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Boosting hydrogen production of ammonia decomposition via the construction of metal-oxide interfaces SCIE CSCD
期刊论文 | 2024 , 43 (2) | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
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Abstract :

The ammonia decomposition for the production of carbon-free hydrogen has triggered great attention yet still remains challenging due to its sluggish kinetics, posting the importance of precise design of efficient catalysts for ammonia decomposition under low temperatures. Constructing the metal-support interaction and interface is one of the most important strategies for promoting catalysts. In this work, by coating ceria onto the Ni nanoparticles (NPs), we discover that the Ni-CeO2 interfaces create an exceptional effect to enhance the catalytic decomposition of ammonia by over 10 folds, compared with the pristine Ni. The kinetic analysis demonstrates that the recombinative N2 desorption is the rate-determining step (RDS) and the Ni-CeO2 interface greatly increases the RDS. Based on these understandings, a strategy to fabricate the Ni/CeO2 catalyst with abundant Ni-Ce-O interfaces via one-pot sol-gel method was employed (hereafter denoted to s-Ni/CeO2). The s-Ni/CeO2 catalyst shows a high activity for ammonia decomposition, achieving a H2 formation rate of 10.5 mmol gcat-1 min-1 at 550 degrees C. Combined with a series of characterizations, the relationship between the catalyst structure and the performance was investigated for further understanding the effect of metal-oxide interfaces.

Keyword :

Ammonia decomposition Ammonia decomposition Cerium oxide Cerium oxide Metal -oxide interfaces Metal -oxide interfaces Metal-support interaction Metal-support interaction Nickel Nickel

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GB/T 7714 Chen, Jiangping , Ren, Hongju , Wu, Kai et al. Boosting hydrogen production of ammonia decomposition via the construction of metal-oxide interfaces [J]. | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY , 2024 , 43 (2) .
MLA Chen, Jiangping et al. "Boosting hydrogen production of ammonia decomposition via the construction of metal-oxide interfaces" . | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY 43 . 2 (2024) .
APA Chen, Jiangping , Ren, Hongju , Wu, Kai , Fang, Huihuang , Chen, Chongqi , Lin, Li et al. Boosting hydrogen production of ammonia decomposition via the construction of metal-oxide interfaces . | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY , 2024 , 43 (2) .
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一种逆流整体式催化燃烧与吸热反应耦合的反应系统 incoPat
专利 | 2022-04-15 00:00:00 | CN202210396416.4
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本发明提出一种逆流整体式催化燃烧与吸热反应耦合的反应系统,所使用的整体式催化燃烧‑吸热反应耦合反应器呈竖向的柱形体,其底端处设有可燃气体入口,顶部设有原料气入口,柱形体内整体式催化燃烧固定反应床与吸热反应床均呈环形柱状,两者的环层以交替套叠方式形成套层耦合结构;可燃气体经第二换热器预热至催化燃烧反应温度后,进入整体式催化燃烧固定反应床环层燃烧并加热吸热反应床环层,其燃烧尾气返回第二换热器作为热源冷却后排出;所述原料气经第一换热器预热后进入吸热反应床环层进行反应,其气态反应产物经吸热反应床的产物出口返回第一换热器作为热源冷却后输入收集装置储存;本发明能够将低浓度可燃气体治理与吸热反应相互结合。

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GB/T 7714 蔡国辉 , 王智雄 , 林立 et al. 一种逆流整体式催化燃烧与吸热反应耦合的反应系统 : CN202210396416.4[P]. | 2022-04-15 00:00:00 .
MLA 蔡国辉 et al. "一种逆流整体式催化燃烧与吸热反应耦合的反应系统" : CN202210396416.4. | 2022-04-15 00:00:00 .
APA 蔡国辉 , 王智雄 , 林立 , 罗宇 , 陈崇启 , 肖益鸿 et al. 一种逆流整体式催化燃烧与吸热反应耦合的反应系统 : CN202210396416.4. | 2022-04-15 00:00:00 .
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一种吸附剂对于氨气的循环吸附性能测试装置 incoPat
专利 | 2022-03-29 00:00:00 | CN202210325571.7
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本发明提出一种吸附剂对于氨气的循环吸附性能测试装置,用于对氨气吸附剂的吸附性能进行测试,所述测试装置包括放置待测的氨气吸附剂的吸附装置,还包括与吸附装置输入端相连的多个原料气装置;各原料气装置的输出端处设有用于控制原料气出口压力的压力控制装置,还设有用于检测和控制原料气出口流量的流量控制装置;吸附装置的输出端处设有用于检测通过吸附装置后的氨气浓度的氨气浓度检测装置;所述吸附装置包括温度控制装置;所述温度控制装置可对氨气吸附剂进行活化处理,或是在氨气吸附剂再生过程时进行温度控制;本发明能解决现有的氨气吸附性能测试方式的测试结果的准确性较差速度较慢的问题,同时还能测试其循环吸附性能。

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GB/T 7714 陈崇启 , 李科重 , 罗宇 et al. 一种吸附剂对于氨气的循环吸附性能测试装置 : CN202210325571.7[P]. | 2022-03-29 00:00:00 .
MLA 陈崇启 et al. "一种吸附剂对于氨气的循环吸附性能测试装置" : CN202210325571.7. | 2022-03-29 00:00:00 .
APA 陈崇启 , 李科重 , 罗宇 , 林立 , 江莉龙 . 一种吸附剂对于氨气的循环吸附性能测试装置 : CN202210325571.7. | 2022-03-29 00:00:00 .
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一种节能型现场制氢加氢站系统 incoPat
专利 | 2022-03-31 00:00:00 | CN202210327645.0
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Abstract :

本发明公开了一种节能型现场制氢加氢站系统,属于氢能利用领域,其特征在于通过将氨分解现场制氢与加氢站相结合,优化系统配置,实现制氢加氢过程的节能降耗,从而降低氢气的储运成本。其中,高压氢气冷却装置与加注装置相结合,在加注装置节流后对氢气进行冷却,降低冷源的温度要求,从而提高制冷循环COP以节约电耗;冷却装置所需冷量来自氨制冷循环,可实现制冷工质量的灵活调节,并结合双效吸收式制冷循环,充分利用制氢工艺中的尾气热值,提高系统能效;采用液氨泵实现高压条件下制氢工艺,节约氢气纯化与加氢工段的能耗。

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GB/T 7714 林立 , 罗俊聪 , 江莉龙 et al. 一种节能型现场制氢加氢站系统 : CN202210327645.0[P]. | 2022-03-31 00:00:00 .
MLA 林立 et al. "一种节能型现场制氢加氢站系统" : CN202210327645.0. | 2022-03-31 00:00:00 .
APA 林立 , 罗俊聪 , 江莉龙 , 罗宇 , 陈崇启 . 一种节能型现场制氢加氢站系统 : CN202210327645.0. | 2022-03-31 00:00:00 .
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一种用于氨分解制氢Ru基催化剂及其制备方法 incoPat
专利 | 2022-03-30 00:00:00 | CN202210322181.4
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Abstract :

本发明涉及了一种用于氨分解制氢Ru基催化剂及其制备方法,该催化剂包括活性组分和载体;所述活性组分为活性金属钌,所述载体为碳层包覆二氧化硅;该催化剂通过引入碳层修饰SiO2作为氨分解催化剂的载体,所制备的催化剂表面碱性较强,同时载体与活性金属之间形成很强的相互作用;有利于增强载体与活性金属之间的电子转移,减弱活性组分与NH3的分解产物NH2、N或H之间的相互作用,促进活性组分与载体之间的电子转移以及生成物N2和H2的脱附,提高催化剂的低温活性,提高氨分解效率。

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GB/T 7714 罗宇 , 欧阳东 , 陈崇启 et al. 一种用于氨分解制氢Ru基催化剂及其制备方法 : CN202210322181.4[P]. | 2022-03-30 00:00:00 .
MLA 罗宇 et al. "一种用于氨分解制氢Ru基催化剂及其制备方法" : CN202210322181.4. | 2022-03-30 00:00:00 .
APA 罗宇 , 欧阳东 , 陈崇启 , 江莉龙 , 林立 . 一种用于氨分解制氢Ru基催化剂及其制备方法 : CN202210322181.4. | 2022-03-30 00:00:00 .
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一种用于氨分解的微通道反应器 incoPat
专利 | 2022-07-04 00:00:00 | CN202210781227.9
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Abstract :

本发明公开了一种用于氨分解的微通道反应器,包括反应器壳体、壳盖和换热反应微管,反应器壳体上设置有热介质进口、热介质出口、氨气进料口和氨气分解出料口,壳内换热反应微管的两端分别为第一管板和第二管板,两管板将反应器壳体内划分为第一管箱、换热反应腔和第二管箱,换热反应微管均匀布置在换热反应腔内,并在换热反应微管内加装有用于氨气分解的催化剂,氨气进料口和氨气分解出料口均设置在第一管箱上,并与第一管箱内导通;换热反应腔内还设有回流管,回流管的一端穿越第二管板与第二管箱导通,其另一端穿过第一管板并伸出第一管箱后与氨气分解出料口连通。本发明同时具有换热和氨分解功能,优化了结构,具有成本低、结构紧凑、体积小、换热反应效率高、启动速度快、壳盖可拆卸以及清洁维护方便的优势。

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GB/T 7714 江莉龙 , 王大彪 , 林立 et al. 一种用于氨分解的微通道反应器 : CN202210781227.9[P]. | 2022-07-04 00:00:00 .
MLA 江莉龙 et al. "一种用于氨分解的微通道反应器" : CN202210781227.9. | 2022-07-04 00:00:00 .
APA 江莉龙 , 王大彪 , 林立 , 罗宇 , 陈崇启 , 张卿 . 一种用于氨分解的微通道反应器 : CN202210781227.9. | 2022-07-04 00:00:00 .
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一种太阳能驱动的分布式能源系统 incoPat
专利 | 2022-01-06 00:00:00 | CN202210011259.0
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本发明提出一种太阳能驱动的分布式能源系统,其特征在于:所述能源系统的供氢机构包括氨压缩式制冷循环系统和用于产氢的氨分解膜反应器;所述氨分解膜反应器的电炉电源、氨压缩式制冷循环系统的压缩机电源均包括光伏组件的太阳能光伏板,氨分解膜反应器催化剂床层的热源包括光伏组件的太阳能集热器;氨压缩式制冷循环系统的第一蒸发器提供用于冷却光伏组件的冷量,第二蒸发器则用于冷却氨分解产物;本发明能克服现有氨制氢工艺需要的较高温度水平的难题,并能利用氨制氢反应器的压力实现对氢气纯化。

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GB/T 7714 林立 , 王陆强 . 一种太阳能驱动的分布式能源系统 : CN202210011259.0[P]. | 2022-01-06 00:00:00 .
MLA 林立 et al. "一种太阳能驱动的分布式能源系统" : CN202210011259.0. | 2022-01-06 00:00:00 .
APA 林立 , 王陆强 . 一种太阳能驱动的分布式能源系统 : CN202210011259.0. | 2022-01-06 00:00:00 .
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一种具有氨气预加热功能的氨分解反应器 incoPat
专利 | 2022-06-21 00:00:00 | CN202210707426.5
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本发明公开了一种具有氨气预加热功能的氨分解反应器,包括换热器本体和反应器本体,换热器本体包覆在反应器本体外侧;换热器本体上的换热管设置在换热壳体内,其一端与氨气换热进口连通,另一端与氨气换热出口连通,换热器本体上的热媒进口和热媒出口分别与换热壳体导通;反应器本体上的催化剂管设置在反应壳体内,换热器本体上的氨气换热出口与反应器本体上的氨气进口连通,氨气进口和氨气分解气出口之间通过催化剂管连通,氨气分解气出口与换热器本体上的热媒进口连通。本发明结构紧凑,采用反应器中氨气分解气的高温气体作为换热器的热介质,给氨气提供热量进行预热,使得进入反应器的氨气处于高温状态,在反应器内进行的氨分解反应更充分。

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GB/T 7714 江莉龙 , 王大彪 , 罗宇 et al. 一种具有氨气预加热功能的氨分解反应器 : CN202210707426.5[P]. | 2022-06-21 00:00:00 .
MLA 江莉龙 et al. "一种具有氨气预加热功能的氨分解反应器" : CN202210707426.5. | 2022-06-21 00:00:00 .
APA 江莉龙 , 王大彪 , 罗宇 , 张卿 , 陈崇启 , 林立 . 一种具有氨气预加热功能的氨分解反应器 : CN202210707426.5. | 2022-06-21 00:00:00 .
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一种用于氨分解的钙钛矿型催化剂及其制备方法和应用 incoPat
专利 | 2022-02-15 00:00:00 | CN202210135768.4
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本发明公开了一种用于氨分解的钙钛矿型催化剂及其制备方法和应用,该催化剂包括活性组分和载体,所述活性组分为过渡金属Ni,载体为钙钛矿型氧化物La1‑xCexAlO3;载体采用柠檬酸溶胶‑凝胶法制备,采用等体积浸渍法负载活性组分Ni。首先以硝酸铈、硝酸镧、硝酸铝、柠檬酸为原料,经油浴、干燥、焙烧得到La1‑xCexAlO3载体;然后以硝酸镍溶液为浸渍液,将浸渍烘干后的产物在管式炉中焙烧,得到最终产物。本发明通过引入稀土元素Ce对LaAlO3进行A位掺杂改性制备Ni基催化剂,促进催化剂金属‑载体间的协同作用,加速氨分解反应进行,从而表现出较优异的氨分解催化剂活性。

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GB/T 7714 詹瑛瑛 , 姚银花 , 周晨 et al. 一种用于氨分解的钙钛矿型催化剂及其制备方法和应用 : CN202210135768.4[P]. | 2022-02-15 00:00:00 .
MLA 詹瑛瑛 et al. "一种用于氨分解的钙钛矿型催化剂及其制备方法和应用" : CN202210135768.4. | 2022-02-15 00:00:00 .
APA 詹瑛瑛 , 姚银花 , 周晨 , 江莉龙 , 罗宇 , 林立 et al. 一种用于氨分解的钙钛矿型催化剂及其制备方法和应用 : CN202210135768.4. | 2022-02-15 00:00:00 .
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Modeling and simulation of dynamic characteristics of a green ammonia synthesis system SCIE
期刊论文 | 2023 , 300 | ENERGY CONVERSION AND MANAGEMENT
WoS CC Cited Count: 6
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Green ammonia production system driven by renewable electricity will be under frequent dynamic operation due to the fluctuation of renewable energy. The nonlinear dynamic model of a green ammonia synthesis system is developed and the dynamic responses of PEM (proton exchange membrane) electrolysis subsystem, PSA (Pressure swing adsorption) subsystem and ammonia synthesis subsystem during the start-up process and under the fluctuation of renewable electrical current are analyzed. The start-up dynamic results show that the hydrogen production rate of PEM electrolysis system is positively correlated to the current. The nitrogen output of PSA system is affected by the adsorption time, adsorption pressure, bed length, and air velocity. A start-up period of 300 min from the warmed-up state to the design state can maintain the temperature rise rate of the ammonia synthesis reactor at approximately 40 K/h. The dynamic results under step fluctuations of electrical current show that the PEM electrolysis subsystem and the PSA subsystem response fast compared to the ammonia synthesis reactor and buffer tanks. Using large buffer tanks to smooth the fluctuation allows the system to slide with the variation of renewable current to some extent, resulting in a higher outlet ammonia fraction when the current increases. Different volume ratios of the hydrogen tank to the nitrogen tank volume can lead to different variations of the hydrogen/nitrogen ratio. PID controllers can effectively maintain the bed temperatures, hydrogen/ nitrogen ratio, and pressure of the ammonia synthesis reactor at their set points despite fluctuations in renewable electrical current. Buffer tanks are necessary to compensate for the imbalance between the flow rate fluctuation caused by current change and the flow rate regulation caused by PID controllers.

Keyword :

Ammonia synthesis reactor Ammonia synthesis reactor Dynamic characteristics Dynamic characteristics Green ammonia synthesis Green ammonia synthesis PEM electrolysis PEM electrolysis PID control PID control Pressure swing adsorption Pressure swing adsorption

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GB/T 7714 Sun, Zhixin , Zhang, Yuanchao , Huang, Hongji et al. Modeling and simulation of dynamic characteristics of a green ammonia synthesis system [J]. | ENERGY CONVERSION AND MANAGEMENT , 2023 , 300 .
MLA Sun, Zhixin et al. "Modeling and simulation of dynamic characteristics of a green ammonia synthesis system" . | ENERGY CONVERSION AND MANAGEMENT 300 (2023) .
APA Sun, Zhixin , Zhang, Yuanchao , Huang, Hongji , Luo, Yu , Lin, Li , Jiang, Lilong . Modeling and simulation of dynamic characteristics of a green ammonia synthesis system . | ENERGY CONVERSION AND MANAGEMENT , 2023 , 300 .
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