Catalytic mechanism of sodium compounds in black liquor during gasification of coal black liquor slurry

Jian-ping, Kuang; Zhou, Junhu; Zhou, Zhijun; Liu, Jianzhong; Cen, Kefa

doi:10.1016/j.enconman.2007.06.032

Cited by 28 publications

(19 citation statements)

References 15 publications

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“…Recently, the effect of black liquor on coal gasification has been investigated [11,13]. The results showed that the sodium compounds in black liquor had a catalytic effect on coal gasification.…”

Section: Introductionmentioning

confidence: 98%

“…Hence, it is imperative to recover both chemicals and energy from the black liquor [11]. Recently, the effect of black liquor on coal gasification has been investigated [11,13].…”

Section: Introductionmentioning

confidence: 99%

“…Alkali and alkaline earth metallic (AAEM) species containing abundant sodium acting as effective catalysts for coal combustion and gasification [7][8][9][10][11][12] at appropriate range of temperatures would be effective catalysts for petroleum coke.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic effect of black liquor on the gasification reactivity of petroleum coke

2010

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Section: Introductionmentioning

confidence: 98%

“…Hence, it is imperative to recover both chemicals and energy from the black liquor [11]. Recently, the effect of black liquor on coal gasification has been investigated [11,13].…”

Section: Introductionmentioning

confidence: 99%

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Catalytic effect of black liquor on the gasification reactivity of petroleum coke

2010

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“…Wastewater increases surface activity as well as decreases the activation energy of gasification when mixed with coal. Kuang et al [17,18] investigated the catalytic gasification of a coal black liquor slurry (CBLS) and found that many mesopores and micropores exist on the surface of CBLS coke, which play a crucial role in catalytic gasification. Beyond the catalytic function of alkali metals, the lignin and cellulose contained in the wastewater also enhance the heat value of the syngas.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Coal Gasification Process Simulation with Alkaline Organic Wastewater in a Fluidized Bed Reactor Using Aspen Plus

et al. 2019

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A co-gasification process was proposed both for treating alkaline organic wastewater and to promote coal gasification by the alkaline substances in situ. A catalytic gasification model was developed by introducing a catalytic correction factor to describe the catalytic effects quantitatively. An integrated process simulation was carried out using Aspen Plus equipped with FORTRAN subroutines. The model was verified using the root mean square error between the simulation results and experimental data from the literature. Syngas composition, cold gas efficiency, and carbon conversion efficiency were analyzed with respect to different operating conditions (reaction temperature, steam/coal ratio, and equivalence ratio). The optimal conditions are summarized based on a self-sufficient system by using sensitivity analysis: Gasification temperature of 700 °C, steam/coal ratio = 1.0, and equivalence ratio = 0.4.

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“…In contrast, the filtered BL appeared with lower temperatures, around 242 °C with an exception of 235.4 °C at pH = 13, whose inorganic content increased by 10% after filtered. The appearance of such an unusual temperature may result from catalytic effects of sodium compounds in black liquor during pyrolysis (Kuang et al 2008). In addition, the DTG of the filtered BL slightly decreased, but that at pH = 11 increased to the maximum (-2.61%/min).…”

Section: Tg Analysismentioning

confidence: 99%

Effects of pH and Suspended Matter on the Physico-Chemical Properties of Black Liquor from Alkali-Oxygen Pulping of Rice Straw

Zhang¹

2016

BioResources

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Black liquor (BL) can be regarded as the energy and alkali resource of the pulping mill. In this work, the effects of the characteristics of black liquor derived from the alkali-oxygen pulping of rice straw were studied. Through analyses of the chemical and physical properties, especially the thermodynamics properties, which depend on suspended matter and alkalinity, it was shown that the removal of the suspended matter from the black liquor could effectively improve its thermodynamic properties, particularly in making its solids content reach up to more than 56% at the turning point of its viscosity. Moreover, sodium salt played an important role in the presence of macromolecules and silica in the BL. When the BL was adjusted to pH = 11 with NaOH, the filtered BL had the lowest silica content, the highest volumetric isothermal expansivity (VIE), was more susceptibility to thermal cracking, and was more suitable for processing for alkali recovery.

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Catalytic mechanism of sodium compounds in black liquor during gasification of coal black liquor slurry

Cited by 28 publications

References 15 publications

Catalytic effect of black liquor on the gasification reactivity of petroleum coke

Catalytic effect of black liquor on the gasification reactivity of petroleum coke

Catalytic Coal Gasification Process Simulation with Alkaline Organic Wastewater in a Fluidized Bed Reactor Using Aspen Plus

Effects of pH and Suspended Matter on the Physico-Chemical Properties of Black Liquor from Alkali-Oxygen Pulping of Rice Straw

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