{"id":3502,"date":"2025-10-24T06:52:10","date_gmt":"2025-10-24T06:52:10","guid":{"rendered":"https:\/\/nalonminerals.com\/?p=3502"},"modified":"2025-11-05T07:53:01","modified_gmt":"2025-11-05T07:53:01","slug":"hydroxides-of-iron-in-the-desulphurisation-of-biogas-advantages-over-other-captors-of-h2s","status":"publish","type":"post","link":"https:\/\/nalonminerals.com\/en\/hydroxides-of-iron-in-the-desulphurisation-of-biogas-advantages-over-other-captors-of-h2s\/","title":{"rendered":"Hydroxides of iron in the desulphurisation of biogas: advantages over other captors of H\u2082S"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Biogas is a renewable energy source with great potential. However, it contains hydrogen sulphide (H\u2082S), a toxic and corrosive gas that limits its use. Iron hydroxides are the safest and most effective solution for its removal. At Nalon Minerals, we offer N-Bio, a medium designed to maximise process efficiency and simplify operations in biogas plants.   <\/p>\n\n<div class=\"wp-block-aioseo-table-of-contents\"><ul><li><a href=\"#aioseo-como-actuan-los-hidroxidos-de-hierro-en-biogas\">How do iron hydroxides act in biogas<\/a><\/li><li><a href=\"#aioseo-ventajas-de-los-hidroxidos-de-hierro-frente-a-otros-metodos\">Advantages of iron hydroxides over other methods<\/a><ul><li><a href=\"#aioseo-1-alta-eficiencia-en-diferentes-condiciones\">1. High efficiency under different conditions<\/a><\/li><li><a href=\"#aioseo-2-seguridad-operativa-garantizada\">2. Guaranteed operational safety<\/a><\/li><li><a href=\"#aioseo-3-facil-integracion-en-las-instalaciones\">3. Easy integration into existing facilities<\/a><\/li><li><a href=\"#aioseo-4-mantenimiento-sencillo-y-predecible\">4. Simple and predictable maintenance<\/a><\/li><li><a href=\"#aioseo-5-valor-anadido-en-el-digestato\">5. Added value in digestate<\/a><\/li><\/ul><\/li><li><a href=\"#aioseo-limitaciones-y-como-gestionarlas\">Limitations and how to manage them<\/a><\/li><li><a href=\"#aioseo-comparativa-con-otros-captadores-de-h%E2%82%82s\">Comparison with other H\u2082S collectors<\/a><\/li><li><a href=\"#aioseo-conclusion-una-solucion-eficaz-y-segura\">Conclusion: an effective and safe solution<\/a><\/li><li><a href=\"#aioseo-preguntas-frecuentes-acerca-de-los-hidroxidos-de-hierro\">Frequently asked questions about iron hydroxides<\/a><ul><li><a href=\"#aioseo-es-seguro-usar-hidroxido-de-hierro-en-biogas\">Is it safe to use iron hydroxide in biogas?<\/a><\/li><li><a href=\"#aioseo-puede-regenerarse-el-medio-de-hidroxido-de-hierro\">Can iron hydroxide media be regenerated?<\/a><\/li><li><a href=\"#aioseo-que-coste-tiene-el-hidroxido-de-hierro-frente-a-la-inyeccion-de-oxigeno\">What is the cost of iron hydroxide compared to oxygen injection?<\/a><\/li><\/ul><\/li><\/ul><\/div>\n<figure class=\"wp-block-post-featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"1515\" src=\"https:\/\/nalonminerals.com\/wp-content\/uploads\/2025\/09\/planta-de-biogas-para-la-generacion-de-energia-scaled.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Planta de biog\u00e1s en entorno rural equipada para la desulfuraci\u00f3n de biog\u00e1s y eliminaci\u00f3n de H\u2082S con hidr\u00f3xidos de hierro.\" style=\"object-fit:cover;\" srcset=\"https:\/\/nalonminerals.com\/wp-content\/uploads\/2025\/09\/planta-de-biogas-para-la-generacion-de-energia-scaled.jpg 2560w, https:\/\/nalonminerals.com\/wp-content\/uploads\/2025\/09\/planta-de-biogas-para-la-generacion-de-energia-1280x758.jpg 1280w, https:\/\/nalonminerals.com\/wp-content\/uploads\/2025\/09\/planta-de-biogas-para-la-generacion-de-energia-980x580.jpg 980w, https:\/\/nalonminerals.com\/wp-content\/uploads\/2025\/09\/planta-de-biogas-para-la-generacion-de-energia-480x284.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 2560px, 100vw\" \/><\/figure>\n<h2 class=\"wp-block-heading\" id=\"aioseo-como-actuan-los-hidroxidos-de-hierro-en-biogas\">How do iron hydroxides act in biogas<\/h2>\n\n<p class=\"wp-block-paragraph\">Iron hydroxides react directly with H\u2082S. They transform it into iron sulphide (FeS), a solid compound that separates from the gas. This chemical reaction is simple, does not require the addition of oxygen, and works under normal operating conditions.  <\/p>\n\n<p class=\"wp-block-paragraph\">In specialised products, such as formulations designed for the biogas sector, the medium can be partially regenerated by means of controlled aeration. This extends its useful life and optimises costs. <\/p>\n\n<h2 class=\"wp-block-heading\" id=\"aioseo-ventajas-de-los-hidroxidos-de-hierro-frente-a-otros-metodos\">Advantages of iron hydroxides over other methods<\/h2>\n\n<h3 class=\"wp-block-heading\" id=\"aioseo-1-alta-eficiencia-en-diferentes-condiciones\">1. High efficiency under different conditions<\/h3>\n\n<p class=\"wp-block-paragraph\">They remove H\u2082S stably even with varying concentrations. This flexibility makes them ideal for plants with fluctuating loads. <\/p>\n\n<h3 class=\"wp-block-heading\" id=\"aioseo-2-seguridad-operativa-garantizada\">2. Guaranteed operational safety<\/h3>\n\n<p class=\"wp-block-paragraph\">No oxygen is introduced into the gas line, reducing ATEX risks and preventing explosive scenarios.<\/p>\n\n<h3 class=\"wp-block-heading\" id=\"aioseo-3-facil-integracion-en-las-instalaciones\">3. Easy integration into existing facilities<\/h3>\n\n<p class=\"wp-block-paragraph\">They can be dosed in situ in the digester or applied in external beds. They do not require complex modifications or additional equipment involving significant investment. <\/p>\n\n<h3 class=\"wp-block-heading\" id=\"aioseo-4-mantenimiento-sencillo-y-predecible\">4. Simple and predictable maintenance<\/h3>\n\n<p class=\"wp-block-paragraph\">Monitoring is limited to checking H\u2082S output and media pressure drop. This allows replacement to be planned in advance. <\/p>\n\n<h3 class=\"wp-block-heading\" id=\"aioseo-5-valor-anadido-en-el-digestato\">5. Added value in digestate<\/h3>\n\n<p class=\"wp-block-paragraph\">The iron and sulphur present in the by-products are incorporated into the digestate. This can increase its agronomic value as a fertiliser. <\/p>\n\n<h2 class=\"wp-block-heading\" id=\"aioseo-limitaciones-y-como-gestionarlas\">Limitations and how to manage them<\/h2>\n\n<p class=\"wp-block-paragraph\">Although iron hydroxides are effective, they also present challenges. The medium becomes saturated over time, so it is necessary to monitor the quality of the biogas and plan for replacement. Partial regeneration is feasible in some products, although it depends on the H\u2082S load. The iron sulphide generated must be managed in accordance with local regulations.   <\/p>\n\n<h2 class=\"wp-block-heading\" id=\"aioseo-comparativa-con-otros-captadores-de-h&#x2082;s\">Comparison with other H\u2082S collectors<\/h2>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Method<\/td><td>Advantages<\/td><td>Inconvenients<\/td><td>Suitability<br\/><\/td><\/tr><tr><td>Injection of oxygen \/ air<\/td><td>&#8211; Reactive inexpensive and available. &#8211; Initial implementation is simple. &#8211; Reduces H\u2082S through oxidation.<\/td><td>&#8211; ATEX risk due to O\u2082\u2013CH\u2084 mixture. &#8211; Requires sensors and continuous monitoring. &#8211; May affect methanogenesis in the digester. &#8211; Generates sulphur deposits.<\/td><td>Plants with very stable flows and a high technical level.<\/td><\/tr><tr><td>Activated carbon<\/td><td>&#8211; High adsorption capacity under optimal conditions. &#8211; Well-known and widely used technology.<\/td><td>&#8211; High cost due to frequent replacement. &#8211; Waste treated as hazardous. &#8211; Lower efficiency with flow variations or H\u2082S. &#8211; Sensitive to humidity and temperature.<\/td><td>Facilities with low-medium loads and high OPEX budget.<\/td><\/tr><tr><td>Iron hydroxides (N-Bio)<\/td><td>&#8211; Consistent efficiency even with fluctuations. &#8211; No oxygen in gas \u2192 maximum safety. &#8211; Predictable and competitive OPEX. &#8211; Easy integration (on-site dosing or external beds). &#8211; By-products enrich the digestate.<\/td><td>&#8211; Medium becomes saturated over time. &#8211; Requires replacement or partial regeneration planning. &#8211; FeS management in accordance with regulations.<\/td><td>Small, medium and large plants seeking security, simplicity and sustainability.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\" id=\"aioseo-conclusion-una-solucion-eficaz-y-segura\">Conclusion: an effective and safe solution<\/h2>\n\n<p class=\"wp-block-paragraph\">Desulphurisation with iron hydroxides is a solid alternative to other H\u2082S scrubbers. It offers high efficiency, operational safety and low maintenance. It also provides additional benefits such as digestate recovery. It is therefore establishing itself as the preferred option for biogas plants seeking profitability and sustainability.   <\/p>\n\n<h2 class=\"wp-block-heading\" id=\"aioseo-preguntas-frecuentes-acerca-de-los-hidroxidos-de-hierro\">Frequently asked questions about iron hydroxides<\/h2>\n\n<h3 class=\"wp-block-heading\" id=\"aioseo-es-seguro-usar-hidroxido-de-hierro-en-biogas\">Is it safe to use iron hydroxide in biogas?<\/h3>\n\n<p class=\"wp-block-paragraph\">Yes. Iron hydroxides remove H\u2082S without introducing oxygen into the gas line, avoiding ATEX risks and simplifying plant operation. <\/p>\n\n<h3 class=\"wp-block-heading\" id=\"aioseo-puede-regenerarse-el-medio-de-hidroxido-de-hierro\">Can iron hydroxide media be regenerated?<\/h3>\n\n<p class=\"wp-block-paragraph\">In certain formulations, such as N-Bio, the medium can be partially regenerated with controlled aeration. Viability depends on the H\u2082S load and operating conditions. <\/p>\n\n<h3 class=\"wp-block-heading\" id=\"aioseo-que-coste-tiene-el-hidroxido-de-hierro-frente-a-la-inyeccion-de-oxigeno\">What is the cost of iron hydroxide compared to oxygen injection?<\/h3>\n\n<p class=\"wp-block-paragraph\">CAPEX for iron hydroxides is usually lower and OPEX more stable (planned replacement). Oxygen injection requires less expenditure on reagents, but involves high costs for sensors, monitoring and safety. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Biogas is a renewable energy source with great potential. However, it contains hydrogen sulphide (H\u2082S), a toxic and corrosive gas that limits its use. Iron hydroxides are the safest and most effective solution for its removal. At Nalon Minerals, we offer N-Bio, a medium designed to maximise process efficiency and simplify operations in biogas plants.   <\/p>\n","protected":false},"author":1,"featured_media":3482,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"off","_et_pb_old_content":"","_et_gb_content_width":"","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[152],"tags":[],"class_list":["post-3502","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hydroxides of iron in the desulphurisation of biogas: advantages over other captors of H\u2082S - Nal\u00f3n Minerals<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nalonminerals.com\/en\/hydroxides-of-iron-in-the-desulphurisation-of-biogas-advantages-over-other-captors-of-h2s\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hydroxides of iron in the desulphurisation of biogas: advantages over other captors of H\u2082S - Nal\u00f3n Minerals\" \/>\n<meta property=\"og:description\" content=\"Biogas is a renewable energy source with great potential. 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However, it contains hydrogen sulphide (H\u2082S), a toxic and corrosive gas that limits its use. Iron hydroxides are the safest and most effective solution for its removal. 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