欢迎登录材料期刊网

材料期刊网

高级检索

通过Ca基吸收剂的引入,将煤的气化反应、甲烷化反应和CO2吸收反应集成在同一反应器内,形成煤直接制甲烷系统,可缩短传统煤制甲烷系统流程,提高转化效率。分析了热力学平衡状态下温度、压力、Ca/C比和H20/C比对气体产物产量的影响。结果表明降低反应温度和提高反应压力有利于甲烷的产生,而Ca/C比和H2O/C比的选取存在最优值,得到了煤直接制甲烷体系较为适宜的反应条件为:500-700℃,5~10MPa,Ca/C=0.5,H20/C=1。

By the introduction of Ca-based CO2 absorbent, a new system of direct methane production from coal was developed, which integrated coal gasification, methanation, and CO2 absorption in one reactor. Comparing to the traditional coal-to-methane process, it would have a shorter process and higher conversion efficiency. The effects of temperature, pressure, Ca/C ratio, and H20/C ratio were analyzed in thermodynamic equilibrium model. The results showed that, the CH4 yield increased with reducing temperature and increasing pressure, and the selection of Ca/C ratio and H20/C ratio has an optimal value. The suitable range of reaction conditions for direct methane production from coal were at about 500-700℃, 5-10 MPa, Ca/C=0.5, H20/C=I.

参考文献

[1] 钱伯章,朱建芳.世界天然气供应和需求预测[J].天然气与石油,2006(02):44-48.
[2] Production of synthetic natural gas (SNG) from coal and dry biomass - A technology review from 1950 to 2009[J].Fuel,2010(8):P.1763.
[3] 刘保林,崔彦亭,何伯述.加氢气化炉内化学反应的热力学研究[J].洁净煤技术,2006(02):67-71.
[4] A. Zhang;M. Kaiho;H. Yasuda;M. Zabat;K. Nakano;O. Yamada .Fundamental studies on hydrogasification of Taiheiyo coal[J].Energy,2005(11/12):2243-2250.
[5] See Hoon Lee;Jae Goo Lee;Jae Ho Kim .Hydrogasification characteristics of bituminous coals in an entrained-flow hydrogasifier[J].Fuel,2006(5/6):803-806.
[6] S.K. Jeon;C.S. Park;C.E. Hackett .Characteristics of steam hydrogasification of wood using a micro-batch reactor[J].Fuel,2007(17/18):2817-2823.
[7] 王峰,田文栋,肖云汉.煤直接制氢实验研究[J].中国电机工程学报,2007(32):40-45.
[8] 闫跃龙,肖云汉,田文栋,王峰.含碳能源直接制氢的热力学分析与实验研究[J].工程热物理学报,2003(05):744-746.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%