کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
680104 1459962 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Integrated carbon dioxide/sludge gasification using waste heat from hot slags: Syngas production and sulfur dioxide fixation
ترجمه فارسی عنوان
گازسوز شدن دی اکسید کربن / لجن مجتمع شده با استفاده از حرارت جوش از سرباره های گرم: تولید سنتزی و تنظیم دی اکسید گوگرد
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی


• Integrated CO2/sludge gasification was explored using the waste heat from slags.
• The characteristics and the mechanism of syngas release were identified.
• The hot slags acted as not only good heat carrier but also effective SO2 fixation.
• A conceptual model of CO2/sludge gasification with multi-system was designed.

The integrated CO2/sludge gasification using the waste heat in hot slags, was explored with the aim of syngas production, waste heat recovery and sewage sludge disposal. The results demonstrated that hot slags presented multiple roles on sludge gasification, i.e., not only a good heat carrier (500–950 °C) but also an effective desulfurizer (800–900 °C). The total gas yields increased from 0.022 kg/kgsludge at 500 °C to 0.422 kg/kgsludge at 900 °C; meanwhile, the SO2 concentration at 900 °C remarkably reduced from 164 ppm to 114 ppm by blast furnace slags (BFS) and 93 ppm by steel slags (SS), respectively. A three-stage reaction was clarified including volatile release, char transformation and fixed carbon using Gaussian fittings and the kinetic model was analyzed. Accordingly, a decline process using the integrated method was designed and the optimum slag/sludge ratio was deduced. These deciphered results appealed potential ways of reasonable disposal of sewage sludge and efficient recovery of waste heat from hot slags.

Syngas production was achieved using an integrated method of CO2/sludge gasification using hot slags from the steel industry. This method mainly involved a rotary cup atomizer (RCA) system and a gasifying system.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 181, April 2015, Pages 174–182
نویسندگان
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