γ射线辐照对煤中自由基浓度变化和电解加氢液化的影响  

Influence of γ-rays radiation on free radical and electrochemical hydrogenation of coal

作　　者：刘艳兰[1] 周尉[1] 王锦花[2] 郭冰峰[1] 印仁和[1] 

机构地区：[1]上海大学化学系,上海200444 [2]上海大学环境与化学工程学院,上海201800

出　　处：《燃料化学学报》2014年第1期26-30,共5页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(20873083;21173144);国家重点化学工程联合实验室基金(SKLCHE-08A01);上海大学研究生创新基金(SHUCX112038)

摘　　要：利用电子顺磁共振(ESR)波谱仪对γ射线辐照前后的煤样进行了自由基的测试,结合气相色谱分析研究了辐照对煤结构的影响,并对辐照前后的煤样进行了电化学测试。结果表明,辐照可以促进煤中大分子烷烃链及杂原子的断裂,并产生氢气、甲烷等小分子量的气体,当辐照剂量为40 kGy时,自由基浓度达到最大。而自由基浓度的增大有利于煤的电解加氢液化,且当辐照剂量为40 kGy时,电流密度达到最大。Coal samples were activated using a γ-ray as an irradiation source. Electro spin resonance （ESR）, gas chromatography （GC） and linear sweep voltammetry （LSV） were employed to investigate the effects of γ-rays radiation on the change of free radical and structure of coal. The results show that γ-rays irradiation could promote the cleavage of alkane chains and heteroatoms in coal, leading the generation of free radicals and gas with low molecular weight, such as hydrogen, methane and ethane. Radical concentration reaches the maximum at 40 kGy. The increase of free radical could improve the electro-reduction of coal. The current density is reached the maximum at 40 kGy.

关 键 词：煤 自由基 气相 液化 &gamma -辐照 

分 类 号：TQ530[化学工程—煤化学工程]