍改性,制备了改性氧化铝Al2O3-B和Al2O3-P。通过X射线衍射(XRD)、N2吸-脱附、NH3-程序升温脱附(NH3-TPD)和吡啶-红外(Py-IR)等技术手段对样品的晶体结构、内部孔隙结构、酸量和酸强度进行了表征。结果显示,与未改性的Al2O3-0相比,Al2O3-B、Al2O3-P孔体积和比表面积下降,最可几孔径变小,但其热稳定性提高,经950 ℃焙烧后样品的比表面积保留率提高了15%以上;改性后Al2O3-B的酸量增加,Al2O3-P的酸量略微降低,但Al2O3-B和Al2O3-P的弱酸及L酸强度均降低。对采用Al2O3-0、Al2O3-B、Al2O3-P分别制备的催化裂化催化剂进行了反应性能评价。结果显示,与CAT-1相比,CAT-2重油产率降低0.92%,焦炭产率降低0.55%,总液收增加1.46%;与CAT-1相比,CAT-3重油产率增加0.32%,焦炭产率降低0.78%,总液收增加0.48%。相对于CAT-1,CAT-2和CAT-3具有重油转化能力强,焦炭产率低的特点。对比Al2O3-P,Al2O3-B对应催化剂具有更高的总液收。

关键词: 氧化铝, 硼改性, 磷改性, 催化裂化, 焦炭

Abstract:

A study was conducted on the modification of alumina oxide to meet the requirements of catalytic cracking heavy oil conversion and reducing coke yield.Al2O3-B and Al2O3-P were obtained by impregnation modification of pseudo boehmite with boric acid and diammonium hydrogen phosphate.The crystal structure,pore structure,acid amount,and acid strength of the samples were characterized using techniques such as X-ray diffraction(XRD),N2 adsorption-desorption,NH3-temperature-programmed desorption(NH3-TPD),and pyridine-infrared spectroscopy(Py-IR).The results showed that compared with unmodified Al2O3-0,although Al2O3-B and Al2O3-P exhibited reduced pore volume,specific surface area,and smaller most probable pore size,their thermal stability was improved.After calcination at 950 ℃,the specific surface area retention rate was increased by more than 15%.The acid amount was increased for Al2O3-B but decreased for Al2O3-P,while the acid strength of both Al2O3-B andAl2O3-P were decreased.The catalytic performance of fluid catalytic cracking(FCC) catalysts prepared using Al2O3-0,Al2O3-B,and Al2O3-P was evaluated.Compared with CAT-1,CAT-2 showed a 0.92% decrease in heavy oil yield,a 0.55% reduction in coke yield,and a 1.46% increase in total liquid yield.In contrast,CAT-3 exhibited a 0.32% increase in heavy oil yield,a 0.78% decrease in coke yield,and a 0.48% rise in total liquid yield compared to CAT-1.Compared with CAT-1,CAT-2 and CAT-3 demonstrated stronger heavy oil conversion ability and lower coke yield.Furthermore,the Al2O3-B-based catalyst provided a higher total liquid yield than the Al2O3-P.

Key words: aluminum oxide, boron modification, phosphorus modification, catalytic cracking, coke

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