Specific emission control processes
GEA DeMerc: Removal of mercury
Mercury separation made simple — GEA DeMerc, a reliable mercury removal system in the non-ferrous metal industry
Removal of mercury from process and exhaust gas in the Non-Ferrous metal industry is crucial due to mercury's toxicity, volatility and persistence in the environment.
Mercury removal is a three-stage process.
Gas Cleaning in Non-Ferrous metal industry consists of several process steps. First step in process gas treatment is particle removal by an ESP which includes particle-bound mercury. The second step takes place in the washing and cooling system, typically using calomel to remove large amounts of mercury. However, minimization of clean gas concentrations of mercury is limited by this process. This reduces quality and thus selling price of downstream produced sulfuric acid.
With the new third stage, GEA DeMerc, mercury contained in the gas downstream washing and cooling stage is adsorbed over a fixed bed consisting of new sorbent (GEA MercurySorb), which ensures fine Hg purification and thus improved sulfuric acid quality. Mercury clean gas concentration ≤ 25 µg/m3 can be achieved, regardless of the present mercury species (elemental or ionically bound) The usual abatement rate is ≥ 90 % over the runtime and mercury is finally bound as mercuric sulfide which is significantly less toxic than other mercury compounds.
Advantages of adsorption-based mercury removal
1. High Efficiency:
- Capable of removing >90% of mercury with clean gas concentration ≤ 25 µg/m3
2. Specific abatement:
- No interaction with valuable substance sulfur dioxide (neither adsorption nor conversion to H2S)
3. Operational simplicity:
- Adsorption systems are relatively easy to operate and integrate into existing flue gas treatment setups.
4. Cost-Effectiveness:
- GEA MercurySorb is typically more affordable than activated carbon or noble metals.
5. Scalability and Flexibility:
- Modular design allows for easy scaling and retrofitting in existing plants.
6. Capacity and lifetime:
- GEA DeMerc will be adapted to customer needs and process conditions to have a maximum predictable lifetime.
Want to learn even more?
Webinar: GEA DeMerc
- Follow the path of mercury through zinc and other non-ferrous production cycles, from roasting to gas cleaning and sulfuric acid production.
- See how GEA’s portfolio, from dry and wet gas cleaning to mercury abatement, helps operators meet environmental standards while improving plant efficiency.
- Discover how this innovative fixed-bed adsorption process reduces mercury content even after traditional calomel treatment without the use of toxic or complex materials. Get in touch with real life examples.
Downloads
منتجات ذات صلة
نظام فاصل الهباء الجوي
يتم حقن سائل تنقية غاز كافٍ مباشرةً قبل المخنق الفنتوري من خلال الفوهات الخاصة، ويتم توزيعه بشكل متجانس على امتداد المقطع العرضي كله.
Bubble column reactor
Bubble Columns feature a high liquid to gas volume ratio, beneficial when conducting rather slow reactions in the liquid phase as large reaction volumes can be realized. Ideal when dry spots must be avoided in the contactor.
Converter gas recovery (LT process)
The conversion of hot metal into steel produces CO-laden gases of high caloric value. The recovery of these gases means to save a considerable amount of energy. The LT-Steel Gas Process has established worldwide.
جهاز امتصاص المرسبات الكهروستاتيكية من GEA
يتمثل أحد أهم أنشطتنا في صناعة المصفيات في عملية التنظيف الغازية لوحدات التكسير الحفزي للسوائل. تجمع تقنيات GEA بين العمليات الهندسية، والجوانب البيئية، وتوفير الطاقة. وبناءً على ذلك، تقدم GEA حلول التنظيف الهوائية مع الحفاظ على معدلات منخفضة من النفقات الرأسمالية والنفقات التشغيلية.
رؤى GEA
GEA reports profitable growth for 2025 and expects accelerated revenue growth
GEA’s past fiscal year was one of significant growth and further profitability gains. In particular, the technology group substantially increased order intake, with all divisions contributing here. GEA also made progress in all Mission 30 strategic growth areas. In addition, GEA met key interim targets under its climate plan ahead of schedule. Major milestones in fiscal year 2025 were admission to the DAX index, the award of one of the largest contracts in the company’s history, and streamlining of the corporate structure.
How SmartParc is rewriting the rules of food production
Thanks to a new SmartParc manufacturing site, food processors in the U.K. are cutting their running costs and emissions. With GEA heating and cooling technology at its core, this collaborative production model demonstrates how innovation is accelerating the industry’s net-zero ambitions.
مركز اختبار علوم الأغذية
"تخمير البيض مثل تخمير الجعة." هذا نوع المقارنات التي تجعلك تبتسم - ومن ثم تضيء الفكرة في عقلك: شيء معقد يبدو بسيطاً فجأة. خلال هذا الفيلم الشخصي، الذي تدور أحداثه في قلب الأراضي الزراعية في الولايات المتحدة، نستكشف التخمير الدقيق والعمل الواقعي الذي يتطلبه تحويل الفكرة إلى الأغذية.
