Ni/Al_2O_3催化剂上甲烷部分氧化制合成气反应积炭的研究

在固 体床流动 反应装置 上考察 了 Ｎｉ／ γ Ａｌ２ Ｏ３ 催化 甲烷 部分 氧化 制合 成 气反 应过 程 中的积炭问 题． 结 果表明 ：反应床 层温度升 高，积炭 量降 低；温 度降 低，积 炭量 增加， 当温 度在 ６００ ℃附近时，积 炭量增 加很快． 积炭产 生位于 催化剂床 层出口段 ． 随 着压力的 增加，催 化剂 积炭 量增 加很快． 当空速超 过一定 值时，随 着空速的 增加，催 化剂积 炭量 减少 ，说明 积炭 产生 过 程受 动力 学 影响很大． 根据反 应体系 的热力学 分析与 各种反应 条件对催 化剂积 炭的影响 得出甲 烷部分催 化氧化制合成气 反应体 系中的积 炭主要是 由 Ｃ Ｏ 歧 化和 Ｃ Ｏ＋ Ｈ２ 还 原反应 产生，而不 是 Ｃ Ｈ４ 的裂解

载体对甲烷催化部分氧化制合成气的影响

运用固定床流动反应装置、ＴＰＲ和ＸＲＤ等手段考察了载体的晶相组成、比表面和孔结构等性质对Ｎｉ基催化剂在甲烷部分氧化制合成气中反应性能的影响。结果表明，热稳定性好、导热好的惰性材料如（Ｃａ）ＭｇＡｌ２Ｏ４等是甲烷部分氧化制合成气理想的催化剂载体。载体必须具有适当的比表面和孔结构，以利于反应物分子在催化剂表面吸附并与活性中心充分接触，同时也有利于产物分子脱附并离开催化剂表面，防止副反应（积碳反应和燃烧反应）的发生，及时把反应热移走，避免热点产生使催化剂失活。另外还发现，具有不同比表面和孔结构的催化剂具有不同的最佳空

Preparation, Physico - Chemical Behavior and Catalytic Property For Ammonia Oxidation of Perovskite Like Mixed Oxides La_(2-x)Sr_xCuO_(4 -λ)

合成了X值不同的lA_(2-X)Sr_XCuO_(4-λ)(X=0~1)系列复合氧化物,用Xrd研究了这一系列氧化物的结构,结果表明X在0~0.3之间可形成k_2nIf_4结构单相化合物.用化学分析方法测定了过渡金属Cu的价态及含量,并计算出复合氧化物中的非计量氧数.用TPd,TPr,Tg,XPS,SEM等方法研究了这类复合氧化物的氧化还原性能,所含氧种及表面形态,考察了对nH3氧化的催化活性,并对其催化活性与化学组成及结构的关系进行了讨论.A series of Sr2+ doped perovskite like oxides La2-xSrxCuO4-λ (x=0 -- 1) were prepared, the structure, lattice parameters, content of Cu3+ , oxygen vacancies created by Sr2+ substitution and composition of these complex oxides were studied by XRD and iodic titration method.The redox ability, active oxygen species and surFace image were evaluated and analyzed with TPD,TG,XPS and SEM measurements.The catalytic activity For ammonia oxidation over these oxides was tested, and the relationship among the catalytic properties, structure, nonstoichiometric oxygen,redox ability and surFace behavior were correlated and some inFormation on the mechanism of ammonia oxidation was obtained

Synthesis and Electrochemical Characteristics of Nickel-based Complex Oxide Li_aNi_(0.78)Co_(0.2)Cd_(0.02)O_2

　以LiOH·H2O,含镉球状Ni(OH)2和Co2O3为原料,采用改进固相反应法合成镍系复合氧化物LiaNi0.78Co0.2Cd0.02O2锂离子电池正极材料,并通过ICP＿AES,XRD,SEM,TEM及电化学性能测试对该材料进行表征.实验表明,由Co和Cd部分取代Ni元素的复合正极材料LiaNi0.78Co0.2Cd0.02O2仍具有较完好的层状结构,表面分布均匀,颗粒粒径分布窄,且电化学性能稳定.常温下具有较高的可逆容量和优异的循环稳定性,其可逆容量最高达157.8mAh/g,循环50次后容量仍保持138.3mAh/g左右.The nickel_based complex oxide LiaNi0.78Co0.02O2 cathode materials for lithium_ion rechargeable batteries was synthesized by the improved solid_state reaction method with LiOH·H2O, ball_like Cd_doped Ni(OH)2 and Co2O3 as raw materials. The analysis ICP_AES proved that the as_prepared compounds were near the stoichiometric form. The XRD, SEM and electrochemical characteristics testing were also carried out. The results showed that the complex cathode material LiaNi0.78Co0.2Cd0.02O2 has layered structure, homogeneous surface distributions,uniform particles with good crystal morphology as well as stable electrochemical performances. At ambient temperature the resulted materials have a high reversible capacity and good cycling stability.Its highest initial reversible capacity is more than 157.8 mAh/g and still kept at 138.3 mAh/g after 50 continuous cycles.作者联系地址：中国科学院成都有机化学研究所,中国科学院成都有机化学研究所,中国科学院成都有机化学研究所 四川成都610041 ,四川成都610041 ,四川成都610041Author's Address: Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041,Chin

Study on the Hydrogenation of CO_2 over YBa_2Cu_3O_(6--7) Superconductor Catalyst

在ybA_2Cu_3O_(6~7)超导催化剂上进行CO_2加氢制醇的反应,研究了温度、压力和空速对催化剂活性和甲醇收率的影响.对催化剂进行了Xrd,原位fT-Ir,XPS,ESr和AfM表征,表明ybA_2Cu_3O_(6~7)在反应状态下被还原分解,铜主要被还原为Cu--+;CO_2加氢制醇的中间态可能为醛基、甲氧基;反应前催化剂粒度较大,反应后催化剂变得松散,粒度变小.The hydrogenation of CQj over YBa^Cu^O^.j superconductor catalyst was investigated using XRD, in - situ FT- IR, XPS, ESR, TPR and ATM techniques.It is shown that the CH3OH selectivity is directly proportional to the reaction pressure and space velocity, but is inversely proportional to the reaction temperature.The Cu2+ ions in YBa2Cu3O6--7 were mainly reduced to Cu+ in the presence of H2 and CO2.The intermediates in the catalytic reaction might be aldehyde and methoxy radical.During the hydrogenation the catalyst might be decomposed.国家自然科学基金(29573128);国家博士后科学资金资助课

Morphological comparison and analysis of the vesicle and receptacle of floating and attached Sargassum horneri in Shandong peninsula

铜藻(Sargassum horneri)是主要分布于北太平洋西部的暖温带性海藻,是我国海藻场的重要组成物种之一,对于海洋环境、渔业资源具有重要支撑作用。除底栖生活外,铜藻可营漂浮生活。气囊和生殖托是铜藻适应漂浮生活的重要结构,但是二者与漂浮生活相适应的结构特点尚研究有限。本文对漂浮铜藻和底栖铜藻气囊、生殖托的数量以及主要形态学特征进行了统计学分析,结果显示:漂浮铜藻气囊体积显著小于底栖铜藻(P<0.01),漂浮铜藻生殖托个数远少于底栖铜藻(P<0.01),推测铜藻为了适应漂浮生境,其漂浮能力和有性生殖能力已经发生改变

在甲烷部分氧化制合成气中Pt-Ni/Al_2O_3催化剂中的Pt-Ni协同作用机理(英文)

甲烷部分氧化制合成气的研究是在Ｎｉ／Ａｌ２Ｏ３催化剂上进行的。结果表明，添加少量的Ｐｔ可显著提高甲烷转化率和ＣＯ选择性并增加Ｎｉ／Ａｌ２Ｏ３催化剂的稳定性。通过ＸＲＤ、ＸＰＳ、ＴＰＲ和ＴＰＤ等表征手段发现，Ｐｔ－Ｎｉ／Ａｌ２Ｏ３催化剂中形成了Ｐｔ－Ｎｉ合金，Ｐｔ在催化剂表面富集。分析ＴＰＲ和ＴＰＤ数据可知，Ｐｔ－Ｎｉ双金属的相互作用阻止了催化剂的烧结和Ｎｉ的流失，提高了催化剂的活性。另外，Ｐｔ－Ｎｉ的协同作用也抑制了催化剂表面积炭的产生

Synthesis of LiMn_2O_(4-δ) Cl_δ Cathode Material by Like-Sol-Gel Methode

本文以水合氢氧化锂 (LiOH .H2 O)、水合硝酸锰 (Mn(No3) 2 .6H2 O) ,水合氯化锂 (LiCl.H2 O)为原料 ,用类溶胶 凝胶法制备了LiMn2 O4 δClδ,并且以此作正极进行了电化学测试 .结果表明 ,掺氯的尖晶石LiMn2 O4 正极材料具有优异的稳定性 ,且循环稳定后 ,容量几乎没有衰减 .LiMn 2O 4 δ Cl δ was synthesized by like sol gel methode, with calculated LiOH.H 2O, Mn(No 3) 2.6H 2O and LiCl.H 2O, and made electrochemical test with these compounds as positive materials. Result demostrated that LiMn 2O 4 δ Cl δ cathode material has exellent stability and nearly no capacity loss after reaching stability.作者联系地址：中国科学院成都有机化学所功能材料开发中心!四川成都,610041,中国科学院成都有机化学所功能材料开发中心!四川成都,610041,中国科学院成都有机化学所功能材料开发中心!四川成都,610041,中国科学院成都有机化学所功能材料开发中心!四川成都,610041,中国科学院成都有机化学所功Author's Address: R & D Center for Functional Materials, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu,610041,Chin

Study on the hydrogenation of CO2 over YBa2Cu3O6 similar to 7 superconductor catalyst

The hydrogenation of CO2 over YBa2Cu3O6 similar to 7 superconductor catalyst was investigated using XRD, in - situ FT - IR, XPS, ESR, TPR and AFM techniques. It is shown that the CH3OH selectivity is directly proportional to the reaction pressure and space velocity, but is inversely proportional to the reaction temperature. The Cu2+ ions in YBa2Cu3P6 similar to 7 were mainly reduced to Cu+ in the presence of H-2 and CO2. The intermediates in the catalytic reaction might be aldehyde and methoxy radical. During the hydrogenation the catalyst might be decomposed