ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Numerical simulation for the steam gasification of single char particle

Vinod Kumar Yadav, Ravi Shankar, and Vineet Kumar

Department of Chemical Engineering, Government Polytechnic Gorakhpur, Gorakhpur, India

E-mail: bits.iitr@gmail.com

Received: 13 May 2020  Accepted: 9 September 2020

Abstract:

Simulation of a single char particle for the synthesis gas production is challenging task due to its complex chemical reactions coupled with the varying physicochemical properties during the gasification process. Steam gasification of a single char particle require the favourable conditions for the CO and H₂ enriched gas with minimum CO₂ formation. Here, non-linear partial differential equation for the unsteady state diffusion-controlled reaction of a gasification agent (steam) inside the non-catalytic porous spherical char particle is numerically solved by staggered grid finite volume method with suitable boundary conditions. The steam gasification is numerically solved for the variable size char particle of two different diameters, i.e. 5 and 10 mm between the temperature range of 1000–1300 K. Gasification process at high-steam partial pressure suggests high H₂ and CO concentration in the synthesis gases.

Keywords: Coal; Gasification; Steam; Staggered grid; Finite volume method (FVM)

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01348-2

Chemical Papers 75 (3) 863–872 (2021)