Abstract

The efficiency of thermal shock (TS), which was introduced instead of temperature-programmed heating (4 K/min) in the alkaline activation (KOH, 800°C) of fossil coals of the entire metamorphic series (С^daf = 70.4–95.6%), was evaluated by comparing the porous structure characteristics of activated carbons (ACs). ACs with increased specific surface areas (by a factor of ≤2.5) and pore volumes (by a factor of ≤2.2) but with lower (by a factor of 1.07–1.30) yields were formed upon TS. The effect of TS expressed by an increase in the specific surface area ∆S was maximal on the conversion of brown coal (∆S = 870 m²/g), and it decreased to a minimum in coals with С^daf = 90 ± 1% (∆S = 109 m²/g) or increased on the activation of anthracites (∆S = 496 m²/g). It was shown that the efficiency of TS increased with O^daf, which is responsible for the formation of subnanopores, for lignites and coals. On the activation of anthracites, an additional pore formation mechanism not associated with oxygen groups was activated.

中文翻译：

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化石煤热碱转化为纳米多孔材料中热冲击的效率

摘要

热冲击的效率（TS），其被引入的，而不是程序升温加热（4 K /分钟）在整个变质一系列化石煤的碱性活化（KOH，800℃）（С ^DAF = 70.4-95.6通过比较活性炭（AC）的多孔结构特征来评估。在TS上形成比表面积增加（≤2.5的因子）和孔体积（≤2.2的因子），但孔隙率降低（1.07-1.30的因子）的AC。用比表面积∆ S的增加表示的TS对褐煤转化率的影响最大（∆ S = 870 m ² / g），而在^Сdaf = 90±1％的煤中，TS的影响降至最小。（∆ S = 109 m² / g）或因无烟煤的活化而增加（∆ S = 496 m ² / g）。结果表明，TS的效率随着O ^daf的增加而增加，这是导致亚纳米孔，褐煤和煤形成的原因。在无烟煤活化后，与氧基团无关的另一种孔形成机制被活化。