Bioethanol - Energy efficient purification of bioethanol

Sulzer’s bioethanol purification technologies combine advanced distillation, efficient dehydration, and process electrification to deliver high-purity bioethanol with minimal energy use. From 1G to advanced 4G bioethanol, our solutions support fuel, chemical, and industrial grades with low OPEX, high yield, and scalable skid-mounted systems. Benefit from proven designs, process guarantees, and thousands of references worldwide.

Operating in today’s bioethanol sector means addressing multiple, interconnected challenges:

Energy efficiency

Minimize steam consumption and reduce utility costs with advanced heat integration and process electrification.

Sustainability & compliance

Support low-carbon bioethanol production and meet environmental regulations with optimized purification technologies.

High purity & versatility

Achieve fuel, pharma, and industrial-grade bioethanol with tailored distillation and dehydration solutions.

Reliable & scalable operations

Benefit from proven designs, skid-mounted systems, and process guarantees for both greenfield and brownfield projects.

Sulzer’s approach to bioethanol purification is built on decades of process engineering expertise and a deep understanding of separation challenges. Our systems are designed not only for performance but also for adaptability capable of handling diverse feedstocks and evolving purity requirements. Whether upgrading fuel-grade ethanol to pharma-grade, integrating into existing infrastructure, or deploying new modular units, Sulzer ensures smooth implementation, operational reliability, and long-term value.
With a focus on innovation, we continue to push boundaries in energy efficiency, process electrification, and sustainable production.

Technical Highlights:

Anti-Fouling Tray Technology: VG™-AF and UFM™-AF valves reduce fouling and extend runtime, even with solids-rich feeds.
Structured Packing (MellapakPlus™): Up to 10× lower pressure drop than trays, improving energy efficiency and reducing bottom temperatures.
Advanced Dehydration Systems: Achieve <100 ppm water and >99.99% ethanol purity using green solvents, membranes, or mol sieves.
Energy Optimization: Steam consumption reduced by up to 95%, CO₂ emissions cut by up to 100%, with COP values between 7 and 20.
Flexible Feedstock Compatibility: Suitable for azeotropic ethanol, vapor or liquid phase feeds, and compatible with 1G to 4G bioethanol.
Skid-Mounted & Turnkey Solutions: Rapid deployment with full process guarantees and long-term membrane stability testing.
Side Stream Valorization: Recovery of fusel oil, acetic acid, and lactic acid for added value and sustainability.
Proven Reliability: Thousands of references since 1984, with complete automation and robust performance across all plant sizes.

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Advanced HEFA Process Technology for Low-Carbon Fuels

Renewable diesel and sustainable aviation fuel (SAF) are at the forefront of the global energy transition, offering scalable, drop-in alternatives to fossil-based transportation fuels. Using the Hydroprocessed Esters and Fatty Acids (HEFA) pathway, lipid-based feedstocks such as waste oils, fats, and greases can be converted into premium-quality fuels that meet the most stringent global specifications.

Sulzer delivers high-efficiency process technologies that enable producers to manufacture renewable diesel and SAF with low carbon intensity, high yields, and competitive economics. From early project development to commercial operation, our solutions support fast deployment, operational stability, and long-term profitability.

Navigating the complexities of bio-based separation

High yields of renewable diesel and SAF

Optional pretreatment technology allowing processing of highly contaminated feedstocks

Liquid-full reactor design for superior process control and catalyst life

Lowest total cost of production and fast payback, typically under three years

Renewable Diesel & SAF – Efficient Conversion of Renewable Feedstocks
Renewable diesel and SAF production via HEFA involves hydrotreating biogenic oils and fats to remove oxygen, saturate hydrocarbons, and produce paraffinic fuels. Compared to conventional biodiesel, renewable diesel and SAF exhibit superior fuel properties, including full compatibility with existing infrastructure, and lower lifecycle greenhouse gas emissions.

Feedstock Variability & Quality
Waste-derived and biogenic feedstocks often contain contaminants and exhibit wide compositional variability. Sulzer technologies are designed to handle diverse lipid feeds, including used cooking oil (UCO), animal fats, tallow, and distillers corn oil (DCO), without sacrificing performance.

Reactor Control
Advanced liquid-full reactor designs and integrated hydrogen management reduce operational risk and improve overall efficiency.

Economics & Speed to Market

With tight project timelines and capital discipline essential, Sulzer enables rapid project execution (< 24 months) and attractive payback periods through modular concepts, optimized equipment design, and reduced total cost of ownership.

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Delivering fuel quality that meets tomorrow’s standards

Biodiesel producers face increasing demands for cleaner fuels with improved cold flow characteristics and reduced sulfur content. Whether derived from vegetable oils, animal fats, or waste oils, biodiesel must meet stringent specifications such as EN 14214 and ASTM D6751. Sulzer’s distillation technology purifies trans-esterified and acid-esterified biodiesel, removing impurities and enhancing fuel quality. Our solutions integrate seamlessly into existing plants and offer scalable, cost-effective performance.

Key challenges in modern biodiesel refining:

Ultra-low sulfur compliance

Achieve <10 ppm sulfur to meet global fuel regulations and reduce emissions

Improved cold flow performance

Lower monoglycerides to enhance CFPP and ensure winter-grade biodiesel quality.

Efficient recovery of valuable streams

Recover high-purity methanol and glycerin with minimal energy consumption.

Feedstock flexibility & consistent quality

Process diverse inputs from waste oils to animal fats while maintaining product quality across seasons and regions.

Smart process solutions for high-efficiency biodiesel plants.
Sulzer delivers complete process solutions for biodiesel purification, including proprietary separation equipment, skid-mounted systems, and advanced distillation units. Our technology enables high FAME yield, low operating costs, reliable performance, reducing maintenance and maximizing uptime. From methanol recovery to glycerin refining, our systems are designed to meet international standards and support producers in scaling clean fuel production with confidence.

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Biofuels Industry

At Sulzer, we deliver advanced process solutions for the efficient production and purification of renewable fuels. Our portfolio includes technologies and proprietary equipment for distillation and dehydration, engineered to maximize heat integration, reduce energy consumption, and ensure high product purity. Designed for scalability and operational robustness, our technologies enable producers to meet demanding performance and sustainability targets across a wide range of bio-based applications.

Our Solutions

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