Kinetics of Coal Gasification: Proposed Mechanism of Gasification; Development of Reaction Rate Equations; Development of Heat Transfer Equations and Method of Calculation; Calculated Relation between Gasifier Yields and Process Variables

Abstract

PROCESS DEVELOPMENT tion, through the agency of hypochlorous acid, of the aldehydes to the corresponding acetic acid, dichloroacetic acid, and trichloroacetic acid. Both types of side reaction can be controlled through proper arrangement of temperature and conditions pertaining to the introduction of chlorine. The chlorination can be carried batchwise, but is most efficiently managed on a semicontinuous or completely continuous basis.

Rate of Steam-Carbon Reaction by a Falling-Particle Method

“…The complexity of the reacting system and the absence of isothermal conditions precluded a separate study of this reaction in a coal gasifier. The experimental work reported here was designed to obtain the necessary data in an externally heated reactor under conditions approaching closely those in the gasifier: 1. Temperature range of 1800°to 2500°F ., corresponding to the range of exit temperatures of the gasifier 1 Present address, Silicone Products De-partment, General Electric Co., Waterford, N. Y. 2. Carbon particles smaller than 200mesh, entrained in a steam atmosphere 3.…”

An Introduction to the Combustion of Carbon Materials

“…Carbon oxidation typically follows successive crucial reaction steps (Figure 10). [116,124,126,198,199] (i) Diffusion of oxygen to the carbon surface through the boundary layer (including pore diffusion, see chapter 5). (ii) Adsorption of oxygen atoms onto the surface (see chapter 5) (iii) Splitting of dioxygen and successive reaction steps forming the primary product CO or CO 2 (discussed in this chapter) (iv) Desorption of primary products from the surface (see chapter 5) (v) Diffusion through the boundary layer of CO/CO 2 (see chapter…”

“…Carbon oxidation typically follows successive crucial reaction steps (Figure 10 ). [ 116 , 124 , 126 , 198 , 199 ]…”

Critical condition related to the activation of solid fuel particles; comparisons with experimental results for char combustion in a quiescent environment

“…Because of the practical importance, relevant to coal/char utilization, aerospace applications with carbon-carbon composites, ablative carbon heat-shields, and/or propulsion with high-energy-density fuels, extensive research has been conducted for the carbon combustion not only experimentally but also theoretically/numerically, and accomplishment hitherto obtained is summarized in some of the comprehensive reviews [1][2][3][4][5][6][7][8][9][10][11][12][13]. Nevertheless, because of complexities involved, there still remain several problems indispensable for understanding basic nature of the combustion, with commanding fundamental interests.…”