Simultaneous optimization of a heat integrated coal gasification process

Zhu, Yi; Oyedun, Adetoyese Olajire; Wang, Maojian; Hui, Chi Wai

doi:10.1016/j.cherd.2015.04.025

Cited by 10 publications

(3 citation statements)

References 21 publications

(24 reference statements)

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“…Multi-nozzle opposed CWS gasification technology improved the single nozzle feeding way of conventional CWS gasification technology, using a multi-nozzle opposed layout, which enhanced the atomization and gasifier CWS mixing and improved the temperature field, velocity field and gasification conditions inside the gasifier. It was reported the effective gas composition of the synthesis gas (CO+H 2 ) increased [3].…”

Section: Cws Pressured Gasification Technologymentioning

confidence: 99%

Update Progress of Pressurized Entrained-Flow Gasifier with Coal Slurry in China

Liu

Hao

Zhang

et al. 2014

AMM

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Coal Water Slurry (CWS) gasification technology has a stable market due to its technical advantages. China did a lot of research and development work in coal slurry gasification technology, which has made considerable progress. Especially CWS gasification technology with Membrane Water Wall which was put into operation in recent years got a significant improvement in terms of safety, fuel flexibility, reliability and continuous operation cycles.

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Section: Cws Pressured Gasification Technologymentioning

confidence: 99%

Update Progress of Pressurized Entrained-Flow Gasifier with Coal Slurry in China

Liu

Hao

Zhang

et al. 2014

AMM

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“…Char and ash are the solid materials after pyrolysis. In most gasification models, the properties of char and ash are considered separately and char is commonly represented by graphite. , However, in order to guarantee the mass balance, the elemental components of char must be considered. It is seen from the literature that the elemental mass fractions (dry ash free basis) of char after pyrolysis ranged as C (90–99%), H (0.1–4%), and O (0–7%). − In this study, the mass fractions of carbon, hydrogen, and oxygen in char are assumed to be 95, 2, and 3%, respectively.…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…On account of the unknown circulation flow of HCPs, an initial value is assumed. At different char or volatiles extraction rates, the gasification temperature and syngas composition can be evaluated by the GEM model which is solved by the Lagrange multiplier method. ,, Then the energy provided by HCPs is compared with the energy demand for coal pyrolysis. The circulation flow of HCPs is modified until the deviation is under an acceptable value.…”

Section: Mathematical Modelingmentioning

confidence: 99%

Effects of Char and Volatiles Extraction on the Performance of Dual Bed Pyrolysis Gasification System

et al. 2019

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The molar ratio of H 2 /CO (R HC ) and high heating value (HHV) for gasification syngas are the crucial parameters for a chemical synthesis process. Except for the conventional method by changing the ratios of O 2 /coal and H 2 O/ coal, is it feasible to improve the quality of syngas by controlling the elemental components of the given coal fed into the gasifier? To investigate this hypothesis, we focused on the dual bed pyrolysis gasification (DBPG) technology and proposed the operation of char and volatiles extraction to change the elemental mass fraction fed into a gasifier. A two-step model coupling the chemical percolation devolatilization (CPD) model for pyrolysis and the Gibbs free energy minimum model for a gasifier is raised to evaluate the performance of DBPG system, and the properties of the syngas are compared with those of the one-step gasification process. The results show that under a certain strategy for oxygen and steam feeding, if 50% of char or volatiles is extracted, the HHV of gasifier syngas can be affected slightly, while the R HC will increase by 17.13 or 9.10%, respectively. However, the unit yield of available syngas will reduce due to the extraction of char and volatiles.

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Co-gasification of Jordanian olive mill solid waste and RTC coal for thermochemical treatment: characterization and equilibrium modelling

Alkhader,

Khan,

Shawabkeh

et al. 2024

Biomass Conv. Bioref.

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Simultaneous optimization of a heat integrated coal gasification process

Cited by 10 publications

References 21 publications

Update Progress of Pressurized Entrained-Flow Gasifier with Coal Slurry in China

Update Progress of Pressurized Entrained-Flow Gasifier with Coal Slurry in China

Effects of Char and Volatiles Extraction on the Performance of Dual Bed Pyrolysis Gasification System

Co-gasification of Jordanian olive mill solid waste and RTC coal for thermochemical treatment: characterization and equilibrium modelling

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