{"id":375,"date":"2017-03-02T11:30:23","date_gmt":"2017-03-02T17:30:23","guid":{"rendered":"http:\/\/rccostello.com\/wordpress\/?p=375"},"modified":"2026-05-08T03:33:51","modified_gmt":"2026-05-08T10:33:51","slug":"methanol-contamination-amine-system","status":"publish","type":"post","link":"https:\/\/www.rccostello.com\/wordpress\/modular-plants\/methanol-contamination-amine-system\/","title":{"rendered":"Do You Have Methanol Contamination In Your Amine System?"},"content":{"rendered":"<figure id=\"attachment_395\" aria-describedby=\"caption-attachment-395\" style=\"width: 560px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/rccostello.com\/wordpress\/wp-content\/uploads\/2017\/02\/Gas-plant-Cropped.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-395\" title=\"Amine Unit with Methanol Contamination\" src=\"http:\/\/rccostello.com\/wordpress\/wp-content\/uploads\/2017\/02\/Gas-plant-Cropped-300x215.jpg\" alt=\"Amine Unit with Methanol Contamination in the Diethanolamine\" width=\"560\" height=\"401\" srcset=\"https:\/\/www.rccostello.com\/wordpress\/wp-content\/uploads\/2017\/02\/Gas-plant-Cropped-300x215.jpg 300w, https:\/\/www.rccostello.com\/wordpress\/wp-content\/uploads\/2017\/02\/Gas-plant-Cropped-768x551.jpg 768w, https:\/\/www.rccostello.com\/wordpress\/wp-content\/uploads\/2017\/02\/Gas-plant-Cropped-1024x735.jpg 1024w, https:\/\/www.rccostello.com\/wordpress\/wp-content\/uploads\/2017\/02\/Gas-plant-Cropped.jpg 2048w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/a><figcaption id=\"caption-attachment-395\" class=\"wp-caption-text\">Amine Unit with Methanol Contamination<\/figcaption><\/figure>\n<p>Methanol contamination in your amine system can lead to performance problems in your amine system as it builds up.<\/p>\n<p>Methanol is commonly injected down hole in natural gas wells to prevent the formation of methane clathrates (hydrates) in natural gas wells.<\/p>\n<p><strong>Hydrates<\/strong><\/p>\n<p>Methane clathrates (hydrates) typically form during natural gas production. As liquid water condenses in the presence of methane at high pressure hydrates can form. Larger hydrocarbon molecules such ethane (C<sub>2<\/sub>H<sub>6<\/sub>) and propane (C<sub>3<\/sub>H<sub>8<\/sub>) can also form hydrates. \u00a0Even larger molecules such as butanes (C<sub>4<\/sub>H<sub>10<\/sub>) and pentanes (C<sub>5<\/sub>H<sub>12<\/sub>) cannot fit into the water cage structure that encapsulates the hydrocarbon molecule and tend to destabilize the formation of hydrates. Trace impurities in hydrates include carbon dioxide (CO<sub>2<\/sub>), nitrogen (N<sub>2<\/sub>), and hydrogen sulfide (H<sub>2<\/sub>S).<\/p>\n<figure id=\"attachment_382\" aria-describedby=\"caption-attachment-382\" style=\"width: 279px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/rccostello.com\/wordpress\/wp-content\/uploads\/2017\/02\/Methane-Hydrate.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-382\" src=\"http:\/\/rccostello.com\/wordpress\/wp-content\/uploads\/2017\/02\/Methane-Hydrate.png\" alt=\"Hydrates consist methane trapped in a crystalline water structure\" width=\"279\" height=\"244\" \/><\/a><figcaption id=\"caption-attachment-382\" class=\"wp-caption-text\">Molecule of a Methane Hydrate<\/figcaption><\/figure>\n<p><b>Production Downtime<\/b><\/p>\n<p>Hydrates can block pipelines and processing equipment. They are typically removed by reducing the pressure, heating them, or dissolving them a chemical agent such as <a href=\"https:\/\/en.wikipedia.org\/wiki\/Methanol\">methanol<\/a> or <a href=\"https:\/\/en.wikipedia.org\/wiki\/Ethylene_glycol\">ethylene glycol<\/a>.<\/p>\n<p>In some cases a hydrate can completely plug a choke on the inlet to a gas fired heater at the well head. The piping must be depressurized on both sides of the heater, the choke dissembled and the hydrate removed from the choke and piping. This can result in a\u00a0extensive downtime.<\/p>\n<p><strong>Prevent the Formation of Hydrates<\/strong><\/p>\n<p>It is generally preferable to prevent hydrates from forming\u00a0and plugging equipment. This can be accomplished by removing water, or by the addition of <a href=\"https:\/\/en.wikipedia.org\/wiki\/Ethylene_glycol\">ethylene glycol<\/a> or\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Methanol\">methanol<\/a>, which act to depress the temperature at which hydrates will form (like <a href=\"https:\/\/en.wikipedia.org\/wiki\/Antifreeze\">antifreeze<\/a>).\u00a0Recently other\u00a0forms of hydrate inhibitors have been developed,\u00a0such as\u00a0Kinetic Hydrate inhibitors.\u00a0\u00a0Polyvinylcaprolactam<span class=\"Apple-converted-space\">\u00a0is one type of kinetic hydrate inhibitor <\/span>which slows the rate of hydrate formation. Anti-agglomerates are another type which do not prevent hydrates from forming, but do prevent them sticking together\u00a0so that equipment does not plug.<\/p>\n<p><strong>Methanol Distillation<\/strong><\/p>\n<p>The injected methanol can ultimately end up in your your knock out water, or worse, in your amine unit where carbon dioxide and\/or hydrogen sulfide are removed from the natural gas.<\/p>\n<p>Long term the methanol circulates in the amine unit and slowly concentrates up to percentage levels which can lead to operating problems.<\/p>\n<p>It can be removed when the distillate receiver on the amine unit is coupled to a modular methanol\/ water continuous distillation unit.\u00a0 The methanol is recovered and can be sent back to the well head for reuse. The water can sent back to the amine unit for water makeup, thus creating a closed loop for both methanol and water.<\/p>\n<p>The separation from methanol and water is a fairly simple binary <a href=\"http:\/\/rccostello.com\/distillation.html\">distillation<\/a> because there are no azeotropes.<\/p>\n<p>COSTELLO can design a <a href=\"http:\/\/rccostello.com\/skid_mounted_plant.html\">modular<\/a> methanol recovery unit that can be coupled to your amine unit.<\/p>\n<p>References:<\/p>\n<p>Behavior and Effect of Methanol in Amine Treating Systems, \u00a0by Ralph Weiland ,\u00a0Anand Govindarajan , Albrecht Goethe and Rich Ackman<\/p>\n<p><a href=\"http:\/\/rccostello.com\/distil\/distil0.htm\">Distillation an Introduction<\/a>, by Ming T. Tham<\/p>\n<p><strong>Phone: 310-792-5870 Email: rcca@rccostello.com<\/strong><\/p>\n<p><strong>Website: <a href=\"http:\/\/rccostello.com\/\">rccostello.com<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Methanol contamination in your amine system can lead to performance problems in your amine system as it builds up. Methanol is commonly injected down hole in natural gas wells to prevent the formation of methane clathrates (hydrates) in natural gas wells. Hydrates Methane clathrates (hydrates) typically form during natural gas production. As liquid water condenses [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[1,9],"tags":[67,68,66,69],"class_list":["post-375","post","type-post","status-publish","format-standard","category-modular-plants","category-natural-gas","tag-hydrates","tag-methane-clathrates","tag-methanol-contamination-in-amines","tag-modular-distillation","entry","has-post-thumbnail"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Remove Methanol from Your Amine System with Distillation<\/title>\n<meta name=\"description\" content=\"Methanol contamination can reduce amine system performance, increase corrosion risks, and impact gas treatment efficiency.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rccostello.com\/wordpress\/modular-plants\/methanol-contamination-amine-system\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Remove Methanol from Your Amine System with Distillation\" \/>\n<meta property=\"og:description\" content=\"Methanol contamination can reduce amine system performance, increase corrosion risks, and impact gas treatment efficiency.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.rccostello.com\/wordpress\/modular-plants\/methanol-contamination-amine-system\/\" \/>\n<meta property=\"og:site_name\" content=\"COSTELLO\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/RC-Costello-Assoc-Inc-168604736508331\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/COSTELLO.ENGINEERING.SERVICES\/\" \/>\n<meta property=\"article:published_time\" content=\"2017-03-02T17:30:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-08T10:33:51+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/rccostello.com\/wordpress\/wp-content\/uploads\/2017\/02\/Gas-plant-Cropped-300x215.jpg\" \/>\n<meta name=\"author\" content=\"R.C. 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