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首页> 外文期刊>RSC Advances >Beneficial use of ultrasound irradiation in synthesis of beta-clinoptilolite composite used in heavy oil upgrading process
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Beneficial use of ultrasound irradiation in synthesis of beta-clinoptilolite composite used in heavy oil upgrading process

机译：超声辐照在重油升级过程中使用的β-临床化合物合成中的有益用途

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摘要

A novel beta-clinoptilolite composite was prepared from beta zeolite and alkaline treated clinoptilolite by employing conventional and sonicated mixing procedures. Parent and prepared catalysts were characterized by XRD, FE-SEM, N2 adsorption-desorption and NH3-TPD analyses. Prepared composite of beta zeolite and treated clinoptilolite exhibited improved structural properties especially upon sonicated mixing procedure. Employing ultrasound irradiation notably improved beta distribution in the composite and increased mesoporous volume and specific surface area from 0.245 cm3 g 1 and 171.3 m2 g 1 in conventionally mixed composite to 0.353 cm3 g 1 and 232.9 m2 g 1 in sonicated sample. Catalytic performance of prepared composite was evaluated in heavy oil upgrading process in a continuous fixed bed apparatus. Liquid product was specified by conducting SIMDIS-GC and GC/ MS analyses. Spent catalysts were characterized by TGA, FTIR and XRD. Beta-clinoptilolite composite containing only 30 wt% of beta zeolite, exhibited similar performance to beta zeolite catalyst by resulting 75.3% viscosity reduction while producing lower amount of coke. Amount of light hydrocarbons produced over beta-clinoptilolite composite was 33.51 wt% while beta zeolite catalyst produced 35.58 wt% light hydrocarbons in upgrading process. Ultrasound irradiated composite showed more stable structure in catalytic cracking procedure compared to conventionally mixed composite. After 5 h time on stream, relative crystallinity of clinoptilolite phase in the conventionally mixed composite was reduced by 34.5% while sonicated sample remarkably preserved its structure during the reaction and only 1% reduction occurred for this sample.
机译：一种新型的β-斜发沸石复合体从β沸石制备和碱性通过采用常规处理的斜发沸石，并超声处理混合程序。母体而制得的催化剂进行了表征通过XRD，FE-SEM，N2吸附 - 脱附和NH3-TPD分析。 β沸石的制备的复合和处理的斜发沸石具有改进的尤其在超声处理混合程序结构特性。采用超声辐射在复合显着改善β分布，并超声处理样品中常规混合复合增加孔体积和比表面积从0.245立方厘米克1和171.3平方米克1至0.353立方厘米克1和232.9平方米克1。制备的复合材料的催化性能在重油改质的过程，评价在连续固定床装置。通过进行SIMDIS-GC和GC指定液体产物/ MS分析。通过TGA，FTIR和XRD的废催化剂进行了表征。 β-斜发沸石复合只含有30β沸石的重量％，通过所得的75.3％的粘度降低，同时产生焦炭的较低量的表现出类似的性能的β沸石催化剂。过β-内斜发沸石的复合产生的光的烃量为33.51％（重量），而β沸石催化剂在升级过程中产生的35.58重量％的轻质烃。超声相比常规混合复合在催化裂化过程照射复合体表明更稳定的结构。 5小时时间流之后，在常规的混合复合斜发沸石相的相对结晶度减少了34.5％，而样品超声处理在反应过程中显着地保留了其结构和发生对于此示例只减少1％。

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  • 来源
    《RSC Advances》 |2019年第29期|共15页
  • 作者

    Safari Sahar; Khoshbin Reza; Karimzadeh Ramin;

  • 作者单位

    Tarbiat Modares Univ Fac Chem Engn POB 14115-114 Tehran Iran;

    Buein Zahra Tech Univ Dept Chem &

    Mat Engn Buein Zahra Qazvin Iran;

    Tarbiat Modares Univ Fac Chem Engn POB 14115-114 Tehran Iran;

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  • 正文语种 eng
  • 中图分类 化学;
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