Ethanol

Molecular Structure

Molecular Details

Molecular Formula	C₂H₅OH
Molecular Weight	46.07 g/mol
State	Liquid at standard conditions

Olefinverbund Integration

Chemistry & Engineering

Reaction Equation	C₂H₄ + H₂O ⇄ C₂H₅OH
Thermodynamics	Exothermic (-45 kJ/mol)
Catalyst System	Phosphoric acid on silica support
Reactor Class	Fixed bed hydration reactor at 60-70 bar, 300°C
Process Considerations	Direct hydration of ethylene is more efficient than fermentation for initial synthetic chemistry loop.

Extraterrestrial Production Pattern

1. Catalytic hydration of ethylene over H₃PO₄/SiO₂ catalyst
2. Operating at 300°C and 70 bar pressure
3. Alternative: Direct CO₂ + H₂ synthesis over Cu-based catalysts
4. Distillation and molecular sieve drying for anhydrous product

Applications

• Solvent for pharmaceuticals and chemicals
• Fuel and fuel additive
• Ethyl acetate production
• Disinfectant and sanitizer

Reaction Diagram

Overall Reaction: C6H12O6 -> 2 C2H5OH + 2 CO2 (fermentation)

Unit Operations

Process steps following chemical engineering unit operation principles:

Step	Operation	Description
1	Mashing	Prepare fermentable sugar solution
2	Fermentation	Yeast fermentation at 30-35°C for 48-72h
3	Distillation	Beer still to 50% then rectification to 95%
4	Dehydration	Molecular sieve dehydration to >99.5%
5	Denaturing	Add denaturant for industrial grade
6	Storage	Store in SS or lined tanks

S88 Batch Control Model

This module follows the ISA-88 (S88) batch control standard. Below is a simplified BatchML schema for educational purposes:

<?xml version="1.0" encoding="UTF-8"?>
<!-- ISA-88 Batch Control Model for Ethanol -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="ETHANOL_FERMENTATION_CELL">
    <Description>Process cell for Ethanol production</Description>
    
    <Unit ID="ETHANOL_FERMENTATION">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="MASH_TUN">
        <Description>Mash Tun</Description>
      </EquipmentModule>
      <EquipmentModule ID="FERMENTER">
        <Description>Fermenter</Description>
      </EquipmentModule>
      <EquipmentModule ID="DISTILLATION">
        <Description>Distillation</Description>
      </EquipmentModule>
      <EquipmentModule ID="MOLECULAR_SIEVE">
        <Description>Molecular Sieve</Description>
      </EquipmentModule>
      <EquipmentModule ID="BLEND_TANK">
        <Description>Blend Tank</Description>
      </EquipmentModule>
      <EquipmentModule ID="STORAGE">
        <Description>Storage</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="ETHANOL_FERMENTATION_RECIPE">
    <Description>Master recipe for Ethanol</Description>
    <ProductID>ETHANOL</ProductID>
    
    <UnitProcedure ID="ETHANOL_FERMENTATION_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="MASH">
          <Description>Mash phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_02">
        <Description>Operation 2</Description>
        <Phase ID="FERMENT">
          <Description>Ferment phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_03">
        <Description>Operation 3</Description>
        <Phase ID="DISTILL">
          <Description>Distill phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_04">
        <Description>Operation 4</Description>
        <Phase ID="DEHYDRATE">
          <Description>Dehydrate phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_05">
        <Description>Operation 5</Description>
        <Phase ID="DENATURE">
          <Description>Denature phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_06">
        <Description>Operation 6</Description>
        <Phase ID="STORE">
          <Description>Store phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
    </UnitProcedure>
  </MasterRecipe>
  
</BatchML>

**Key S88 Concepts:**
- **Process Cell**: The physical grouping containing all equipment for this process
- **Unit**: The major equipment that performs the synthesis
- **Equipment Modules**: Individual pieces of equipment (reactors, columns, etc.)
- **Unit Procedure**: The sequence of operations to produce the product
- **Phases**: The lowest level of procedural control (e.g., REACT, SEPARATE, PURIFY)

Key S88 Concepts:
• Process Cell: Physical grouping containing all equipment
• Unit: Major equipment performing synthesis
• Equipment Modules: Individual pieces (reactors, columns, etc.)
• Phases: Lowest level of procedural control (REACT, SEPARATE, etc.)

---

This Synthesis Module is part of the 100chemicals Olefinverbund — an integrated chemical production network designed for extraterrestrial civilization on Moon and Mars.