Gasification of Carbon Rods with Carbon Dioxide1*2
نویسندگان
چکیده
The possible relation between the properties of six commercial carbons and their gasification rates with carbon dioxide a t a series of temperatures between 900 and 1300” has been investigated. The following properties of the carbons have been determined: yantitative and qualitative ash analyses, hydrogen content, interlayer spacing, average crystallite size, true and apparent ensity, porosity, surface area and effective diffusion coefficients of hydrogen through the carbons. No general correlation between these properties and the carbon gasification rates was found.
منابع مشابه
Effect of Gas Diffusion in Graphitized Carbon Rods on Their Gasification Rate with Carbon Dioxide'>'
At high temperatures, the experimental gasification rates of graphitized carbon rods are found to deviate progressively more from their intrinsic gasification rates, aa temperature is increased. This is shown to be caused by the increasing control of the reaction by the rate of transport of carbon dioxide through the internal pores of the carbon rod. The ditTusionalresistance concepts used to c...
متن کاملSimulation and modeling of hydrogen production from glucose biomass model compound via hydro-thermal gasification
Glucose is a 6-carbon carbohydrate compound present in plants and the ingredient for hemicellulose which makes up 30% of plants’ total mass. The current study uses glucose as reactant and evaluates hydrogen generation at different temperatures and different amounts of input flow of glucose – water mixture. Hydrothermal gasification method is used for hydrogen generation in an open system with c...
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 کاملGasification-based Biomass
The conversion of biomass to a lowor medium-heating-value gaseous fuel (biomass gasification) generally involves two processes. The first process, pyrolysis, releases the volatile components of the fuel at temperatures below 600°C (1,112°F) via a set of complex reactions. Included in these volatile vapors are hydrocarbon gases, hydrogen, carbon monoxide, carbon dioxide, tars, and water vapor. B...
متن کاملKinetics of MSWI Fly Ash Thermal Degradation. 2. Mechanism of Native Carbon Gasification
A generalized kinetic model for fly ash native carbon oxidation is developed. It is shown that the conversion of fly ash native carbon to CO2 is the result of two simultaneous processes taking place on fly ash surface: the first process (rate constant k2) is the direct oxygen transfer from a metal oxide site to a vacant carbon active site leading to immediate carbon gasification; the second one...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001