SPX BioTar™

Engineered biomass-derived tar for industrial materials, energy and carbon applications. Agricultural residues, through controlled thermal conversion, become a traceable industrial feedstock — measured, classified and matched to application.

What is SPX-BIO-TAR™?

A separate product family within the SPX circular-biomass platform.

SPX-BIO-TAR™ is a family of biomass-derived tar fractions produced during controlled thermal conversion of agricultural and other approved biomass residues. Depending on the process, operating conditions and downstream separation, the resulting tar can have significantly different physical and chemical characteristics — so SPX-BIO-TAR™ is classified by application priority and measured specification, rather than treated as one universal product.

Capture the carbon. Characterise the material. Match it to the application.
AgriculturalResiduesThermalConversionSPX-BIO-TARIndustrialApplications
From Biomass to SPX-BIO-TAR™

Feedstock → Processing → SPX Products → Markets

Paddy strawMaize residuesAgricultural residuesForestry biomassApproved biomass waste streams
Pre-processing→Thermal Conversion→ Vapour/Condensate Recovery→Separation→ Conditioning→Testing

Markets: Industrial Materials · Binders · Coatings · Energy · Construction · Carbon Products · Chemical R&D

ThermalConversionSPX-BIO-OILSPX-BIO-TARSPX-BIOCHARSPX-SYNGAS
SPX-BIO-TAR™ Product Family

The same 30–100 priority architecture across the SPX product family.

Product Priority Development / application focus
SPX-BIO-TAR 30P30Basic industrial material applications
SPX-BIO-TAR 40P40Industrial binder/material applications
SPX-BIO-TAR 50P50Coating and surface-treatment development
SPX-BIO-TAR 60P60Construction/material applications
SPX-BIO-TAR 70P70Energy and thermal applications
SPX-BIO-TAR 80P80Advanced material/industrial applications
SPX-BIO-TAR 90P90Chemical/feedstock development
SPX-BIO-TAR 100P100Premium specialty-material development

These are application grades, not an assertion that 100 is inherently “better” than 30. The final grade is assigned only after defined laboratory testing and qualification for its intended use.

SPX-BIO-TAR™ Quality Parameters

The analytical package depends on the intended application.

Physical properties
  • Moisture
  • Density
  • Viscosity
  • Solids
  • Ash
  • Softening behaviour
  • Pour/flow behaviour
  • Phase stability
  • Storage stability
Chemical properties
  • Total carbon
  • Hydrogen
  • Oxygen
  • Nitrogen
  • Sulphur
  • Chlorine
  • Acidity / TAN
  • Volatile compounds
  • Selected metals
  • PAH profile (where relevant)

The testing specification is developed around the actual intended end use, rather than assuming one universal bio-tar specification.

SPX-BIO-TAR™ Use Cases

Nine development pathways, from industrial binders to circular industrial energy.

01 — Industrial Binder

Selected biomass-derived tar fractions as a component of industrial binder systems — material bonding, aggregate binding, industrial formulations, biomass-derived construction materials. Actual performance is established through application-specific testing.

Pathway: Biomass → Thermal conversion → SPX-BIO-TAR → Formulation/conditioning → Industrial binder

02 — Road & Construction Materials

A research pathway for appropriately characterised bio-tar fractions in bituminous or alternative binder systems — testing adhesion, viscosity, softening behaviour, water resistance, durability and mechanical performance. Marketed as a material-development application, not a direct bitumen replacement.

Pathway: SPX-BIO-TAR → Material formulation → Laboratory testing → Mechanical & durability testing → Field trial → Commercial qualification

03 — Waterproofing & Protective Coatings

Selected tar fractions investigated for industrial coating formulations across construction materials, industrial surfaces, wood protection and water-resistant/corrosion-protection formulations, subject to applicable safety and performance requirements.

Pathway: SPX-BIO-TAR → Coating formulation → Applicable-standard testing → Qualified coating

04 — Wood & Biomass Material Protection

Bio-based protective treatments for appropriate materials — investigating water resistance, surface durability, biological resistance, adhesion and weathering performance.

Pathway: SPX-BIO-TAR → Formulation → Surface treatment → Material protection

05 — Industrial Fuel / Thermal Application

Certain tar streams may have combustible properties, but not every grade is sold as a fuel — a dedicated grade is developed only where heating value, viscosity, ash, contaminants and handling characteristics suit a defined thermal system.

Pathway: SPX-BIO-TAR 70 → Conditioning → Burner/thermal system qualification → Industrial heat

06 — Chemical Feedstock

One of the higher-value SPX-BIO-TAR pathways — separation, chemical characterisation, fractionation/upgrading into chemical intermediates such as carbon-rich intermediates, aromatic compounds, phenolic fractions and specialty chemicals.

Pathway: SPX-BIO-TAR 90/100 → Separation → Chemical characterisation → Fractionation/upgrading → Chemical intermediates

07 — Resin & Composite Materials

Investigating bio-tar-derived components in resins, composites, panels and engineered materials — moving the product from a low-value by-product toward a higher-value material feedstock.

Pathway: Biomass → SPX-BIO-TAR → Chemical modification → Bio-based resin → Composite material

08 — Carbon-Based Materials

Selected streams investigated as precursors or additives in carbon-material development — activated carbon, conductive materials, adsorbent materials and composite additives, each requiring application-specific laboratory validation.

Pathway: SPX-BIO-TAR → Thermal/chemical treatment → Carbon-rich material → Advanced material applications

09 — Circular Industrial Energy

SPX-BIO-TAR™ is one component of the complete NZLoop system — a multi-product biomass refinery model rather than dependence on a single product.

Pathway: Agricultural waste → Pyrolysis/thermal conversion → SPX-BIO-OIL + SPX-BIO-TAR + SPX-BIOCHAR + SPX-SYNGAS → Multiple markets

SPX-BIO-TAR™ + Soil Passport™

Every commercial batch receives a Digital Bio-Tar Passport.

SPX-BIO-TAR 80 — Example batch
Batch: SPX-BIOTAR-OD-000801
Feedstock: Maize residue
Origin: Nabarangpur, Odisha
Production date: XX/XX/2026
Batch quantity: XX tonnes
Process & laboratory record
  • Reactor
  • Temperature
  • Residence time
  • Feedstock moisture
  • Yield
  • Density
  • Viscosity
  • Ash
  • Carbon
  • Hydrogen
  • Sulphur
  • Selected metals
SPX-BIO-TAR™ Digital Passport

Measure → Verify → Trace → Trade

Biomass Source→Production Process→ SPX-BIO-TAR Batch→Laboratory Results→ Application Grade→Customer→ End Use→Carbon & Environmental Data
Customer Use Cases

A qualified material pathway, not an untested generic tar.

Construction Materials Company

8-step qualification

Material requirements → candidate grade → laboratory characterisation → formulation development → performance testing → pilot-scale trial → field validation → commercial qualification.

Industrial Customer

Traceable replacement pathway

Agricultural residue → SPX thermal conversion → SPX-BIO-TAR → conditioning/formulation → industrial application → digital product passport, so the customer can track origin and measured properties.

Farmer / FPO

Agricultural Waste → Industrial Products → Energy → Carbon → Rural Value

Biomass collection → FPO/Mandi → SPX processing → Bio-Oil + Bio-Tar + Biochar + Energy → multiple commercial markets — the farmer does not need to find a market for residue independently.

SPX-BIO-TAR™ Quality Philosophy

We don't simply ask “is this bio-tar?”

Feedstock

Where did it come from?

Process

How was it produced?

Characterisation

What is it, chemically & physically?

Application

What can it do?

Traceability

Can we prove it?

Carbon intelligence

What is its carbon profile?

SPX-BIO-TAR™ vs SPX-BIO-OIL™

Two carbon-rich fractions, different application focus.

SPX-BIO-OIL™ SPX-BIO-TAR™
Primary conceptRenewable pyrolysis liquidHeavier carbon-rich fraction
Industrial heat✓Potential
Power pathway✓Potential
Refinery/upgrading✓Potential
Binder/materialsPotential✓
CoatingsPotential✓
Construction materialsR&D✓
Chemical feedstock✓✓
Carbon-material R&DPotential✓
Digital Passport✓✓

The exact composition and properties depend on the feedstock and thermal-conversion technology — SPX avoids treating “bio-oil” and “bio-tar” as universally fixed chemical products.

What SPX-BIO-TAR™ Is NOT

Important for credibility.

SPX-BIO-TAR™ is not marketed as a direct substitute for conventional bitumen, a universal fuel, or an automatic carbon-credit generator. Carbon-credit eligibility is assessed separately under an applicable recognised methodology rather than assumed from the existence of a Bio-Tar Passport.

SPX-BIO-TAR™ grades are application-specific materials whose suitability is established through defined specifications, laboratory testing and customer qualification.
Other SPX™ Pathways

Explore the rest of the SPX™ ecosystem.

FAQ

SPX BioTar™ questions, answered.

Q

What is SPX BioTar™?

SPX-BIO-TAR™ is Soil Passport's engineered biomass-derived tar product platform — controlled thermal conversion of biomass into a dense, viscous material for industrial applications, produced as application-specific grades.

Q

What feedstocks are used for SPX BioTar™?

Lignin-rich biomass and forestry residue, processed through controlled thermal or carbonisation conversion.

Q

What is SPX BioTar™ used for?

Core applications include industrial binders, sealants and adhesives, displacing petrochemical-derived tar. Potential applications include asphalt/bitumen-related research and construction composites, subject to product testing and specification.

Q

How many SPX BioTar™ grades are there?

SPX-BIO-TAR™ is produced across 8 application-specific grades, each qualified through defined specifications and laboratory testing.

Q

Is SPX BioTar™ validated for construction use?

Construction and materials applications are treated as potential, not core, until backed by product testing and specification for the relevant use case — we avoid claiming a validated application before that qualification work is done.

Q

What is the digital Bio-Tar Passport?

A traceability record for each SPX-BIO-TAR™ batch, documenting feedstock source, conversion process and grade specification.

Q

How can I request a technical datasheet or pilot?

Use the Partner application on the Partners page to request a technical datasheet, discuss a pilot project, or partner with SPX on bio-tar.

Turning biomass by-products into industrial value.

👋Need help finding something?
Soil Passport Assistant
Hi — I can point you to the right place. Are you a farmer, a potential partner, interested in the marketplace, or just browsing?