Thermal Analysis of Co-Firing of Oil Shale and Biomass Fuels

Abstract

The effect of co-firing of biomass fuels with oil shale on combustion was investigated. Thermogravimetric analysis and differential scanning calorimetry were the tools used to perform the investigation. Since the combustion of biomass is highly exothermic, biomass fuels can serve as an appropriate fuel feedstock. Biomass fuels producing much volatile matter and containing less cellulose are good candidates for co-firing with oil shale. The biomass samples used in the study were hazelnut shell, wheat bran, poplar, and miscanthus. Co-firing of biomass/oil shale blends was performed using different biomass ratios (10, 20 and 50% by weight).

Thermogravimetric analysis and process simulation of oxy-fuel combustion of blended fuels including oil shale, semicoke, and biomass

“…[24][25][26] According to these studies, it has been reported that the value of activation energy decreases with the proportion of biomass mixed with SC and OS. [24][25][26] According to these studies, it has been reported that the value of activation energy decreases with the proportion of biomass mixed with SC and OS.…”

“…Several studies have considered co-firing of unconventional fuels, including OS and SC, with other fuels (biomass, sludge, waste, etc) [23][24][25][26][27] to better understand the interactions between these fuels and support designers and operators when they evaluate the feasibility of different fuel blends for varying combinations in their installations. Trikkel et al performed combustion tests with SC and its mixtures with small additions of OS (from Estonia) on the 50 kW circulating fluidized bed combustion (CFBC) test rig.…”

“…23 The main technical parameters of the burning process were evaluated in terms of heat and mass balances, chemical composition of ash, as well as its SO 2 -binding ability and binder properties. On the basis of the co-combustion results obtained from TG tests with OS and different biomass fuels from Turkey, 26 lower ignition temperatures and improved combustion process were identified for blending of OS with biomass, and 10% to 20% by weight blended with OS was found to be a good option for co-firing. However, the addition of OS to SC at the amount of 10% to 20% is required when the moisture content of SC exceeds 10%.…”

Differences between combustion and oxy-combustion of corn and corn–rape blend using thermogravimetric analysis

“…Non-isothermal kinetic methods have been used to study the thermal decomposition kinetics of residual carbonaceous materials, such as rubber [35], sugarcane bagasse [36], composting residues [37] and other bioresidues, especially lignocellulosic materials [34,11].…”

“…Moreover, according to E. Özgür et al [11] one of the advantages of co-firing two different fuel types is that the power plant in operation can burn a supplementary fuel, which, depending on the fuel type and combustion system, can result in little or no additional costs for the new fuel. Co-firing with biomass can be friendlier environmentally because of lower emissions of greenhouse gases from carbon-neutral fuel in the blend.…”