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Thermogravimetric analysis of the Co-carbonisation of biomass-lignite blends


Reference:

Lindsey, B. and Mays, T., 2005. Thermogravimetric analysis of the Co-carbonisation of biomass-lignite blends. In: World Congress of Chemical Engineering, 7th, 2005-07-10 - 2005-07-14, Glasgow.

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Abstract

With the one of many benefits of reduced net CO2 emissions from power stations, there is a strong motive for co-firing biomass with coal fuel. However, the impacts of co-firing on other aspects of performance (e.g. particle burnout) are not well understood. This study characterizes different coal-biomass blends by thermogravimetric anal. (TGA), deriving data to be later correlated with plant performance. Carbonisation of blends of olive kernels in Ptolemais lignite (0-100 dry-wt%), were performed in a Setaram TG-92 TGA (N2, 5 K min-1, 398 to 1200 K), fuels selected as being readily available in Europe. When compared with a rule-of-mixts. type model, the wt.-loss (TG) profiles revealed linear correlations between biomass content and wt.-loss (RMS error < 1.03 wt%). Wt.-loss rate (-dTG) data of the blends were deconvolved using five Lorentzian peaks. Carbonisation of pure olive kernels was fitted with four -dTG peaks (Tmax = 561, 594, 717 and 1058 K) and pure lignite fitted with two peaks (Tmax = 661 and 1010 K). The blend -dTG profiles retain the two lignite peaks and three of the kernel peaks; the missing kernel peak being too small to be resolved. The absence of significant addnl. TG events within the blends strongly suggests that carbonisation of blends two components progress sep. The two sets of expts. support published suggestions that co-carbonisation processes are non-synergistic. Using the Lorentz peak parameters, a highly accurate model of the blends co-carbonisation -dTG was reproduced (RMS error < 0.032 wt%). [on SciFinder (R)]

Details

Item Type Conference or Workshop Items (Paper)
CreatorsLindsey, B.and Mays, T.
Uncontrolled Keywordsthermogravimetric analysis carbonization coal biomass lignite air pollution power, air pollution (control, combustion (cocombustion, statistical analysis, thermal decomposition, unclassified), modeling thermogravimetric anal. of co-carbonization of different coal biomass lignite blends), biomass, uses (uses) (modeling thermogravimetric anal. of co-carbonization of different coal biomass lignite blends), lignite role, simulation and modeling, carbonization, power plants, thermogravimetric analysis (modeling thermogravimetric anal. of co-carbonization of different coal biomass lignite blends), nuu (other use
DepartmentsFaculty of Engineering & Design > Chemical Engineering
RefereedNo
StatusPublished
ID Code912

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