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Sodium Bicarbonate for Flue Gas Treatment (Dry Sorbent Injection)

Sodium bicarbonate is used in dry sorbent injection (DSI) to remove acid gases such as sulfur dioxide (SO₂), hydrogen chloride (HCl) and hydrogen fluoride (HF) from industrial flue gas. The powder is injected into the hot gas duct, reacts with the acid gases, and is collected as a dry residue in the bag filter or electrostatic precipitator.

Pars Baking Soda Group supplies industrial grade sodium bicarbonate from its plants in Mashhad and Shiraz to waste incinerators, industrial plants and flue gas treatment companies. It is available in 25 kg bags and jumbo bags for bulk export to Russia, Central Asia, and neighboring markets.

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How Dry Sorbent Injection with Sodium Bicarbonate Works

DSI is a simple, dry flue gas cleaning method. It needs no slurry, no water treatment and relatively little equipment.

Milling and Injection

Sodium bicarbonate is usually milled to a fine powder, often on site, and pneumatically injected into the flue gas duct ahead of the filter.

Thermal Activation

In the hot gas, sodium bicarbonate decomposes into highly porous sodium carbonate. This large reactive surface is what makes it so effective against acid gases.

Acid Gas Neutralization

The activated sorbent reacts with SO₂, SO₃, HCl and HF in the gas stream, forming stable sodium salts such as sodium sulfate, sodium chloride and sodium fluoride.

Dry Residue Collection

The reaction products and unreacted sorbent are captured in the bag filter or electrostatic precipitator and removed as a dry solid.

The Chemistry of Sodium Bicarbonate DSI

Activation: 2NaHCO₃ → Na₂CO₃ + CO₂ + H₂O

Hydrogen chloride removal: NaHCO₃ + HCl → NaCl + CO₂ + H₂O

Sulfur dioxide removal: Na₂CO₃ + SO₂ + ½O₂ → Na₂SO₄ + CO₂

Hydrogen fluoride removal: NaHCO₃ + HF → NaF + CO₂ + H₂O

Design note: The right injection rate, particle size and injection point depend on the gas temperature, acid gas concentrations, residence time and emission limits. They should be set by the flue gas treatment system designer, usually after trial injection.

Sodium Bicarbonate vs. Hydrated Lime for Flue Gas Treatment

Both are common dry sorbents. Sodium bicarbonate is chosen when high reactivity and a wide temperature window matter most.

	Sodium bicarbonate (NaHCO₃)	Hydrated lime (Ca(OH)₂)
Reactivity with acid gases	Very high after thermal activation	Lower; often needs humidification
Operating temperature	Works well at typical bag filter temperatures and above	Most effective at lower temperatures
Sorbent consumption	Close to the theoretical (stoichiometric) amount	Usually a larger excess is needed
Residue	Smaller amount of dry sodium salts	Larger amount of calcium residue
Typical choice when	Strict emission limits, high HCl or SO₂ peaks	Lower sorbent cost is the priority

Industries That Use Sodium Bicarbonate for Emission Control

Waste-to-energy and municipal waste incinerators

Hospital and hazardous waste incinerators

Biomass and coal-fired boilers

Glass furnaces

Ceramics and brick kilns

Metal processing and smelting

Chemical plants

Sodium Bicarbonate Supply for Flue Gas Treatment

A direct Iranian manufacturer supplying industrial plants and flue gas treatment companies.

Direct ManufacturerTwo production plants in Mashhad and Shiraz, with no traders in between.

Large CapacityA combined monthly capacity of over 24,000 tons for continuous DSI consumption.

Bulk Packaging25 kg bags and jumbo bags (big bags) for silos and on-site milling systems.

Specifications on RequestSpecifications and a COA for our industrial grade sodium bicarbonate are available on request.

Export Markets

We welcome inquiries from industrial plants and flue gas treatment companies in:

Russia

Belarus

Kazakhstan

Uzbekistan

Turkmenistan

Kyrgyzstan

Tajikistan

Armenia

Azerbaijan

Iraq

Afghanistan

Pakistan

Turkey

UAE

Industrial Grade Sodium Bicarbonate Air Pollution Control Guide Sodium Bicarbonate in the Petrochemical Industry

Frequently Asked Questions

How is sodium bicarbonate used in flue gas treatment?

Fine sodium bicarbonate powder is injected into the hot flue gas, where it activates and reacts with acid gases such as SO₂, HCl and HF. The dry reaction products are collected in the bag filter or electrostatic precipitator.

What is dry sorbent injection (DSI)?

DSI is a flue gas cleaning method in which a dry powder sorbent, such as sodium bicarbonate or hydrated lime, is injected directly into the gas duct to neutralize acid gases before the filter.

Is sodium bicarbonate better than lime for desulfurization?

Sodium bicarbonate is more reactive, works over a wider temperature range and usually needs less excess sorbent. Hydrated lime has a lower purchase price. The best choice depends on emission limits, gas temperature and total operating cost.

Why is sodium bicarbonate milled before injection?

A finer particle size gives a larger reactive surface area, which improves acid gas removal and reduces sorbent consumption. Many plants mill sodium bicarbonate on site just before injection.

Do you supply sodium bicarbonate for flue gas treatment?

Yes. Pars Baking Soda Group supplies industrial grade sodium bicarbonate in 25 kg bags and jumbo bags, and welcomes inquiries from industrial plants and flue gas treatment companies in Russia, Central Asia and neighboring countries.

Need Sodium Bicarbonate for Flue Gas Treatment?

Tell us your expected monthly consumption, packaging and destination country. Contact Pars Baking Soda Group for specifications, a COA, bulk pricing and export supply.