CAJ | 학술논문

在管式反应器上进行了霍林河褐煤加压快速热解实验,研究了CO气氛下CH4逸出规律。在加压快速热解条件下,由于CO解离态吸附的O( a)吸附在煤上,提供了活性中心,电负性强的O( a)诱发其周围其他原子的电子云向O( a)偏移,减弱了原来化学键的强度,导致芳香环的开裂,侧链、醚键和脂肪链的断裂提供更多的自由基,稳定煤热解生成的碎片,促进了CH4的生成和逸出。因此,CO气氛下CH4产率较N2气氛下的高,在900℃、1.0 MPa时,50%CO气氛下的CH4产率较N2气氛下的提高了12.5%,并且CH4产率随着温度升高、压力的增大而增大。
재관식반응기상진행료곽림하갈매가압쾌속열해실험,연구료CO기분하CH4일출규률。재가압쾌속열해조건하,유우CO해리태흡부적O( a)흡부재매상,제공료활성중심,전부성강적O( a)유발기주위기타원자적전자운향O( a)편이,감약료원래화학건적강도,도치방향배적개렬,측련、미건화지방련적단렬제공경다적자유기,은정매열해생성적쇄편,촉진료CH4적생성화일출。인차,CO기분하CH4산솔교N2기분하적고,재900℃、1.0 MPa시,50%CO기분하적CH4산솔교N2기분하적제고료12.5%,병차CH4산솔수착온도승고、압력적증대이증대。
Fast pyrolysis of Huolinhe lignite was carried out under pressure in a tubular reactor, and the CH4 evolution at CO atmosphere was examined. CO dissociation state O( a) adsorbed on coal is an active center. The stronger electronegative O could induce the electron cloud of other atoms around O ( a ) atom to offset to it, which could weaken the strength of original chemical bonds and promote their breaking. These result in the cracks of the aromatic ring, side chain, ether linkages and aliphatic chain in the char, which could produce more free radicals. The free radicals could stabilize the fragments produced in the pyrolysis, and lead to more CH4 generated and involved. Therefore, the CH4 yield is higher under CO than it in N2 . The CH4 yield increases by 12. 5% under CO compared with N2 at 900℃ and 1. 0 MPa. The CH4 yield increases with raise of temperature and pressure.