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research-article

Advanced Concepts in Modular Coal and Biomass Gasifiers

[+] Author and Article Information
John Dooher

Adelphi University, Chairman, Physics Department, One South Ave, Garden City, NY 11530
dooher@adelphi.edu

Marco Castaldi

Chemical Engineering Department, The City College of New York, City University of New York, 140th Street|Convent Avenue, Steinman Hall, Room 307, New York, NY 10031
mcastaldi@ccny.cuny.edu

Dean Modroukas

Principal, Innoveering, LLC, 100 Remington Blvd., Ronkonkoma, NY 11779
dean.modroukas@innoveering.net

1Corresponding author.

ASME doi:10.1115/1.4040526 History: Received September 10, 2016; Revised May 29, 2018

Abstract

The program involves the application of a compact and modular gasification concept, termed a tunable catalytic gasifier (TCG) to produce syngas from coal, biomass, and waste slurries. The TCG employs a pressurized entrained flow reactor wherein the external wall surfaces are catalytically heated using a portion of the produced syngas. In addition, slurry is introduced into the reactor via a twin fluid atomizer to more efficiently promote syngas yields. The TCG is ideally suited for producing energy from coal, biomass and MSW because it uses an external catalytic combustion chamber to drive the steam-driven gasification reactions at 1000 C, providing for a variety of gasification feedstocks and low contamination in the exit gases. The TCG can be fed by a hydrothermal treatment reactor (HTR) for biomass and waste feedstocks, which employs well-developed hydrothermal processing technology using the addition of heat and water to provide a uniform slurry product. A clean syngas is produced at high cold gas efficiency (80%) and the fuel gas is cleaner than that produced in current technologies. The TCG can operate over a wide range of positive pressures (up to 30 bars) that provides process control to vary the output (tunable) to match end-use needs or feedstock rate. The system produces minimal emissions and operates at significantly higher efficiency and lower energy requirements than pyrolysis, plasma gasification, and carbonization systems. Test results and model simulations are presented on a single tube system and analyses of a variety of configurations presented.

Copyright (c) 2018 by ASME
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