流体催化裂解 (FCC) 过程中金属污染物的迁移和排放特性
Jiawei Bian1, Bohan Wang2, Ximing Niu3
1State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
Journal of hazardous materials
|October 16, 2023
概括
流体催化裂解 (FCC) 原料中的金属污染物迁移到催化剂,影响排放. 了解金属迁移和催化剂再生是减少炼油厂颗粒物污染的关键.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
- 石油精炼 石油精炼 石油精炼
背景情况:
- 流体催化裂变 (FCC) 对于炼油厂的重油转化至关重要.
- 原材料中的金属污染物沉积在FCC催化剂上,导致失活和颗粒物 (PM) 排放.
- 这些金属污染物的迁移和排放特征仍然不太清楚.
研究的目的:
- 在FCC单位中调查金属从原料到催化剂的迁移.
- 量化FCC单位的金属颗粒物 (PM) 排放量.
- 为了阐明金属分布在耗尽的催化剂和PM排放之间的关系.
主要方法:
- 在三个FCC单元上进行了堆积测试,以监测金属PM排放.
- 分析了原料油和使用过的FCC催化剂中的金属含量.
- 使用堆数据计算金属PM的排放因子和比率因子.
主要成果:
- (Ni),铁 (Fe) 和 (V) 呈现出高度和从原料到催化剂的迁移率.
- 在已耗尽的催化剂上金属的分布显著影响金属到烟气的流动性.
- 催化剂再生过程会影响消耗,导致金属PM排放的变化.
- (V) 在较深的催化剂层中显示出较低的迁移和排放度,而颗粒外表面的 (Ni) 则相比较低.
结论:
- 这项研究有助于更好地理解FCC单位内的金属迁移动态.
- 这些发现为改进对炼油厂金属污染物排放的估计提供了基础.
- 描述金属分布和再生影响对于控制炼油厂排放至关重要.
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