کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6593132 | 1423367 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface chemical characterization of deactivated low-level mercury catalysts for acetylene hydrochlorination
ترجمه فارسی عنوان
خصوصیات شیمیایی سطحی از کاتالیست های جیوه با درجه پایین غیر فعال برای هیدروکلرنج استیلن
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کلمات کلیدی
کاتالیزور، کربن فعال، غیرفعال کردن، کلرید ممتاز هیدروکلرین استیلن، رسوب کربن،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Mercury-containing catalysts are widely used for acetylene hydrochlorination in China. Surface chemical characteristics of the fresh low-level mercury catalysts and spent low-level mercury catalysts were compared using multiple characterization methods. Pore blockage and active site coverage caused by chlorine-containing organics are responsible for catalyst deactivation. The reactions of chloroethylene and acetylene with chlorine free radical can generate chlorine-containing organic species. SiO2 and functional groups on activated carbon contribute to the generation of carbon deposition. No significant reduction in the total content of mercury was observed after catalyst deactivation, while there was mercury loss locally. The irreversible loss of HgCl2 caused by volatilization, reduction and poisoning of elements S and P also can lead to catalyst deactivation. Si, Al, Ca and Fe oxides are scattered on the activated carbon. Active components are still uniformly absorbed on activated carbon after catalyst deactivation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Chemical Engineering - Volume 26, Issue 2, February 2018, Pages 364-372
Journal: Chinese Journal of Chemical Engineering - Volume 26, Issue 2, February 2018, Pages 364-372
نویسندگان
Chao Liu, Chenhui Liu, Jinhui Peng, Libo Zhang, Shixing Wang, Aiyuan Ma,