Catalytic gasification of coal using eutectic salts: reaction kinetics with binary and ternary eutectic catalysts

Oil production from mild pyrolysis of low-rank coal in molten salts media

“…Matsunami et al [36] have successfully utilized the mix of K 2 CO 3 and Na 2 CO 3 to increase the gasification rate of coal. The similar result was also obtained by utilization of binary and ternary mix of carbonate salts [37,38]. However, most of their studies were focused on the gas production at high temperature.…”

Sludge Acts as a Catalyst for Coal during the Co-Combustion Process Investigated by Thermogravimetric Analysis

“…Potassium, sodium, and calcium catalysts are the most common catalysts for catalytic gasification of coal because of its low price and good catalytic effect. Yeboah et al [27] and Sheth et al [28] selected Na2CO3 and The inorganic components' content of coal and S 1 were measured by X-ray fluorescence equipment (XRF, Thermoscientific ARL ADVANT'X IntelliPowerTM 4200) in order to see the causes of the catalytic action. As shown in Figure 3, the inorganic composition of sludge is more complex than that of coal.…”

“…Potassium, sodium, and calcium catalysts are the most common catalysts for catalytic gasification of coal because of its low price and good catalytic effect. Yeboah et al [27] and Sheth et al [28] selected Na 2 CO 3 and K 2 CO 3 to study their performance on coal catalytic gasification while calcium compounds were chosen by Jiang et al [29]. In addition to alkaline and alkaline-earth metal compounds, oxides and salts of transition metals, like Fe, also have catalytic action, which was shown in the studies of Domazetis et al [30], Popa et al [31], and Zhang et al [32].…”

Gasification Fundamentals

“…At gasification temperatures, the salt mixture melts and coats the char surface. This approach has been tested by McKee et al 32 and Sheth et al 33,34 Wang et al 35 simply mixed char with solid K 2 CO 3 and steam gasified the mixture at 675 to 750 o C. Potassium is volatile at gasification temperatures, so potassium adsorbed onto the char surface from the vapor phase.…”

“…Cesium and rubidium salts, for example, are very effective catalysts, but too expensive. It's unlikely that the eutectic salt mixtures tested by Sheth et al 33,34 will be economically feasible. There are a small number of catalysts that are sufficiently inexpensive such that recovery may not be necessary.…”