CN114990595A - 一种制氢系统 - Google Patents
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Abstract
本发明属于制氢设备技术领域,公开了一种制氢系统,包括阴极采用MoC‑Mo2C异质结涂层析氢电极,阳极采用硼掺杂金刚石电极的电解水装置、氢气收集系统和臭氧净化系统,通过特有的构造,实现了制氢的同时充分利用副产品进行污水处理,适于在环保绿色能源产业推广应用。
Description
技术领域
本发明属于制氢设备技术领域,具体公开了一种制氢系统。
背景技术
开发和有效利用可再生能源己经成为世界各国能源发展战略的重要组成部分,氢能被广泛认为是成功实现能源转型和净零目标的重要途径,将在全球变暖限制在1.5℃方面起着核心作用。预计到2050年,氢能的应用可累计减少800亿吨二氧化碳排放,占所需总减排量的20%。同时,利用太阳能、风能等可再生能源电力电解水制氢(绿氢),形成完整的绿色能源网络,是实现间歇性能源高效存储和绿色利用(氢氧燃料电池等)的重要途径。
现有的制氢设备功能单一,在如何高效制取更纯的氢能源方向进行技术拓展,一套设备不能满足既节能又减排的要求,往往一个环保企业既上了制氢设备,又要上减排设备,且两者之间不能兼容,造成场地资源、物料资源的浪费,制氢产生的副产品还会对大气造成二次污染。
发明内容
为解决背景技术中的问题,本发明提供一种制氢系统,具体技术方案如下:
一种制氢系统,包括电解水装置、与所述电解水装置的阴极出口连通的氢侧气液分离器,还包括与所述电解水装置的阳极出口连通的臭氧侧气液分离器,和与所述臭氧侧气液分离器的出口通过管道连通的高级氧化池,所述电解水装置的阴极采用MoC-Mo2C异质结涂层析氢电极,所述电解水装置的阳极采用硼掺杂金刚石电极。
上述技术方案中,通过高级氧化池收集制氢产生的副产品-臭氧用于排污水的无害化处理,在完成制氢的同时,利用其副产品导入另一种环保工艺,节能减排,一举两得。
优选的,所述管道从高级氧化池的底部连通,所述高级氧化池顶部收集的尾气经尾气破坏系统进行无害化处理后与大气连通。
电解产生的O3从池底通入曝气搅拌,并与加入的微电解填料协同产生强氧化性自由基,O3以及催化产生的·OH等可以破坏染料生色团,氧化分解水中的污染物,达到降低污水色度,提高污水可生化性,去除污染物的目的。
优选的,所述管道采用不含碳的铬铁合金,密封材料采用耐腐蚀能力强的硅橡胶或添加耐酸剂的橡胶制品。
这样选材制造管道主要是为了应对臭氧强氧化性对设备的腐蚀。
优选的,所述无害化处理为加热、催化分解。
系统产生的尾气含有O3和反应产生的气体污染物等,经尾气破坏器加热、催化分解后排放,这种方式简单便捷,能快速完成尾气的无害化处理。
附图说明
图1为本发明实施例中制氢工艺流程图;
图2为本发明实施例中电解水装置结构示意图;
具体实施方式
为使本发明的目的、技术方案和优点更加清楚,下面结合附图及具体实施例对本发明进行描述。显然,所描述的实施例仅仅是本发明的一部分实施例,而不是全部的实施例。基于该实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
在酸性介质中通过电解水,阴极处析氢产生氢气,阳极处析出氧气产生臭氧。主要反应:
阴极:2H++2e-==H2 (Eo=0.00V)
阳极:3H2O==O3+6H++6e- (Eo=1.51V)
2H2O==O2+4H++4e- (Eo=1.23V)(副反应)
阳极发生氧化反应产生臭氧的同时还存在析出氧气的竞争反应,析氧副反应是目前臭氧发生效率不高的主要原因,因此阳极材料需要有较高的析氧过电位。同时,湿态的Nafion膜具有强酸性(pH等同于10%的H2SO4溶液),在电解过程中会产生极高的界面酸浓度导致电极材料的溶解和钝化,因此阳极材料还需要有高化学稳定性。经调研,硼掺杂金刚石(BDD)材料具有良好的导电性,高析氧过电位,高化学稳定性,低背景电流等优点,最终选为阳极材料。
臭氧/微电解协同反应过程主要包括臭氧分子的氧化、铁离子催化的臭氧氧化、微电解填料的氧化还原。亚铁离子和铁离子之间的相互转化会降低填料中铁离子的溶出,进而延长填料的使用寿命。催化剂的存在又会增加臭氧的利用效率,产生更多的·OH,提高工艺的氧化性。反应过程如下:
O3+OH-→·O2+·HO2
O3+·HO2→2O2+·OH
Fe2++O3→Fe3++·O3 -
·O3 -+H+→O2+·OH
Fe2++O3→FeO2++O2
FeO2+H2O→Fe3++·OH+OH-
Fe3++O3+H2O→FeO2++H++·OH+O2
2·HO2→H2O2+O2
Fe2++H2O2→Fe3++·OH+OH-
Fe3++H2O2→Fe2++H++·HO2
参见图1,本实施例通过氢侧气液分离器从该电解水装置阴极收集氢气储存,通过臭氧侧气液分离器从该装置阳极收集臭氧后投入高级氧化池进行废水处理,尾气经加热分解后排入大气,此处的电解水装置为H型电解器,其结构如图2所示。
其中,电解水装置阳极采用硼掺杂金刚石(BDD)电极,阴极采用MoC-Mo2C异质结涂层析氢电极。
氢气收集设施还包括流量计、燃料电池、蓄电池,氢气可用于燃料电池应急临时使用,或加入储氢站。
其中,臭氧高级氧化部分包括调蓄池、高级氧化池、尾气破坏系统。印染废水由调蓄池输送到高级氧化池,电解产生的O3从池底通入曝气搅拌,并与加入的微电解填料协同产生强氧化性自由基,O3以及催化产生的·OH 等可以破坏染料生色团,氧化分解水中的污染物,达到降低污水色度,提高污水可生化性,去除污染物的目的。系统产生的尾气含有O3和反应产生的气体污染物等,经尾气破坏器加热、催化分解后排放。考虑到臭氧强氧化性对设备的腐蚀,所用O3收集管道采用不含碳的铬铁合金,密封材料采用耐腐蚀能力强的硅橡胶或添加耐酸剂的橡胶制品。
考虑到臭氧强氧化性对设备的腐蚀,所用O3收集管道采用不含碳的铬铁合金,密封材料采用耐腐蚀能力强的硅橡胶或添加耐酸剂的橡胶制品。
本发明的优点在于:
1、本发明装置耦合电解水制氢系统和废水处理系统,获得高性能制氢去污一体化电解器,充分利用传统电解水制氢中忽略的阳极功能,提高了能量传递效率;
2、本发明利用可再生能源和CO2制备的高效析氢阳极催化剂-MoC- Mo2C复合电极,相较于铂基贵金属催化剂降低了成本,为减少碳足迹并加快氢能的利用提供了一种可持续的方式;
3、本发明阳极利用性能良好的硼掺杂金刚石电极,产生Ozone(臭氧),氧化有机物,达到去污效果。阳极产生的臭氧不纯且不稳定,但用于去污则绰绰有余,扬长避短获得较好效果;
4、装置采用模块化设计,各部分相对独立又紧密结合,便于拆卸组装。
最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (4)
1.一种制氢系统,包括电解水装置、与所述电解水装置的阴极出口连通的氢侧气液分离器,其特征在于,还包括与所述电解水装置的阳极出口连通的臭氧侧气液分离器,和与所述臭氧侧气液分离器的出口通过管道连通的高级氧化池,所述电解水装置的阴极采用MoC-Mo2C异质结涂层析氢电极,所述电解水装置的阳极采用硼掺杂金刚石电极。
2.如权利要求1所述的一种制氢系统,其特征为:所述管道从高级氧化池的底部连通,所述高级氧化池顶部收集的尾气经尾气破坏系统进行无害化处理后与大气连通。
3.如权利要求1或2中任一项所述的一种制氢系统,其特征为:所述管道采用不含碳的铬铁合金,密封材料采用耐腐蚀能力强的硅橡胶或添加耐酸剂的橡胶制品。
4.如权利要求2所述的一种制氢系统,其特征为:所述无害化处理为加热、催化分解。
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CN116656451A (zh) * | 2023-05-30 | 2023-08-29 | 北京氢润科技有限公司 | 活性氢原子酒的制备设备及方法 |
TWI839078B (zh) | 2023-01-16 | 2024-04-11 | 國立臺北科技大學 | 充氫鐵合金的製備方法 |
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TWI839078B (zh) | 2023-01-16 | 2024-04-11 | 國立臺北科技大學 | 充氫鐵合金的製備方法 |
CN116656451A (zh) * | 2023-05-30 | 2023-08-29 | 北京氢润科技有限公司 | 活性氢原子酒的制备设备及方法 |
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