# Biosynthetic ethylene & bio-ethylene oxide

Producing the world's most ubiquitous petrochemical building block from renewable biomass and captured carbon.

Source: https://en.bioecon.ru/technology/biosynthetic-ethylene-bio-ethylene-oxide/
Updated: 2026-08-18



## Overview and value chain

Markers: [EC: 20.14 | OECD: industrial-biotech | Regulator: EPA (US), REACH (EU), MEE (CN)]

Ethylene is the fundamental building block of the global petrochemical industry, traditionally produced via highly energy-intensive steam cracking of fossil naphtha or ethane. Biosynthetic ethylene and its critical derivative, bio-ethylene oxide (bio-EO), are instead produced primarily through the catalytic dehydration of renewable bioethanol. By providing an exact, chemically identical "drop-in" molecule, bio-ethylene allows the plastics, packaging, and surfactant industries to aggressively decarbonize their supply chains without re-engineering downstream manufacturing infrastructure. Global capacity is surging as FMCG brands mandate sustainable packaging.

The key directions of biosynthetic ethylene are:
1. **Bio-Polyethylene (Bio-PE):** polymerizing bio-ethylene to create green plastics for packaging, saving up to 3 tons of CO2 per ton of plastic.
2. **Bio-Ethylene Oxide (Bio-EO):** oxidizing bio-ethylene to produce green surfactants, glycols, and PET resins for the textile industry.
3. **Ethanol-to-Ethylene (EtE):** optimizing the catalytic dehydration process to reach 99%+ conversion efficiency from 1G and 2G bioethanol.
4. **Gas Fermentation (Gas Fermentation):** utilizing engineered microbes to convert industrial off-gases directly into ethanol or ethylene precursors.

### Sectoral value chain

```
[Feedstock] ──> [Fermentation] ──> [Dehydration] ──> [Polymerization]
                                  │
                          (Platform Chemicals)
                                  │
                                  ▼
[Consumer Goods] <─── [Manufacturing] <─────┘
```

### Value chain levels

| Level | Description | Key inputs/outputs |
|:---|:---|:---|
| **1. Feedstock sourcing** | Procuring sugarcane, corn, or industrial CO2 | **In:** Biomass, off-gas.<br>**Out:** Raw sugars/gas. |
| **2. Ethanol production** | Fermenting sugars or gases into bioethanol | **In:** Raw sugars/gas.<br>**Out:** Bioethanol. |
| **3. Catalytic dehydration** | Converting bioethanol into bio-ethylene | **In:** Bioethanol.<br>**Out:** Bio-ethylene gas. |
| **4. Chemical derivatization** | Oxidizing ethylene into bio-ethylene oxide | **In:** Bio-ethylene gas.<br>**Out:** Bio-EO, MEG. |
| **5. Polymerization** | Synthesizing green plastics and resins | **In:** Bio-ethylene, MEG.<br>**Out:** Bio-PE, Bio-PET. |
| **6. Downstream manufacturing** | Producing packaging and consumer products | **In:** Bio-PE, Bio-PET.<br>**Out:** Consumer goods. |

Cross-cutting technologies of the sector:
- **Alumina/Zeolite Catalysis:** specialized solid acid catalysts that lower the activation energy required for ethanol dehydration.
- **Microbial Gas Fermentation:** deploying acetogenic bacteria in continuous bioreactors to metabolize CO2 and CO into ethanol.
- **Mass Balance Accounting:** strict traceability protocols required by REACH and ISCC to verify the renewable content of drop-in chemicals.

---

## US

The US leverages its massive corn ethanol infrastructure and cutting-edge biotech ecosystem to pioneer alternative ethylene pathways.

### corn ethanol leverage, gas fermentation, corporate off-take
- **LanzaTech Innovation:** scaling commercial gas fermentation plants that capture steel mill emissions to produce ethanol for bio-ethylene.
- **Dow Chemical Partnerships:** collaborating with global suppliers to integrate massive quantities of bio-PE into North American supply chains.
- **Cemvita Factory:** engineering specialized microbes to secrete ethylene directly from CO2 and water, bypassing the ethanol intermediate entirely.

---

## CN

China is heavily investing in coal-to-olefins alternatives, pushing bio-based platform chemicals to improve industrial self-sufficiency and hit carbon peak targets.

### domestic substitution, mega-refineries, industrial symbiosis
- **Sinopec Mega-projects:** integrating bio-ethylene production into massive state-owned petrochemical complexes to diversify away from imported oil.
- **Biomass Mobilization:** utilizing the nation's vast agricultural residue (corn stover, wheat straw) as a second-generation (2G) cellulosic ethanol feedstock.
- **Green Manufacturing Mandates:** state directives forcing domestic packaging and textile sectors to adopt bio-PET and bio-PE.

---

## EU

The EU is the world's most aggressive regulatory environment for petrochemical decarbonization, driving massive demand for bio-EO and bio-PE.

### REACH compliance, bio-surfactants, technology licensing
- **Technip Energies (Hummingbird):** licensing highly efficient, proprietary ethanol-to-ethylene (EtE) technology to global chemical producers.
- **Clariant Sunliquid:** advancing 2G cellulosic ethanol platforms to feed sustainable European chemical pipelines.
- **EU Plastics Tax:** imposing heavy financial penalties on non-recycled fossil packaging, heavily incentivizing the adoption of bio-based drop-in plastics.

---

## Leading companies and research institutes

| Company / Institute | Country | Key products / platforms | Tech features | Status 2026 |
|:---|:---|:---|:---|:---|
| **Braskem** | 🇧🇷 Brazil | *I'm green Bio-PE* | Sugarcane ethanol-to-ethylene | commercial |
| **Technip Energies** | 🇫🇷 France | *Hummingbird EtE* | Proprietary dehydration catalysis | commercial |
| **LanzaTech** | 🇺🇸 USA | *CarbonSmart ethanol* | Gas fermentation to olefins | commercial |
| **India Glycols** | 🇮🇳 India | *Bio-EO and MEG* | Green surfactants and textiles | commercial |
| **Dow** | 🇺🇸 USA | *Renewable plastics* | Drop-in chemical integration | commercial |
| **Sinopec** | 🇨🇳 China | *Bio-based chemicals* | Mega-scale industrial integration | commercial |

---

## Tech stack and innovations

Producing bio-ethylene requires massive chemical engineering scale and highly stable catalytic processes.

1. **Catalytic Dehydration (EtE):**
   - The endothermic dehydration of ethanol (C2H5OH → C2H4 + H2O) occurs in fluidized or fixed-bed reactors at 300–500°C.
   - Advanced zeolite and synergistic alumina catalysts ensure >99% ethylene selectivity, preventing the formation of diethyl ether byproducts.
2. **Direct Microbial Synthesis:**
   - Emerging synthetic biology approaches utilize engineered cyanobacteria or *E. coli* containing an ethylene-forming enzyme (EFE).
   - Allows microbes to convert CO2 and sunlight directly into ethylene gas, which bubbles out of the bioreactor for continuous collection.
3. **Ethylene Oxide (EO) Synthesis:**
   - Bio-ethylene is subjected to direct oxidation over a silver-based catalyst at 250°C.
   - Bio-EO is highly reactive and explosive, requiring complex, tightly controlled micro-channel reactors before being converted to stable glycols.

---

## Value chains and production pipelines

### Industrial pipeline of bio-ethylene production (ISCC PLUS Standards)

```
┌───────────────────────────┐      ┌───────────────────────────┐
│ 1. Feedstock preparation  │ ───> │ 2. Bioethanol fermentation│
└───────────────────────────┘      └───────────────────────────┘
                                                 │
                                                 ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 4. Product purification   │ <─── │ 3. Catalytic dehydration  │
└───────────────────────────┘      └───────────────────────────┘
              │
              ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 5. Downstream derivatizat.│ ───> │ 6. Commercial integration │
└───────────────────────────┘      └───────────────────────────┘
```

#### Stage 1: Feedstock preparation
Milling and hydrolyzing agricultural biomass (like sugarcane or corn) into fermentable sugars, or capturing industrial CO2 for gas fermentation.

#### Stage 2: Bioethanol fermentation
Inoculating the sugars or off-gases with industrial yeast or acetogenic bacteria in massive anaerobic bioreactors to produce fuel-grade bioethanol.

#### Stage 3: Catalytic dehydration
Vaporizing the bioethanol and passing it over heated solid-acid zeolite catalysts in a high-temperature reactor to strip away water molecules.

#### Stage 4: Product purification
Scrubbing, compressing, and cryogenically distilling the resulting gas stream to achieve 99.9% polymer-grade bio-ethylene.

#### Stage 5: Downstream derivatization
Feeding the pure bio-ethylene into polymerization reactors to create Bio-PE, or oxidizing it over silver catalysts to produce Bio-Ethylene Oxide.

#### Stage 6: Commercial integration
Shipping the green plastic pellets or bio-surfactants to FMCG manufacturers, utilizing ISCC PLUS mass-balance certification to claim carbon reduction.