Preparation of highly activated carbon fiber by surface modification

表面改性制备高活性碳纤维

• 批准号: 11555213
• 负责人: KORAI Yozo
• 金额: $ 5.31万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555213/
• 关键词: Activated carbon; Activated carbon fiber; surface area; Pore size distribution; oxygen functional group; nitrogen functional group; adsorbability; pore size; 硫黄酸化物; 窒素酸化物; ハロメタン; 排気ガス; 大気汚染物質; キノリン; イソキノリン; ピッチ系活性炭素繊維; 表面改質; NaOH; 賦活; 表

Pore size control of a series of active carbon fibers was attempted by CVD of benzene to clarify the influences of the pore distribution. Weight increase by CVD was found saturated at the certain level respective to the fiber, reflecting the their surface areas. However, the molecular sieving selectivity between CO_2 and CH_4 was induced only to the fibers of smaller surface area, while the fibers of larger surface areas lost the adsorption activity against both gases. Straight micropores developed from the surface are controlled at their slit size by carbon deposition onto the wall surface while benzene molecule can get into the pore. In contrast, the pore size of micropores developed on the wall of mesopore are difficult to be controlled since the carbon deposit continues until the whole wall of the mesopores is covered by the carbon to plug the microporesCatalytic denydrochlorination of 1, 2-dichloroethane(1, 2-DEC) into vinyl chloride(VC) was carried out over pitch-based active carbon fiber s(ACF). Surface modification of the ACF by Chemical Vapor Deposition(CVD) of N-containing compounds showed higher catalytic activity and longer life time at very high ralectivity than thin as-received forms. X-ray photoelectron spectroscopy(XPS) suggested that pyridinic nitrogen found on the surface of the modified fibers catalyzes the selective dehydrochlorination reaction through its basicity, radical elimination appearing suppressed to provided longer life

苯的CVD尝试了一系列活性碳纤维的孔径控制，以阐明孔分布的影响。发现CVD的重量在一定水平上饱和到纤维，反映其表面积。但是，CO_2和CH_4之间的分子筛分选择性仅诱导到较小的表面积的纤维，而较大的表面积的纤维对两种气体的吸附活性失去了吸附活性。从表面开发的直孔通过碳沉积在壁表面以其缝隙大小控制，而苯分子可以进入孔。相比之下，由于碳沉积物一直持续到中孔的墙壁上开发的微孔孔径，直到中孔的整个壁被碳覆盖，以将1、2-氯乙烷（2-二氯乙烷（1，2-二）的微量催化denydrogolination插入乙烯基氯化物（VC）（VC）的活性（carrized carrized carrized）。与稀薄的亚期形式相比，通过化学蒸气沉积（CVD）对ACF的表面修饰显示出更高的催化活性和更长的寿命。 X射线光电子光谱（XPS）表明，在改良纤维表面发现的吡啶氮通过其碱性催化选择性脱氢氯化反应，从而抑制了抑制更长的寿命

项目成果

M.Tsuji: "Effects of Microwave Absorbents in NO Removal by Microwave Discharge of NO/Ar Mixture at Atmospheric Pressure"Chemistry Letters. Vol.3. 338-339 (2002)

M.Tsuji：“微波吸收剂对大气压下 NO/Ar 混合物微波放电去除 NO 的影响”化学快报。

Y.Korai: "Preparation of an activated carbon artifact : oxidative modification of coconut shell-based carbon to improve the strength"Carbon. Vol.40. 351-358 (2002)

Y.Korai：“活性炭制品的制备：椰壳基碳的氧化改性以提高强度”Carbon。

Y.Korai 他: "Removal of SOx and NOx over activated carbon fibers"Carbon. 38. 227-239 (2000)

Y.Korai 等人：“活性碳纤维上的 SOx 和 NOx 去除”Carbon.38. 227-239 (2000)

I.Mochida 他: "Adsorption and Adsorbed Species of SO_2 during its Oxidative Removal over Pitch-Based Activated Carbon Fibers"Energy & Fuels. 13・2. 369-373 (1999)

I. Mochida 等：“基于沥青的活性碳纤维氧化去除过程中 SO_2 的吸附和吸附种类”能源与燃料 13・2 (1999)。

Y.Korai: "Structure and Properties of Isotropic Carbon Produced at 200-300℃ in Heat Exchangers of Commercial Ethylene Dichioride (EDC) Pyrolysis"Carbon. Vol.39. 1613-1616 (2001)

Y.Korai：“商用二氯乙烷（EDC）热解热交换器中在 200-300℃ 下生产的各向同性碳的结构和性能”Carbon，第 39 卷（2001 年）。