实验研究了水蒸气对低浓度甲烷在Cu/γ-Al2O3催化剂上燃烧特性的影响规律,考察了低浓度甲烷转化率随水蒸气浓度的变化规律、催化剂的耐水稳定性及再生特性,通过催化剂的微观结构观测探讨了水蒸气对低浓度甲烷催化燃烧的抑制机理.结果表明,随着水蒸气浓度的增加,催化剂的催化活性逐渐降低,空气吹扫可使催化剂活性部分恢复;水蒸气存在的情况下,催化剂表面存在烧结,但烧结的程度受到温度和蒸汽浓度两方面的作用.水蒸气抑制作用的原因是水分子吸附在催化剂表面,占据活性位,并生成表面羟基,阻碍甲烷与催化剂的接触.
参考文献
| [1] | 杨仲卿,张力,唐强.超低浓度煤层气能源化利用技术研究进展[J].天然气工业,2010(02):115-118. |
| [2] | Zhongqing Yang;John R. Grace;C. Jim Lim;Li Zhang .Combustion of Low-Concentration Coal Bed Methane in a Fluidized Bed[J].Energy & Fuels,2011(Mar./Apr.):975-980. |
| [3] | 杨仲卿,张力,郑世伟,郭名女.超低浓度甲烷在流化床中催化燃烧的流动特性[J].工程热物理学报,2013(03):484-487. |
| [4] | Eriksson S;Boutonnet M;Jaras S .Catalytic combustion of methane in steam and carbon dioxide-diluted reaction mixtures[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2006(0):95-101. |
| [5] | Beata Stasinska;Andrzej Machocki;Katarzyna Antoniak .Importance of palladium dispersion in Pd/Al2O3 catalysts for complete oxidation of humid low-methane-air mixtures[J].Catalysis Today,2008(2/4):329-334. |
| [6] | 张力,张俊广,杨仲卿,唐强.超低浓度甲烷在Cu/γ-Al2O3催化颗粒流化床中的燃烧特性[J].燃料化学学报,2012(07):886-891. |
| [7] | QIAO Dongsheng,LU Guanzhong,GUO Yun,WANG Yanqin,GUO Yanglong.Effect of water vapor on the CO and CH4 catalytic oxidation over CeO2-Mox (M=Cu, Mn, Fe, Co, and Ni) mixed oxide[J].稀土学报（英文版）,2010(05):742-746. |
| [8] | 银凤翔,季生福,陈能展,赵丽萍,王伟,李成岳,刘辉.Ce1-xCuxO2-x/Al2O3催化剂的制备及其甲烷催化燃烧性能[J].化工学报,2006(04):744-750. |
| [9] | Aguila G;Gracia F;Cortes J;Araya P .Effect of copper species and the presence of reaction products on the activity of methane oxidation on supported CuO catalysts[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(3/4):325-338. |
| [10] | Persson K;Pfefferle LD;Schwartz W;Ersson A;Jaras SG .Stability of palladium-based catalysts during catalytic combustion of methane: The influence of water[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2007(3/4):242-250. |
| [11] | Ryuji Kikuchi;Koichi Eguchi;Shingo Maeda;Kazunari Sasaki;Stefan Wennerstrom .Low-temperature methane oxidation over oxide-supported Pd catalysts: inhibitory effect of water vapor[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2002(1/2):23-28. |
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：
-
10%
-
20%
-
30%
-
40%
-
50%