Assessing the catalytic effect of coal ash constituents on the CO2 gasification rate of high ash, South African coal

Hattingh, Burgert B.; Everson, Raymond C.; Neomagus, Hein W.J.P.; Bunt, John R.

doi:10.1016/j.fuproc.2011.06.003

Cited by 92 publications

(49 citation statements)

References 44 publications

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“…Several researchers (Agarwal and Sears 1980;Radovic et al 1983;Takarada et al 1986;Miura et al 1989;Ochoa et al 2001;Song and Kim 1993;Li 2007;Hattingh et al 2011) investigated the effect of catalyst on reactivity of char obtained from coals ranging peat to anthracite during gasification in the presence of varying gasifying mediums. Presence of catalyst in char can be inherent or may be impregnated.…”

Section: Effect Of Operating Parameters 21 Effect Of Catalytic Activmentioning

confidence: 99%

“…Presence of catalyst in char can be inherent or may be impregnated. From the investigation of several researchers (Agarwal and Sears 1980;Radovic et al 1983;Takarada et al 1986;Miura et al 1989;Song and Kim 1993;Ochoa et al 2001;Li 2007;Hattingh et al 2011), it can be said that the reactivity of char having inherent or impregnated catalyst is dependent upon a number of factors such as weight and type of catalyst. Song and Kim (1993) investigated the effect of presence of catalyst by weight percentage on char reactivity.…”

Section: Effect Of Operating Parameters 21 Effect Of Catalytic Activmentioning

confidence: 99%

“…They have also reported that the reactivity increases with the addition of catalyst up to 6 wt%. Hattingh et al (2011) reported that increased amount of CaO and MgO content enhances catalytic effect of coal which in turn enhances reactivity of coal. Schobert (1992) reported that the presence of Na 2 O and K 2 O also increases the reactivity but their effect is not considered due to negligible amount of such species in ash.…”

Section: Effect Of Operating Parameters 21 Effect Of Catalytic Activmentioning

confidence: 99%

See 2 more Smart Citations

Effect of operating parameters on coal gasification

Mishra

Gautam

Sharma

2018

Int J Coal Sci Technol

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Coal combustion and gasification are the processes to utilize coal for production of electricity and many other applications. Global energy demand is increasing day by day. Coal is an abundant source of energy but not a reliable source as it results into high CO 2 emissions. Energy industries are expected to decrease the CO 2 emission to prevent global warming. Coal gasification is a process that reduces the CO 2 emission and emerges as a clean coal technology. Coal gasification process is regulated by several operating parameters. A Number of investigations have been carried out in this direction. A critical review of the work done by several researchers in the field of coal gasification has been compiled in this paper. The effect of several operating parameters such as coal rank, temperature, pressure, porosity, reaction time and catalyst on gasification has been presented here.

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Section: Effect Of Operating Parameters 21 Effect Of Catalytic Activmentioning

confidence: 99%

Section: Effect Of Operating Parameters 21 Effect Of Catalytic Activmentioning

confidence: 99%

Section: Effect Of Operating Parameters 21 Effect Of Catalytic Activmentioning

confidence: 99%

See 1 more Smart Citation

Effect of operating parameters on coal gasification

Mishra

Gautam

Sharma

2018

Int J Coal Sci Technol

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“…Internal factors affecting the gasification reactivity of raw materials include the volatile matter and mineral and carbon contents (Skodras and Sakellaropoulos 2002;(Hattingh et al 2011;Huo et al 2014). In this study, the volatile matter of the biomass chars was not the main factor affecting the gasification reactivity, as the chars obtained experienced a comparatively complete pyrolysis process and most of the volatile matter content (> 90%) was removed.…”

Section: Fig 2 Calculated and Experimental Ch4 And Overall Gas Yielmentioning

confidence: 80%

Effect of Biomass Char Additives on the Hydrogasification Behavior of a Bituminous Coal

et al. 2016

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The hydrogasification behavior of a Chinese bituminous coal with three different biomass char additives, i.e., sargassum char (SG char), saw dust char (SD char), and wheat straw char (WS char), was studied in a pressurized fixed bed reactor. The effects of the biomass char amount (0 to 30%), pressure (0.1 to 4 MPa), and temperature (973 K to 1073 K) on hydrogasification reactivity of coal were investigated. The results showed that the SD char and WS char improved the hydrogasification reactivity of coal noticeably, but for the SG char, the improvement at 973 K was not obvious because of the high content of chlorine. For all samples, the hydrogasification reactivity increased with increasing temperature and pressure. Moreover, experiments involving coal with different ash of biomass chars were conducted to verify the catalytic effects of alkali and alkaline earth metal (AAEM) species in the biomass char.

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“…The XRD experiments were done at XRD Analytical and Consulting, Pretoria, South Africa following the procedure and experimental method detailed in Everson and co-workers [35]. All the XRD experiments were repeated three times and the final results are averages of three independent results from which experimental errors were calculated at 95% confidence level.…”

Section: Apparatus and Proceduresmentioning

confidence: 99%