Variation of Char Reactivity during Catalytic Gasification with Steam: Comparison among Catalytic Gasification by IonExchangeable Na, Ca, and Na/Ca Mixture. ... Characterization of Powder River Basin coal pyrolysis with costeffective and environmentallyfriendly composite Na Fe catalysts in a thermogravimetric analyzer and a fixedbed reactor.
The catalytic mechanism is generally described as the added metal element contacting with gasifying agent (H 2 O and/or CO 2 ) produces hydrogen and/or carbon monoxide and a layer of...
A kinetic characterization of the CO 2 gasification of chars from Chinese lowrank lignite coal is performed by isothermal thermogravimetry. The isothermal condition is 1,073 K, and the CO 2 concentration range is 1090%. Alkali and alkali earth catalysts were used to promote the gasification reactivity.
Competition between H 2 O and CO 2 during the gasification of Powder River Basin coal. Fuel (2017) R. Zhang et al. The effects of specific surface area and ash on char gasification mechanisms in the mixture of H 2 O ... Hydrogen production from high temperature steam catalytic gasification of biochar. Journal of the Energy Institute, Volume 89 ...
Gasification of biomass with CO 2 and H 2 O mixtures in a catalytic fluidised bed. Fuel 2017, 210, 605610. DOI: / Ying Wang, David A. Bell. Competition between H 2 O and CO 2 during the gasification of Powder River Basin coal. Fuel 2017, 187, 94102. DOI: /
A study was carried out in both inert and CO 2 atmosphere to investigate the interaction mechanism of K 2 CO 3 with graphite and coal char during the catalytic gasification of coal char. The formation of K 2 CO 3 catalytic precursors was identified by using series of different techniques. The results obtained in an inert atmosphere show that the interaction between K 2 CO 3 and carbon readily ...
The reason for this enhanced gasification is the fact that CaO, the main form of calcium mineral during coal catalytic gasification, ... Competition between H 2 O and CO 2 during the gasification of Powder River Basin coal. Fuel, Volume 187, 2017, pp. 94102. Ying Wang, David A. Bell.
Multiple sources of carbon can be used for CO 2 gasification. Coal from varying ranks has been used ... SubBituminous Powder River Basin coal: Pure Char: SCM: 700900: : 74: : TGA [137] Fe Pure Char ... (1X) + ∑ n k cn k nc and k cn are the rate constants for the noncatalytic and catalytic gasification, respectively. k cn ...
DOI: / Corpus ID: ; Catalytic gasification of a Powder River Basin coal article{Popa2013CatalyticGO, title={Catalytic gasification of a Powder River Basin coal}, author={T. Popa and Maohong Fan and Morris D. Argyle and Rachid B. Slimane and David A. Bell and Brian Towler}, journal={Fuel}, year={2013}, volume={103}, pages={161170}, url={https://api ...
DOI: / Corpus ID: ; Characterization of the mechanism of gasification of a powder river basin coal with a composite catalyst for producing desired syngases and liquids
Popa et al. [13]. studied the catalytic steam gasification of a Powder River Basin coal using Na 2 CO 3, and the results demonstrated that the total amounts of H 2, CO, CO 2 and CH 4 generated during the entire gasification with 5 g of dry ashfree coal were,, and mol, respectively, while correspondingly, those with catalyst ...
Steam gasification kinetics studies were conducted in a modified drop tube fixed bed reactor to approximate the injection of ambient temperature coal into a fluidized bed gasifier. Product gases were measured using a customized rapid response gas analysis system with a quadrupole mass spectrometer. Experiments were done within Regime I temperature range (no mass transfer restrictions), and ...
Electrochemical catalytic coal gasification experiments with Fuxin (FX) coal under a CO2 atmosphere were conducted to evaluate the effects of power and temperature on coal gasification and char structure evolution during electrochemical catalytic gasification (ECG). When the power was 400 W, with temperature increasing from 800 to 1000 °C, the CO content in the gas products increased by % ...
As a result, fuels with larger surface area and more catalytic components in ash were preferred for increasing the intrinsic reactivity of CO2 gasification particularly for lowrank coals and biomass, respectively. ... Reaction kinetics of Powder River Basin coal gasification in carbon dioxide using a modified drop tube reactor, Fuel, 140 (2015 ...
Authors: Zhang, Fan; Xu, Deping; Wang, Yonggang; Wang, Yan; Gao, Ying; Popa, Tiberiu; Fan, Maohong Publication Date: Sun Feb 01 00:00:00 EST 2015 Sponsoring Org ...
Abstract. Catalytic gasification of a Wyodak lowsulfur subbituminous coal from the Powder River Basin of Wyoming was investigated using an inexpensive catalyst, Na2CO3, widely available in ...
Highquality oil and gas from pyrolysis of Powder River Basin coal catalyzed by an environmentallyfriendly, inexpensive composite ironsodium catalysts Article Dec 2017
The total yield of the liquid tars increased from wt% for noncatalytic stepwise degradation to wt% for CaO catalyzed stepwise degradation, with an increase of wt%. ... Characterization of the mechanism of gasification of a powder river basin coal with a composite catalyst for producing desired syngases and liquids. Appl Catal, A ...
CO 2 gasification of Wyodak lowsulfur subbituminous coal from the Powder River Basin (PRB) of Wyoming was conducted in a fixedbed laboratory gasifier at atmospheric pressure with Na 2 CO 3, an inexpensive catalyst widely available in sodium effect on the coal pyrolysis and the sodium forms existing during the char gasification were investigated using thermogravimetric analyses ...
Competition and Inhibition Effects during Coal Char Gasification in the Mixture of H2O and CO2. Rui Zhang, Q. H. Wang, Zhongyang Luo, M. Fang, K. Cen. Chemistry. 2013. The mechanisms of char gasification in the mixture of H2O and CO2 are not clear, and some problems are yet to be solved. The LangmuirHinshelwood (LH) model of char ...
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