کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
677655 888619 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemical hot gas cleaning concept for the “CHRISGAS” process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Chemical hot gas cleaning concept for the “CHRISGAS” process
چکیده انگلیسی

The aim of the CHRISGAS project was the development of a gasification technique to produce clean hydrogen-rich synthesis gas from biomass. In order to improve the process efficiency, this work presents a gas cleaning concept, which combines chemical hot gas cleaning with hot (1 MPa, 900 °C) and warm (1 MPa, 300 °C) filtration. As the focus is set on the removal of H2S, HCl and KCl, calculations on chemical gas cleaning for the hot and warm gas filter were done using a thermodynamic process model using SimuSage™ (GTT-Technologies). The calculations show that Ca-based and Fe-based sorbents are not suitable H2S sorbents under the conditions of the hot gas filter. For Cu-based sorbents, H2S concentration below 100 cm3 m−3 is achievable, if the temperature is reduced below 810 °C. Additional calculations of KCl sorption on alumosilicates under the conditions of the hot gas filter show that the alkali concentration in gasifier-derived gases can be limited to 100 mm3 m−3. Thus, the condensation temperature of KCl can be decreased down to 580 °C. The results of HCl sorption calculations show that Na- and K-based sorbents are only suitable for temperatures below 600 °C. Therefore, the HCl sorption is transferred to the warm gas filter. The KCl sorption results were confirmed by experiments using bauxite, bentonite, kaolinite and naturally occurring zeolite as sorbents.


► Chemical hot gas cleaning for pressurized fluidized bed gasification of biomass.
► Laboratory experiments and thermodynamic model calculations.
► Aluminosilicates limit alkalis at 800 °C to < 0.1 cm3 m−3.
► Cu-based sorbents reduce H2S at 800 °C to < 100 cm3 m−3.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 35, Supplement 1, October 2011, Pages S105–S115
نویسندگان
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