Abstract

Physicochemical regularities are studied for the synthesis of molded active carbons based on coconut shells and peat, with a latex emulsion and a carboxymethyl cellulose (CMC) sodium salt solution being used as binding agents. The materials are obtained at compacting pressures of 25, 50, and 100 MPa. The specific surface areas of the composite samples obtained from peat and coconut shells are S_BET ≈ 1320 and ≈1290 m²/g, respectively. The specific micropore volumes of the composites based on peat and coconut shells are W₀ = 0.50 and 0.45 cm³/g, respectively. Latex-modified carbon samples have a higher bulk density than those molded with CMC. The molding of the active carbons is accompanied by partial degradation of their porous structure. The Dubinin theory of volume filling of micropores (TVFM) has been employed to calculate the values of adsorption and active specific capacity of the molded adsorbents with respect to methane at a temperature of 273 K and a pressure of up to 100 bar. The experimental and calculated data have shown that the active capacity of the new microporous carbon composite materials may be as large as 180 m³ (NTP)/m³, when the pressure drops from 100 to 1 bar. It has been concluded that it is reasonable to employ the TVFM for preliminary calculations of the parameters of adsorption systems used for natural gas storage.

中文翻译：

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用于天然气储存的高密度碳吸附剂

摘要

研究了基于椰子壳和泥炭的模制活性炭合成的理化规律，其中乳胶乳液和羧甲基纤维素（CMC）钠盐溶液用作粘合剂。该材料是在25、50和100 MPa的压实压力下获得的。从泥炭和椰子壳得到的复合材料样品的比表面积是小号_BET ≈1320和≈1290米² /克。基于泥炭和椰子壳的复合材料的特定微孔体积为W ₀ = 0.50和0.45 cm ³/ g。乳胶改性的碳样品比用CMC模塑的样品具有更高的堆积密度。活性炭的模制伴随着其多孔结构的部分降解。杜宾宁微孔体积填充理论（TVFM）已用于计算模制吸附剂在273 K温度和最高100 bar压力下对甲烷的吸附值和活性比容量。实验和计算数据表明，新型微孔碳复合材料的活性容量可能高达180 m ³（NTP）/ m ³，当压力从100降至1 bar时。已经得出结论，采用TVFM进行天然气存储吸附系统参数的初步计算是合理的。