Transformation of alkali and alkaline earth metals during the preparation of activated carbon from Zhundong high-alkali coal

Liang, Dingcheng; Xie, Qiang; Liu, Jinchang; Liu, Deqian; Wan, Chaoran; Yang, Shuai

doi:10.1039/d0ra09518d

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…The water-soluble sodium in coal primarily consisted of simple free sodium salt (mainly NaCl and Na2SO4, NaHCO3, etc.) and hydrated ions (Na•xH2O) [26,27]. In Figure 4b, the concentration of SO 2-4 increased, followed by an initial increase and subsequent decrease in HCO -3 .…”

Section: Mechanism Analysis Of Water-coal Interactionmentioning

confidence: 93%

“…Numerous studies have confirmed that clay minerals on coal surfaces generally possess a negative charge, enabling cations such The water-soluble sodium in coal primarily consisted of simple free sodium salt (mainly NaCl and Na 2 SO 4 , NaHCO 3 , etc.) and hydrated ions (Na•xH 2 O) [26,27]. In Figure 4b, the concentration of SO 2− 4 increased, followed by an initial increase and subsequent decrease in HCO − 3 .…”

Section: Mechanism Analysis Of Water-coal Interactionmentioning

confidence: 94%

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Study on the Interaction Mechanism between Residual Coal and Mine Water in Goaf of Coal Mine Underground Reservoir

Jiang,

Zhao,

Liu

et al. 2023

Sustainability

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In this paper, the coal pillar dam body of the underground reservoir in Daliuta coal mine, along with the residual coal and the mine water present in the goaf, were taken as research subjects, and a dynamic simulation experiment device was constructed to simulate the actual process of a coal mine underground reservoir (CMUR). The composition and structure of middling coal during the experiment were determined by X-ray diffraction analysis (XRD) and X-ray fluorescence spectrometry (XRF), while changes in ion content in the mine water were assessed through ion chromatography (IC) and inductively coupled plasma emission spectrometry (ICP-OES). Based on both the composition and structure of coal as well as variations in ion concentrations in water, the interaction mechanism between coal and mine water was explored. The results showed that the water–coal interaction primarily arose from the dissolution of minerals, such as rock salt and gypsum, within coal. Additionally, coal samples in mine water exhibited adsorption and precipitation of metal ions, along with cation exchange reaction. Na+ in mine water predominantly originated from the dissolution of rock salt (sodium chloride) in coal, while Ca2+ and SO42− were released through the dissolution of gypsum and other minerals in coal. In the process of the water–coal interaction, Ca2+ in the water body was adsorbed and immobilized by the coal sample, leading to the formation and deposition of CaCO3 on the surface of the coal, thereby increasing the calcite content. These processes collectively contributed to a decrease in the concentration of Ca2+ in the water body. Moreover, the cation exchange reaction occurred between Ca2+ and Mg2+ in mine water and Na+ in the coal sample. The presence of Ca2+ and Mg2+ resulted in their displacement of Na+ within the coal matrix, consequently elevating Na+ concentration in the mine water while reducing both the Ca2+ and Mg2+ concentrations. On this basis, combined with insights from the water–rock interaction, it can be inferred that the adsorption mechanisms involving rocks played a dominant role in the decrease of Ca2+ concentration during the water–rock interactions. Meanwhile, the dissolution processes of minerals both in the water–rock and water–coal interactions predominantly contributed to the increase of Na+ and Cl− concentrations.

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Section: Mechanism Analysis Of Water-coal Interactionmentioning

confidence: 93%

Section: Mechanism Analysis Of Water-coal Interactionmentioning

confidence: 94%

Study on the Interaction Mechanism between Residual Coal and Mine Water in Goaf of Coal Mine Underground Reservoir

Jiang,

Zhao,

Liu

et al. 2023

Sustainability

Self Cite

View full text Add to dashboard Cite

show abstract

“…Seperti yang ditemukan pada biokarbon lainnya, karbon ini mengandung berbagai mineral yang diserap selama hidupnya sebagai pohon. Sifat alkalinya (Liang et al, 2021) dapat meningkatkan tingkat pH air minum menjadi air dengan pH yang lebih besar dari tujuh secara alami. Sepotong tongkat binchotan yang dimasukkan ke dalam air untuk konsumsi dapat mengikat klorin dan senyawa pengotor lainnya sambil melepaskan mineral berguna seperti kalsium, magnesium, dan potassium sehingga air menjadi lebih bermanfaat.…”

Section: Gambar 1 Presentasi Pembuatan Kerajinan Tangan Karbon Konduk...unclassified

Ideasi Kreativitas Masyarakat Desa Berupa Kerajinan Tangan dengan Menggunakan Karbon Konduktif

Syarif

2023

ABDINE

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Salah satu tujuan dari program pengabdian kepada masyarakat (PPM) meningkatkan keterampilan berpikir, membaca dan menulis atau keterampilan lain yang dibutuhkan (soft skills dan hard skills) anggota masyarakat. Kegiatan yang dilakukan dalam program ini adalah membuat kerajinan tangan untuk alat permainan edukatif dari bahan bekas. Kegiatan dilakukan di desa Payakabung, Ogan Ilir, Sumatera Selatan bertempat di balai desa dan bengkel pengerajin gerabah di desa Payakabung. Kegiatan utama diisi dengan demo dan presentasi yang sifatnya pelatihan Pelatihan dilakukan dalam proses pengembangan kerajinan tangan dengan menggunakan karbon konduktif. Hasil kegiatan menunjukkan semua peserta kegiatan pengabdian masyarakat memiliki kemampuan dalam membuat item kerajinan tangan setelah diberikan ide oleh tim PPM Unsri. Mereka juga dapat menjelaskan aspek pengembangan produk kerajinan tangan dengan memanfaatkan karbon konduktif. Tim PPM mengunjungi desa kembali untuk mengevaluasi ketertarikan peserta dalam menjalankan rencana kegiatan. Pada pertemuan evluasi memperlihatkan hasil karyanya dengan bahan-bahan yang disiapkan. Melalui kegiatan ini, dapat disimpulkan bahwa kegiatan ideasi kepada masyarakat kerajinan tangan berbasis karbon konduktif dapat disampaikan dengan baik

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Recent insights in synthesis and energy storage applications of porous carbon derived from biomass waste: A review

Yin

Liu

Wang

et al. 2022

International Journal of Hydrogen Energy

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Transformation of alkali and alkaline earth metals during the preparation of activated carbon from Zhundong high-alkali coal

Abstract: Schematic of the behaviour of the AAEM transformation process during the preparation of AC from Zhundong high-alkali coal.

Cited by 4 publications

References 23 publications

Study on the Interaction Mechanism between Residual Coal and Mine Water in Goaf of Coal Mine Underground Reservoir

Study on the Interaction Mechanism between Residual Coal and Mine Water in Goaf of Coal Mine Underground Reservoir

Ideasi Kreativitas Masyarakat Desa Berupa Kerajinan Tangan dengan Menggunakan Karbon Konduktif

Recent insights in synthesis and energy storage applications of porous carbon derived from biomass waste: A review

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