The correlations of chemical property, alkali metal distribution, and fouling evaluation of Zhundong coal

Wang, Chang‐An; Tang, Guantao; Sun, Ruijin; Hu, Guangtao; Yuan, Maobo; Che, Defu

doi:10.1016/j.joei.2020.06.002

Cited by 40 publications

(9 citation statements)

References 43 publications

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“…It can thus be concluded that the variation of ash content concerning particle size is a function of coal properties. The ash mineral content of Barapukuria coal shows that the most dominant compounds are SiO2 and Al2O3 with a concentration above 90%, which is similar to other bituminous coal studied in the literature [19]. Whereas, the concentration of AAEM, which provides the catalytic effect in gasification reaction is only 4.23%.…”

Section: Sample Characterisationsupporting

confidence: 73%

See 1 more Smart Citation

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

Shahabuddin

Kibria

Bhattacharya

2021

Journal of the Energy Institute

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Section: Sample Characterisationsupporting

confidence: 73%

“…Whereas, the concentration of AAEM, which provides the catalytic effect in gasification reaction is only 4.23%. The catalytic effect of mineral matter is expressed by the alkali index (AI), which is the ratio between basic and acidic compounds, as shown below [6,19]:…”

Section: Sample Characterisationmentioning

confidence: 99%

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

Shahabuddin

Kibria

Bhattacharya

2021

Journal of the Energy Institute

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“…Among various heavy carbon sources, Zhundong subbituminous coal has received increasing attention due to its abundant reserve in China and unique physicochemical properties [such as high content of alkali/alkali earth metal (AAEM) and volatile]. 19 Some studies have explored the preparation of high-performance activated coke using Zhundong coal as raw material. In particular, it has been found that alkali/alkali earth metal existing in Zhundong raw coal shows catalytic etching reactions of the activating agent (such as H 2 O and CO 2 ) with a carbon matrix, thereby promoting the formation of a hierarchically porous structure.…”

Section: Introductionmentioning

confidence: 99%

“…Among various heavy carbon sources, Zhundong sub-bituminous coal has received increasing attention due to its abundant reserve in China and unique physicochemical properties [such as high content of alkali/alkali earth metal (AAEM) and volatile] . Some studies have explored the preparation of high-performance activated coke using Zhundong coal as raw material.…”

Section: Introductionmentioning

confidence: 99%

One-Step Catalytic Activation Promoting Pore Development of Zhundong Coal-Based Activated Coke: A Compared Study with Conventional Carbonization–Activation Combined Process

Chen

Sun

et al. 2022

Energy Fuels

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Hierarchically porous activated coke is widely applied in pollutant removal due to its excellent molecule adsorption and transportation ability. Catalytic activation with the participation of alkali/alkaline earth metal salt has been reported to be effective for constructing hierarchical pore configuration; however, the technical condition remains to be explored for providing guidance to practical preparation process. Herein, the relationship between the porous structure of Zhundong coal-based activated coke and the technical condition during catalytic activation is systematically discussed. Based on comparisons of porous structures obtained under different carbonization−activation conditions, one-step catalytic activation is demonstrated to be more favorable for pore development than traditional carbonization−activation process. Physicochemical structural analyses of the precursor and the prepared activated coke reveal that pore development during catalytic activation is also related to the surface chemistry of the precursor and particle size. Amplified preparation experiments in rotary kiln further verify the potential of one-step catalytic activation in industrial production. As a proof of application, selective catalytic reduction tests show that the prepared hierarchically porous activated coke via one-step catalytic activation exhibits high efficiency in NO removal. This work highlights the promoting role of one-step catalytic activation in pore development, providing guidance for preparing high-performance activated coke under practical industrial conditions.

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“…The element effects on ash fusion were limited to a certain element types and the ash composition benchmark was circumscribed, 32–35 which ignored the comprehensive elemental interaction and hindered the acquisition of the general rule of the ash composition influence on ash fusion behavior. In our previous work, over 150 kinds of Zhundong coal ash composition were analyzed and the average of each composition was obtained 36 . Accordingly, the present work studied the influences of each ash composition content on AFTs and crystal phase composition through synthetic ash comprehensively, including SiO 2 , Al 2 O 3 , Na 2 O, K 2 O, CaO, MgO, Fe 2 O 3 , and TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Effects of ash compositions in Zhundong coal on its ash fusion behavior and crystal phase transformation

Wang

Sun

Tang

et al. 2021

Asia-Pacific J Chem Eng

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The ash‐related issues hinder the safe utilization of Zhundong coal, closely relevant to its ash compositions. Previous studies mainly focused on the experimental methods and the selection of ash composition benchmark was restricted to a specific coal sample with limited element types, ignoring the comprehensive elemental interaction. Here, the impacts of eight compositions on ash fusion and crystal phase transformation behaviors were taken into consideration. Moreover, FactSage software was employed to further elucidate the transformation mechanism of ash composition with the increasing temperature. The results showed that the refractory forsterite and merwinite disappeared but more magnesioferrite was present with an increase in ferric oxide content, resulting in the decrease of ash fusion temperatures. The refractory substances, such as forsterite, perovskite, periclase, and larnite, occurred successively with the increasing ratio of basic oxide to acid oxide. The slag content had reached its maximum at 1200°C, up to 90% as the content of CaO was 16%, which was corresponding to that the flowing temperature descended to the lowest point around 1200°C with 16% CaO. With the rising temperature, more slag appeared and the composition species declined, related with the generation of fusible compounds containing Fe and Na at high temperature. The present work can play a guiding role in safe and clean use of Zhundong coal.

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The correlations of chemical property, alkali metal distribution, and fouling evaluation of Zhundong coal

Cited by 40 publications

References 43 publications

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

One-Step Catalytic Activation Promoting Pore Development of Zhundong Coal-Based Activated Coke: A Compared Study with Conventional Carbonization–Activation Combined Process

Effects of ash compositions in Zhundong coal on its ash fusion behavior and crystal phase transformation

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