Zinc Oxide Desulfurizer Replacement: Which Grade Fits Your Gas Purification System?
If your zinc oxide desulfurizer is reaching breakthrough too quickly, outlet H₂S is increasing, or you are looking for an alternative to your current supplier, the replacement should not be selected by ZnO content alone.
Operating temperature, sulfur capacity, gas composition, pressure and the existing bed all matter.
HONREL supplies three zinc oxide desulfurizer grades for industrial gas purification: HY310-C for low- and normal-temperature service, T305 for standard high-temperature service, and HY306-G for high-temperature applications requiring higher sulfur capacity.
If you already use a zinc oxide desulfurizer, send HONREL your current product specification and operating conditions. We can compare the existing material with these grades and normally respond within 30 minutes with a recommended product and quotation.
Оглавление
When Should You Consider Replacing Your Current ZnO Desulfurizer?
A fixed bed does not need replacement simply because it has been operating for a certain number of months.
The more useful indicator is breakthrough.
If the outlet H₂S begins rising toward the maximum allowed by the downstream process, the remaining effective sulfur capacity of the bed needs attention.
Replacement may also be worth reviewing when:
the service cycle is becoming shorter, the current product cannot reach the required outlet H₂S, the operating temperature has changed, or the current material no longer provides acceptable sulfur capacity.
For plants changing suppliers, the objective should be to match or improve the existing duty without creating unnecessary changes to the desulfurization vessel.
HY310-C, T305 or HY306-G?
The first selection point is operating temperature.
| HONREL Grade | Температура | ZnO / Active Components | Прорыв в области производства серы. | Outlet H₂S |
|---|---|---|---|---|
| HY310-C | 0–150°C | ≥90% | ≥10 wt% at 30°C | <0.1 ppm |
| Т305 | 150–400 °C | ZnO ≥95% | ≥20 wt% | <0.1 ppm |
| HY306-G | 150–450 °C | ≥95% | ≥20 wt% at 220°C; ≥30 wt% at 350°C | <0.1 ppm |
These grades are not interchangeable simply because all three are based on zinc oxide.
HY310-C for Low- and Normal-Temperature Gas Purification
Use HY310-C as the starting point when the desulfurization bed operates below 150°C.
HONREL specifies a breakthrough sulfur capacity of ≥10 wt% at 30°C, ZnO and active components of ≥90%, and an outlet H₂S specification below 0.1 ppm under the stated process conditions.
This grade is intended for normal- and low-temperature fine desulfurization where conventional high-temperature ZnO materials may not match the actual operating condition.
T305 for Standard High-Temperature Service
T305 covers 150–400 °C and contains ≥95% ZnO.
Its specified breakthrough sulfur capacity is ≥20 wt%, with a suitable operating temperature of 300–400°C.
For an existing high-temperature ZnO bed with conventional operating requirements, T305 is the standard grade to compare against the material currently loaded.
HY306-G for Higher Sulfur Capacity
HY306-G operates across 150–450 °C.
HONREL specifies ZnO and active components of ≥95%, with breakthrough sulfur capacity of ≥20 wt% at 220°C и ≥30 wt% at 350°C.
For high-temperature units where sulfur loading and replacement interval are important, HY306-G provides the highest specified sulfur capacity of the three HONREL grades.
High ZnO Content Does Not Automatically Mean Longer Bed Life
This is an important point when comparing replacement products.
Two desulfurizers can both contain approximately 95% ZnO and still have different usable sulfur capacities under actual operating conditions.
HONREL T305 contains ≥95% ZnO with specified breakthrough sulfur capacity ≥20 wt%.
HY306-G contains ≥95% ZnO and active components, but its specified breakthrough sulfur capacity reaches ≥30 wt% at 350°C.
So when comparing your current desulfurizer with a replacement, do not stop at: “How much ZnO does it contain?”
Also ask: “What sulfur capacity does it provide at my operating temperature?”
That number has a much more direct relationship with how much sulfur the bed can hold before breakthrough.
Why Is Your Current ZnO Bed Breaking Through Too Early?
The desulfurizer itself is only one possibility.
Higher inlet H₂S increases the sulfur load entering the bed. Higher gas flow increases the amount of sulfur the bed must process over time. Temperature outside the suitable range can also change performance.
Before replacing the material, compare the current operation with the original design condition.
For example, a unit that was designed around relatively low inlet H₂S may experience a much shorter service cycle after feed composition changes, even if the same desulfurizer is still being used.
This does not necessarily mean the material is defective.
It may mean the current grade no longer matches the actual sulfur duty.
HONREL can review the inlet H₂S, gas flow and operating temperature together with the current product specification before recommending a replacement.
Protecting Downstream Catalysts Requires Deep H₂S Removal
ZnO desulfurization is often the final purification step before a sulfur-sensitive downstream catalyst.
HONREL specifies outlet H₂S <0.1 ppm for HY310-C, T305 and HY306-G under their stated process conditions.
This makes product selection particularly important in applications such as hydrogen production, synthetic ammonia, syngas processing, petroleum refining and other processes where residual sulfur can affect downstream catalysts.
The cheapest replacement material is not useful if sulfur breakthrough occurs earlier or the required outlet concentration cannot be maintained.
For these applications, compare outlet requirement + sulfur capacity + operating temperature before comparing price.
Can HONREL Replace the ZnO Desulfurizer You Currently Use?
In many cases, the quickest starting point is the product you already have.
Send HONREL the current desulfurizer datasheet or specification.
We can compare:
| Existing Product Data | HONREL Comparison |
|---|---|
| Рабочая температура | HY310-C / T305 / HY306-G range |
| ZnO content | ZnO and active-component specification |
| Sulfur capacity | HONREL breakthrough sulfur capacity |
| Размер частиц | Available HONREL dimensions |
| Объемная плотность | Bed loading comparison |
| Mechanical strength | HONREL compressive-strength specification |
| Required outlet H₂S | HONREL stated outlet performance |
HONREL’s current products have densities around 1.0 kg/L, with available extrudate dimensions depending on grade.
This information is particularly useful when replacing material in an existing fixed-bed vessel because the available bed volume is already defined.
Tell Us What Problem You Are Trying to Solve
You do not need to know the HONREL model before contacting us.
If the current product is working but you need another supplier, send us the existing TDS.
If breakthrough is occurring too early, send the current TDS plus operating data.
If this is a new gas purification unit, send the basic process requirement.
The most useful information is:
Gas type
Natural gas, syngas, hydrogen, ammonia feed gas, refinery gas or another process stream.
Рабочая температура и давление
Gas flow
Вход H₂S
Required outlet H₂S
Current bed volume or required quantity
Current desulfurizer specification, if this is a replacement.
HONREL can use this information to determine whether HY310-C, T305 or HY306-G is the appropriate starting point.
Get a Replacement Recommendation and Price in 30 Minutes
If you are already purchasing zinc oxide desulfurizer, there is no need to start from a generic product catalogue.
Send HONREL your current TDS.
We will compare the operating temperature, sulfur capacity, ZnO content, physical properties and gas purification requirement with our available grades.
If you do not have the TDS, send your operating conditions instead.
HONREL normally responds to enquiries within 30 minutes with a recommended grade and quotation.
For international orders, also provide your required quantity and destination port so we can calculate the corresponding supply and shipping basis.
View the complete HONREL Zinc Oxide Desulfurizer specifications или contact HONREL for a replacement quotation.
Часто задаваемые вопросы
Which HONREL zinc oxide desulfurizer should replace my current product?
For 0–150°C service, start by comparing your product with HY310-C. For 150–400°C conventional high-temperature service, compare T305. For high-temperature operation requiring higher specified sulfur capacity, evaluate HY306-G.
Can I replace another manufacturer’s ZnO desulfurizer with HONREL?
Send HONREL the existing product datasheet and operating conditions. We can compare its key specifications with HY310-C, T305 and HY306-G before recommending a replacement.
Which HONREL grade has the highest sulfur capacity?
HY306-G has the highest stated breakthrough sulfur capacity, reaching ≥30 wt% at 350°C under the specified test condition.
What if my ZnO desulfurizer is breaking through too quickly?
Check whether inlet H₂S, gas flow or operating temperature has changed. If the current sulfur load is higher than the original design condition, a different grade or loading requirement may be necessary.
Can HONREL quote without knowing the exact model I need?
Yes. Send the gas type, operating temperature, pressure, flow, inlet H₂S, required outlet H₂S and required quantity. HONREL can use these conditions to identify the appropriate grade before quoting.
How quickly can HONREL provide a replacement quotation?
HONREL normally responds to enquiries within 30 minutes. For an existing unit, sending the current product TDS with your enquiry makes the comparison faster.
