{"id":68015,"date":"2023-05-08T15:21:00","date_gmt":"2023-05-08T15:21:00","guid":{"rendered":"https:\/\/discover.restek.com\/?p=68015"},"modified":"2025-12-11T00:23:13","modified_gmt":"2025-12-11T00:23:13","slug":"gas-generators-part-1-hydrogen-generators","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/zh-hans\/blog-fr\/gnbl4670\/gas-generators-part-1-hydrogen-generators","title":{"rendered":"Gas Generators\u2013Part 1\u2013Hydrogen Generators"},"content":{"rendered":"\n

Is your lab or business thinking about purchasing a hydrogen gas generator and would like to know more about the different models available from Restek and the maintenance they will require?  If so, hopefully this post will answer many of your questions\/concerns.<\/p>\n\n\n\n

But before we get started, have you ever wondered how a hydrogen generator works? <\/p>\n\n\n\n

Generally speaking, deionized water is introduced into a cell that consists of an anode (positive side) and a cathode (negative side).  At the anode, electricity splits the water molecules into oxygen and positive hydrogen ions (H+) via electrolysis.  A PEM (Proton Exchange Membrane) separates the anode (positive) and cathode (negative) electrodes.  Most of the oxygen molecules are vented to atmosphere while the positive hydrogen ions are drawn through the PEM towards the negative cathode electrode and via reduction (addition of electrons), the hydrogen ions (H+) become hydrogen molecules (H2). <\/p>\n\n\n\n

You may be asking yourself, for the hydrogen generators that are listed as PD, in addition to the PEM, what does PD represent?  PD represents a palladium purifier module, which helps to remove the trace amounts of oxygen molecules that were not initially vented (as described above) and have made their way through the PEM.  For this reason, Restek recommends a PEMPD hydrogen generator when the hydrogen gas must be exceptionally pure, such as when used for GC carrier gas.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

Several years ago I wrote a blog post that provided suggestions for selecting a hydrogen generator.  Need some help choosing a hydrogen generator?<\/a> <\/p>\n\n\n\n

As stated in this post, you will need to know the following information to select the most appropriate generator.<\/p>\n\n\n\n

    \n
  1. Required hydrogen gas purity.<\/li>\n\n\n\n
  2. Required flow rate and line pressure.<\/li>\n<\/ol>\n\n\n\n

    Once you have determined which type and capacity hydrogen generator will fit your needs, you will be able to determine which consumables are needed and the frequency of their replacement to properly maintain the generator.  But before we discuss the consumables, let\u2019s begin with the water source. <\/p>\n\n\n\n

    Water Source<\/strong><\/h2>\n\n\n\n

    If you selected one of the <\/strong>PEMPD (Proton Exchange Membrane\/Palladium purifier) from Parker, on page 3 of Parker\u2019s \u201cInstallation, Operation and Maintenance Manual\u201d <\/strong>for the PEMPD generators, the specifications for water quality are provided.  According to the manual, water quality is listed as \u201cDeionized, ASTM II, > 1M\u03a9, <1\u03bcS, Filtered to <100 \u03bcm.\u201d<\/em> The PEMPD Hydrogen Generator manual<\/strong> can be found here:  TI_H2PEMPD_E_H2_Gas_Gen.pdf <\/a><\/p>\n\n\n\n

    A separate product information sheet can be found here:  PIS-Hydrogen-Generators-For-GC-and-GC-MS-1.pdf <\/a><\/p>\n\n\n\n

    <\/div>\n\n\n\n

    Water produced by Restek part #\u00a022000<\/strong>, Parker\u2019s HydroGen Mate DI Water System, meets these specifications. \u00a0<\/p>\n\n\n

    \n
    \"\"<\/figure>\n<\/div>\n\n\n

    The HydroGen Mate DI Water System also meets the specifications for the PEM generators.  Unfortunately, it appears that Parker no longer offers a pdf of the User Guide for the PEM hydrogen generators<\/strong> on their website.  However, they do have a Market Application Publication sheet available. MAP_H2FuelGas_B.pdf <\/a><\/p>\n\n\n\n

    Daily System\/Generator Check List<\/strong><\/h2>\n\n\n\n
      \n
    1. Check that the power ON indicator is illuminated.<\/li>\n\n\n\n
    2. Check the STATUS\/FAULT indicator on the control panel.<\/li>\n\n\n\n
    3. Check the water level.<\/li>\n\n\n\n
    4. Check the water conductivity.<\/li>\n\n\n\n
    5. Check the water bottle spillage drains.<\/li>\n\n\n\n
    6. Check for leaks.<\/li>\n<\/ol>\n\n\n\n

      Maintenance Kits<\/strong><\/h2>\n\n\n\n

      There are two maintenance kits for the\u00a0PEMPD<\/strong>\u00a0generators, a six-month (4000 hours) and a 24-month (16000 hours).\u00a0 The\u00a0six-month\u00a0kit is Restek part #\u00a022154<\/strong>\u00a0(Parker # MKH2PEMPD-6M), which contains the following:<\/p>\n\n\n\n

        \n
      1. Deionizer cartridge<\/li>\n\n\n\n
      2. 100 \u00b5m water filter<\/li>\n\n\n\n
      3. Two environmental filters<\/li>\n\n\n\n
      4. Filter replacement tool<\/li>\n<\/ol>\n\n\n\n

        The\u00a024-month\u00a0<\/strong>kit is Restek part #\u00a022155<\/strong>\u00a0(Parker # MKH2PEMPD-24M), which contains the following:<\/p>\n\n\n\n

          \n
        1. Deionizer cartridge<\/li>\n\n\n\n
        2. 100 \u00b5m water filter<\/li>\n\n\n\n
        3. Two environmental filters<\/li>\n\n\n\n
        4. Filter replacement tool<\/li>\n\n\n\n
        5. Tube clamp<\/li>\n\n\n\n
        6. Water Pump<\/li>\n\n\n\n
        7. Two fan guards<\/li>\n<\/ol>\n\n\n\n

          Similar kits are available for the\u00a0PEM<\/strong>\u00a0generators.\u00a0 The\u00a0six-month\u00a0kit is Restek part #\u00a023070<\/strong>\u00a0(Parker # MKH2PEM-6M) and contains the following:<\/p>\n\n\n\n

            \n
          1. Deionizer cartridge<\/li>\n\n\n\n
          2. Water filter<\/li>\n\n\n\n
          3. Three environmental filters<\/li>\n<\/ol>\n\n\n\n

            The\u00a024-month\u00a0kits are Restek part #s\u00a023071<\/strong>\u00a0(Parker # MKH2PEM-24M), and
            Restek part # 29289 (Parker # MKH2F-24M), which contain the following:<\/p>\n\n\n\n

              \n
            1. Deionizer cartridge<\/li>\n\n\n\n
            2. Water filter<\/li>\n\n\n\n
            3. Three environmental filters<\/li>\n\n\n\n
            4. Water level sensor (Float)<\/li>\n\n\n\n
            5. Water Pump<\/li>\n\n\n\n
            6. Desiccant cartridge<\/li>\n\n\n\n
            7. Filter replacement tool<\/li>\n\n\n\n
            8. Cartridge spanner (wrench)<\/li>\n\n\n\n
            9. Service reset dongle<\/li>\n\n\n\n
            10. 1\/4\u201d Tygon tube<\/li>\n<\/ol>\n\n\n\n

              Separate part numbers for the\u00a0desiccant cartridge\u00a0and spanner wrench are also available: Restek #\u00a023069<\/strong>\u00a0(Parker # MKH2PEM-D) and # 29287 (Parker # MKH2F-D).\u00a0 A note on page 17 from the Parker H2PEM User Guide provides an important cautionary statement (below).<\/p>\n\n\n\n

              Note: The desiccant cartridge should be changed as and when required; however, it is recommended that it is changed at least every 6, 4, and 2 months on the H2PEM-100\/H2PEM-165; H2PEM-260; and H2PEM-510 respectively.<\/em><\/p>\n\n\n\n

              To summarize, owning a hydrogen generator does require a brief daily inspection and maintenance every six-months (or 4000 hours of use).  For the PEM generators, the desiccant cartridge may need replaced more often depending on the model. <\/p>\n\n\n\n

              I hope you have found this informative.  Keep watching for additional installments of gas generators.  Thank you.<\/p>\n\n\n\n

              <\/div>\n\n\n
              \n

              Products Mentioned<\/h3>\n
              \n
              \n
              \n
              \n Catalog No. 22000 <\/a> <\/div>\n
              \n
              HydroGen Mate DI Water System, Parker, Whatman Model 72-230<\/div>\n <\/div>\n
              \n \u67e5\u770b\u4ea7\u54c1<\/a>\n <\/div>\n <\/div>\n
              \n
              \n Catalog No. 22154 <\/a> <\/div>\n
              \n
              6 Month Maintenance Kit, for Parker H2PEMPD Hydrogen Generators<\/div>\n <\/div>\n
              \n \u67e5\u770b\u4ea7\u54c1<\/a>\n <\/div>\n <\/div>\n
              \n
              \n Catalog No. 22155 <\/a> <\/div>\n
              \n
              24 Month Maintenance Kit, for Parker H2PEMPD Hydrogen Generators<\/div>\n <\/div>\n
              \n \u67e5\u770b\u4ea7\u54c1<\/a>\n <\/div>\n <\/div>\n
              \n
              \n Catalog No. 23070 <\/a> <\/div>\n
              \n
              6 Month Maintenance Kit, for Parker H2PEM Generators<\/div>\n <\/div>\n
              \n \u67e5\u770b\u4ea7\u54c1<\/a>\n <\/div>\n <\/div>\n
              \n
              \n Catalog No. 23071 <\/a> <\/div>\n
              \n
              24 Month Maintenance Kit, for Parker H2PEM Generators<\/div>\n <\/div>\n
              \n \u67e5\u770b\u4ea7\u54c1<\/a>\n <\/div>\n <\/div>\n
              \n
              \n Catalog No. 23069 <\/a> <\/div>\n
              \n
              Replacement Desiccant Cartridge for Parker H2PEM Generators \u00a0<\/div>\n <\/div>\n
              \n \u67e5\u770b\u4ea7\u54c1<\/a>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n ","protected":false},"excerpt":{"rendered":"

              Is your lab or business thinking about purchasing a hydrogen gas generator and would like to know more about the different models available from Restek and the maintenance they will require?  If so, hopefully this post will answer many of your questions\/concerns. But before we get started, have you ever wondered how a hydrogen generator…<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[791],"tags":[],"industries-application":[],"post-badge":[],"resource-type":[567],"product-library":[2444,2462],"resource-technique":[],"hf_cat_post":[623],"ppma_author":[582],"class_list":["post-68015","post","type-post","status-publish","format-standard","hentry","category-blog-fr","resource-type-selection-guides","product-library-produits-pour-la-chromatographie-en-phase-gazeuse","product-library-purification-des-gaz-generateurs"],"acf":[],"taxonomy_info":{"category":[{"value":791,"label":"Blog"}],"resource-type":[{"value":567,"label":"Selection Guides"}],"product-library":[{"value":2444,"label":"Produits pour la chromatographie en phase gazeuse"},{"value":2462,"label":"Purification des gaz et g\u00e9n\u00e9rateurs"}]},"featured_image_src_large":false,"author_info":{"display_name":"Brenda Cogan","author_link":"https:\/\/discover.restek.com\/zh-hans\/author\/brenda-coganrestek-com\/"},"comment_info":0,"category_info":[{"term_id":791,"name":"Blog","slug":"blog-fr","term_group":0,"term_taxonomy_id":791,"taxonomy":"category","description":"","parent":0,"count":442,"filter":"raw","cat_ID":791,"category_count":442,"category_description":"","cat_name":"Blog","category_nicename":"blog-fr","category_parent":0}],"tag_info":false,"authors":[{"term_id":582,"user_id":0,"is_guest":1,"slug":"alan-sensue","display_name":"Alan Sensue","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/posts\/68015","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/comments?post=68015"}],"version-history":[{"count":10,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/posts\/68015\/revisions"}],"predecessor-version":[{"id":73347,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/posts\/68015\/revisions\/73347"}],"wp:attachment":[{"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=68015"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/categories?post=68015"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/tags?post=68015"},{"taxonomy":"industries-application","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/industries-application?post=68015"},{"taxonomy":"post-badge","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/post-badge?post=68015"},{"taxonomy":"resource-type","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/resource-type?post=68015"},{"taxonomy":"product-library","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/product-library?post=68015"},{"taxonomy":"resource-technique","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/resource-technique?post=68015"},{"taxonomy":"hf_cat_post","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/hf_cat_post?post=68015"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/ppma_author?post=68015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}