Thermogravimetric Analysis of Fuel Blends of Biomass and High-Ash Coal-Containing Waste
- PDF / 743,815 Bytes
- 6 Pages / 612 x 792 pts (letter) Page_size
- 68 Downloads / 218 Views
Thermogravimetric Analysis of Fuel Blends of Biomass and High-Ash Coal-Containing Waste O. M. Larinaa, V. A. Sinelshchikova, *, and G. A. Sytcheva aJoint
Institute for High Temperatures of the Russian Academy of Sciences, Moscow, Russia *e-mail: [email protected] Received April 19, 2020; revised May 20, 2020; accepted June 18, 2020
Abstract—An investigation of co-combustion characteristics of the two-component mixed fuel was carried out using methods of thermogravimetric analysis. As feedstock, there were used two types of biomass and the high-ash coal-containing waste, which were ash-slag waste from a coal-fired power plant and coal concentrate obtained by their enrichment. The experiments were carried out in an inert (nitrogen) and oxidizing (air) medium. It is shown, that in the temperature range characteristic for biomass burning the additivity principle cannot be used for evaluation of combustion characteristics of the blends. The presence of a coal-containing component in the mixture leads to a disproportionate decrease in the mass loss rate both in the temperature range characteristic for yield and oxidation of biomass volatile products, and in the temperature range in which its solid residue is oxidized. The effect of biomass on the oxidation rate of the coal-containing component was not found. DOI: 10.1134/S0018151X20050041
required to re-equipment of existing coal-fired power plants for co-firing of coal and biomass [4]. Biomass and coal co-firing can also be considered as efficient elimination of relatively cheap, but lowquality and unprepared hydrocarbon waste with low heating value and high moisture content [5], or with a high content of components, combustion of which is accompanied by toxic emissions, in particular of polycyclic aromatic hydrocarbons [6]. When looking for ways of energy disposal of highash coal-containing waste, the direction related to the production of granular mixed fuel from biomass and coal-containing waste seems very promising [7]. On the one hand, the addition of biomass, which is characterized by a low ash content, will reduce the total ash content of a mixed fuel. On the other hand, the presence of lignin, which is part of biomass and has binding properties, will facilitate the pelletization process. Investigations devoted to co-firing of various types of biomass with coal-containing raw materials may be divided into two groups. The first group includes studies conducted on real fuel boilers [8, 9] or laboratory facilities simulating their operation [5, 10, 11]. The purposes of such studies are: determination of the influence of the mixed fuel composition on the boiler efficiency and the amount of harmful emissions; selection of the optimal mixed fuel composition and boiler operating parameters. The second group includes researches carried out on analytical equipment in order to study the combustion characteristics of mixed fuels, such as characteristic temperatures, reactivity, kinetic parameters, and to determine an
INTRODUCTION Recently, much attention has been pai
Data Loading...
