年青煤制活性焦  

ACTIVE COKES FROM LOW RANK COALS

作　　者：王继生[1] 王乃计[1] 戢绪国[1] 彭万旺[1] 陈家仁[1] 

机构地区：[1]煤炭科学研究总院北京煤化学研究所

出　　处：《煤炭学报》1998年第6期639-643,共5页Journal of China Coal Society

摘　　要：活性焦的孔隙结构与未经堵孔处理的制氮用碳分子筛的半成品炭化料相近．使用我国６种年青煤磨粉加焦油成型，５２３Ｋ空气氧化０５ｈ，再以３００Ｋｈ的升温速度至１１２３Ｋ并恒温０５ｈ，６种炭化产物都具有与国外活性焦相当的脱硫活性，而Ｎ２（７７Ｋ）比表面积只有５ｍ２ｇ左右，ＣＯ２（２９３Ｋ）孔容为０１７～０１９ｃｍ３ｇ，说明脱硫能力主要与细微孔隙的发育状况有关．对比活性焦在模拟烟气中吸附前后的程序升温脱附－质谱曲线，可见ＣＯ在１１００Ｋ以上的脱附峰显著缩小，说明与炭表面结合能最大的γ和δ态表面碳氧化合物参与了ＳＯ２分子的化学吸附．在炭化恒温时用水蒸气活化烧失５％～１０％，能够显著提高产品的脱硫活性．The pore structure of active coke(AC) is close to that of the coke for carbon molecular sieve before carbon deposit. AC comparable to those from Bergbau Forschung(BF), Germany, and Mitsui Mining Company(MMC), Japan, were produced using six low rank coals, China, after briquetting, air oxidation at 523 K for 0 5h, and finally carbonized using a heating rate of 300 Kh to 1 123 K in inert atmosphere. The pore volumes measured with CO 2 (293 K) and the specific surface areas measured with N 2( 77 K ) of the AC produced are 0 17～0 19 cm 3g and about 5 m 2g, respectively. It reveals that only ultramicropores are well developed and related to their desulfurization capacities. The mechanical strength of all the products were above 95%, comparable to the BF and MMC AC. The CO desorption peaks of γ and δ states of C—O surface oxides shown on the temperature programmed desorption mass spectrum of AC after applied in flue gas are much smaller than that on the spectrum before applied in flue gas. It implies that those C—O surface oxides with the biggest combination energies are involved in the chemisorption of SO 2 in AC. The desulfurization capacities of the six products could be significantly improved by steam activation to a burnoff of 5%～10%.

关 键 词：煤炭 活性焦 烟气 脱硫 孔隙结构 

分 类 号：TQ520.6[化学工程—煤化学工程] X680.1[环境科学与工程]