Studies on Co2 Gasification Reactivity of High Ash Indian Coal
نویسنده
چکیده
Coal is a prime energy source in India and will continue to play its role for coming several decades. However, our indigenous coal suffers from high ash content and present coal based conventional power generation technologies have several drawbacks such as, lower efficiency, environmental loading and damages thereof. Herein the importance of gasification lies because coal gasification is a mean to utilize coal more efficiently meeting stringent environment controlled parameters. Studies on coal gasification reactivity is essential to design and to select suitable gasifier matching with coal properties. Presently, systematic reactivity data on high ash Indian coals is limited. Considering this limited gasification data of high ash Indian coals, present study investiges CO2 gasification of high ash Indian coal-char samples (preapred at 900 and 1000 0 C) in the temperature range of 900 – 1000 0 C and discusses the effect of coal properties and operating conditions on gasification reactivity.
منابع مشابه
CO2 Gasification Reactivity of Chars Derived From Zhundong Coal
Coal gasification with carbon dioxide is a process for generating clean gaseous fuels and relieving greenhouse effect. Zhundong coal has high alkali and alkali earth metals (AAEMs) content, medium volatile and low ash in nature. Isothermal CO2 gasification of char derived from Zhundong coal (R-char) and char from acid washing R-char (AR-char) are performed in thermo-gravimetric analyzer (TGA). ...
متن کاملExperimental Investigation of Chemically Activated Pine Wood Char Gasification at High Pressures Using Tunable Diode Laser Absorption Spectroscopy
Biomass and coal gasification is a rapidly developing technology due to the increasing global demand for fossil fuel resources. Gasification is the process of conversion of solid carbonaceous feedstock to a gas mixture containing CO and H2 in the presence of steam or carbon dioxide. Past research on coal gasification has shown that the process requires high temperatures (> 800 oC) and produces ...
متن کاملCatalytic Effect of Metal Species on Enhancement of CO2 Gasification Reactivity of Biomass Char
In the Boudouard reaction, where CO2 is reacted with carbon (char) to produce CO, very high temperatures are required to shift the equilibrium towards CO production. This endothermic reaction is inherently slow and catalytic species are effective to speed up the reaction rate at temperatures below 900 °C. In this study, the catalytic effect of some alkali (K, Na), alkaline earth (Ca) and transi...
متن کاملChemical-Looping Combustion and Gasification of Coals and Oxygen Carrier Development: A Brief Review
Chemical-looping technology is one of the promising CO2 capture technologies. It generates a CO2 enriched flue gas, which will greatly benefit CO2 capture, utilization or sequestration. Both chemical-looping combustion (CLC) and chemical-looping gasification (CLG) have the potential to be used to generate power, chemicals, and liquid fuels. Chemical-looping is an oxygen transporting process usi...
متن کاملDetailed characterization of South African high mineral matter inertinite-rich coals and density fractions and effect on reaction rates with carbon dioxide: Macerals, microlithotypes, carbominerites and minerals
An investigation was undertaken to determine the distribution of macerals and minerals in South African Highveld coal deposits as well as density fractions derived from a typical deposit. The corresponding effects on carbon dioxide gasification reaction rates were also studied. Detailed chemical, petrographic and mineral analyses, followed by reactivity measurements and reaction rate modeling w...
متن کامل