the importance of the precursor to prepare high temperature water -gas shift reaction catalysts
- سال انتشار: 1393
- محل انتشار: پانزدهمین کنگره ملی مهندسی شیمی ایران
- کد COI اختصاصی: ICHEC15_351
- زبان مقاله: انگلیسی
- تعداد مشاهده: 557
نویسندگان
Chemistry Department of Imam Khomeini International University, Qazvin, Iran Catalyst Research Group, Petrochemical Research and Technology Company, National Petrochemical Company,(NPC-RT), Tehran, Iran
Chemistry Department of Imam Khomeini International University, Qazvin, Iran
Catalyst Research Group, Petrochemical Research and Technology Company, National Petrochemical Company,(NPC-RT), Tehran, Iran
Chemical Engineering Department, Faculty of Engineering, University of Kashan, Iran
چکیده
Fe-Cr-Cu catalysts were prepared and studied in regard to their performance in the high-temperature water-gas shift reaction (HTS), which is the key step of hydrogen and ammonia industrial plants. In this work, the effect of the precursor on the activity of magnetite-based catalysts prepared by precipitating a composition containing divalent and trivalent iron compounds and a modifier trivalent chromium with a base, was studied in terms of CO conversion. The production of catalysts in their active form avoids the step of activation prior to use, in industrial processes. Sulfates and chlorides were the selected precursors. A commercial Fe–Cr based WGS catalyst was used for comparison. Catalysts were characterized using BET surface area measurements, temperature-programmed reduction (TPR) and X-ray fluorescence (XRF). According to the obtained results, the materials prepared with sulfate showed lower specific surface areas but they were more active than those obtained from chloride and the commercial one and there were three reduction peaks for all the samples in TPR resultsکلیدواژه ها
High-temperature water-gas shift reaction, Fe-Cr-Cu catalysts, magnetite-based catalysts, co-precipitation, CO conversionمقالات مرتبط جدید
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