Gasification of bamboo carbon with molten alkali carbonates

Abstract

Solid carbon can be used as a fuel in the direct carbon fuel cell (DCFC). The chemical oxidation of carbon with alkali carbonates was investigated in this work. Decreasing the weight ratio of carbon to carbonate from 5 g : 5 g to 5 g : 20 g had an insignificant effect on the amount and concentration of gases. However, changing the amounts from 5 g : 5 g to 20 g : 20 g tripled the total amount of gases produced with similar gas compositions. The gas compositions ranged from 62.2-67.5 mol% CO, 13.9-14.7 mol% H 2 , and 5.7-16.8 mol% CO 2 at 800 o C. Thus CO was the dominant gas species in the conditions. With increasing temperature, CO generation was activated, especially over 700 o C. The carbonate species did not affect carbon oxidation. Steam was supplied to the carbon and carbonate mixture at a fixed flow rate of N 2 or air. H 2 was the highest composition at both cases.

Oxidation of ash-free coal in a direct carbon fuel cell

“…On the other hand, the carbon with carbonate shows a steep decrease in weight at temperatures of more than 700 C. The steep weight decrease results from CO generation from the carbon and carbonate mixture, as shown in Eq. (4) [18]. More drastic differences are observed in the AFC.…”

“…15 mol% of H 2 and ca. 6 mol% CO 2 were produced from the carbon and carbonate mixture at 800 C [18]. Fig.…”

“…62 mol% of CO and several % of CO 2 [18]. In addition, the high OCV of the carbon fuel is attributed to the low CO 2 partial pressure due to the recombination of CO 2 and O 2À to CO 2À 3 (Eq.…”

Characteristics of Solid Fuel Oxidation in a Molten Carbonate Fuel Cell

“…In general, it is accepted that carbon oxidation in a fuel cell proceeds via carbon monoxide [1,10]. The carbon is gasified with molten carbonates over 700 o C and CO is the main species [11]. Therefore, 3 g of carbon and 3 g of carbonates were mixed and supplied to the anode as a carbon fuel in this work.…”

Catalytic Gasification of Mandarin Waste Residue using Ni/CeO2-ZrO2

“…[1][2][3][4][5] Gasification is one of the thermochemical treatments, which converts biomass into syngas via partial oxidation at high temperature. [6][7][8][9][10][11][12] Steam or air has been used as gasifying agent. [11][12][13] The syngas can then be used to synthesize various chemicals (e.g., synthesis of methanol via Fischer-Tropsch reaction).…”