镍基催化剂上稻草水蒸气重整制富氢合成气(英文)  

Catalytic steam reforming of rice straw biomass to hydrogen-rich syngas over Ni-based catalysts

作　　者：李庆远[1] 季生福[1] 胡金勇[1] 蒋赛[1] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《催化学报》2013年第7期1462-1468,共7页

基　　金：supported by the National Basic Research Program of China(973 Program,2005CB221405);the National High Technology Research and Development Program of China(863 Program,2006AA10Z425)~~

摘　　要：采用浸渍法制备了SiO2,γ-Al2O3,CaO和TiO2负载的Ni催化剂,以及不同MgO含量的MgO-7.5%Ni/γ-Al2O3催化剂,利用X射线衍射和N2吸附-脱附技术表征了催化剂的结构,在固定床反应器上评价了它们在稻草水蒸气催化重整制合成气反应中的催化性能,考察了反应条件对催化剂性能的影响.结果表明,以γ-Al2O3为载体时Ni催化剂活性最高,其中7.5%Ni/γ-Al2O3催化剂的H2收率可达1071.3ml/g,H2:CO的体积比为1.4:1;同时,MgO的添加进一步提高了该催化剂的性能,当MgO含量为1.0%时,H2收率可达1194.6ml/g,H2:CO体积比可达3.9:1.可见MgO的加入促进了Ni基催化剂上稻草水蒸气催化重整制合成气反应的进行,同时使得合成气中CO发生水-汽转换反应,从而大大提高了合成气中H2含量.Ni-based catalysts with SiO2, γ-Al2O3, CaO, and TiO2 as supports and MgO-7.5% Ni/γ-Al2O3 catalysts with different contents of MgO were prepared. The structure of the catalysts was characterized by powder X-ray diffraction and N2 adsorption-desorption measurements. The performance of the catalysts in the steam reforming of rice straw biomass to syngas was evaluated. The effects of reaction conditions on the activity of the catalysts were also investigated. Ni-based catalysts supported on γ-Al2O3 had higher catalytic activity than the catalysts supported on TiO2, CaO, and SiO2. The yield of H2 reached 1071.3 ml H2/g biomass and the ratio of H2 to CO was 1.4：1 over a 7.5% Ni/γ-Al2O3 catalyst. Addition of MgO to the 7.5% Ni/γ-Al2O3 catalyst improved its catalytic activity. The yield of H2 reached 1194.6 ml H2/g biomass and the ratio of H2 to CO was 3.9：1 over the 1.0% MgO-7.5% Ni/γ-Al2O3 catalyst. MgO not only improves the steam reforming reaction of Ni-based catalysts, but can also promote the water-gas shift reaction. This method shows promise for production of H2-rich syngas from biomass.

关 键 词：镍基催化剂 稻草 水蒸气重整 合成气 氢气 

分 类 号：TE665.3[石油与天然气工程—油气加工工程] O643.32[理学—物理化学]