What Is a Wood Gas Generator?
A wood gas generator — also called a biomass gasifier or producer gas system — converts solid wood waste into combustible syngas that powers engines and turbines to generate electricity.
If you manage a sawmill, timber processing facility, wood pellet plant, or any operation generating significant quantities of wood residues, you are sitting on an untapped energy resource. A wood gas generator transforms wood chips, sawdust, bark, branches, and forestry residues into a clean-burning synthesis gas (syngas) that can fuel a generator set continuously — 24 hours a day, 365 days a year.
Unlike direct combustion, gasification operates at a fundamentally different thermochemical level. Wood waste is converted into a mixture of combustible gases — primarily carbon monoxide (CO), hydrogen (H₂), and methane (CH₄) — in a carefully controlled, oxygen-starved environment. This syngas is then cleaned, cooled, and fed into a gas engine to produce electricity.
Why Wood Gas Power Generation Is Growing Rapidly
Global demand for decentralized renewable energy is accelerating, and wood gas power plants sit at a compelling intersection: they solve a waste disposal problem while generating reliable baseload power — something intermittent renewables like solar and wind cannot do alone.
- Rising disposal costs for wood waste in the forestry and wood processing industries.
- Carbon neutrality mandates — biomass energy is considered carbon-neutral under most regulatory frameworks.
- Grid-independent power needs for remote industrial sites where utility connections are costly.
- Renewable energy incentive programs and feed-in tariffs in many countries that reward biomass electricity generation.
- Rising fossil fuel prices that make self-generated biomass power economically attractive.
Broad Feedstock Adaptability: Types of Wood Waste Accepted
The POWERMAX Wood Waste Gasification Power Plant is engineered to process a broad range of lignocellulosic biomass. Key material requirements: moisture content below 20% (wet basis) for CFBG systems, and specified particle size ranges per gasifier type.
Wood Processing Residues
Wood chips and hog fuel, sawdust and wood shavings, timber offcuts and wood scrap from furniture and panel manufacturing.
Forestry & Agricultural Biomass
Tree branches, prunings, bark, and logging residues from forestry operations and land clearing activities.
Densified Wood Products
Wood pellets and briquettes. These pre-densified forms offer ideal moisture content and uniform size, maximizing gasification efficiency.
From Wood Waste to Clean Power: The 3-Stage Process
Every POWERMAX wood waste gasification power plant operates through three integrated process stages — from raw biomass input to grid-quality electricity output.
1. Biomass Gasification
Wood waste is fed into the gasifier where it undergoes thermochemical conversion at 700–1,000°C in an oxygen-deficient environment. Solid biomass is converted into raw syngas — a mixture of CO, H₂, CH₄, CO₂, and N₂. This is the core of the wood gas generator process.
2. Syngas Purification
Raw producer gas from the gasifier contains dust, coke fines, and tar that would damage a gas engine. The purification train — cyclone dust collectors, electrostatic precipitators (ESP), gas scrubbers, coolers, and moisture separators — delivers clean, engine-grade fuel gas.
3. Power Generation
Purified syngas is fed into high-efficiency gas engine generator sets. High-temperature engine exhaust can be recovered via a waste heat boiler to produce steam or hot water. Steam turbines may also be integrated for a gas-steam combined cycle, boosting overall plant efficiency.
POWERMAX Wood Gas Generator Systems: Two Proven Technologies
POWERMAX engineers have developed two distinct gasification platforms to cover the widest possible range of feedstock types, plant scales, and project requirements — from 50 kW farm-scale to 20 MW industrial power stations.
POWERMAX CFBG Series — Circulating Fluidized Bed Gasifier
The "High-Capacity Specialist" for large-scale wood waste power generation. The CFBG series is designed for power outputs of 200 kW to 2,000 kW per gasifier unit, with multi-unit configurations for power stations up to 20 MW. Fluidized bed technology delivers exceptional fuel flexibility and high carbon conversion efficiency.
- Matched Fuel: Fine wood chips, sawdust, wood shavings (≤8–15 mm particle size).
- Capacity: 200 kW – 2,000 kW Modules (scalable to 20 MW).
- Key Advantage: High gas production volume, ideal for large-scale industrial wood waste streams.
POWERMAX TFBG Series — Twin-Fire Fixed Bed Gasifier
The "Versatile Workhorse" for small-to-medium wood waste power plants. The TFBG series covers 50 kW to 2,000 kW, and its unique twin-fire design accepts larger, chunkier wood pieces with higher moisture tolerance — ideal for logging residues and coarser biomass streams.
- Matched Fuel: Branches, bark, chunky wood offcuts (Dia. 20–80 mm; Length 10–80 mm).
- Capacity: 50 kW – 2,000 kW (Scalable).
- Key Advantage: Accepts higher moisture (up to 35%) and larger piece sizes — reducing pre-processing costs.
Technical Specifications
| Model | 200CFBG | 400CFBG | 500CFBG | 800CFBG | 1000CFBG | 2000CFBG |
| Rated Power | 200 kW | 400 kW | 500 kW | 800 kW | 1,000 kW | 2,000 kW |
| Biomass Consumption (kg/h) | 200–360 | 400–720 | 500–900 | 800–1,440 | 1,000–1,800 | 2,000–3,600 |
| Gas Output (Nm³/h) | 500–600 | 1,000–1,200 | 1,250–1,500 | 2,000–2,400 | 2,500–3,000 | 5,000–6,000 |
| Biomass Moisture | ≤ 20% (wet basis) | |||||
| Particle Size | ≤ 8–15 mm | |||||
| Gas Heat Value | 1,200–1,300 Kcal/Nm³ | |||||
| Gas Composition | CO 12–18%, H₂ 3–7%, CH₄ 4–8%, CO₂ 10–16%, N₂ 54–60% | |||||
| Rated Voltage | 220 / 400 / 440 / 6,300 / 6,600 / 11,000 / 13,800 V | |||||
| Model | 50TFBG | 100TFBG | 200TFBG | 500TFBG | 1000TFBG | 2000TFBG |
| Rated Power | 50 kW | 100 kW | 200 kW | 500 kW | 1,000 kW | 2,000 kW |
| Biomass Consumption (kg/h) | 50–100 | 100–200 | 200–400 | 500–1,000 | 1,000–2,000 | 2,000–4,000 |
| Gas Output (Nm³/h) | 125–150 | 250–300 | 500–600 | 1,250–1,500 | 2,500–3,000 | 5,000–6,000 |
| Biomass Moisture | ≤ 20–35% (wet basis) | |||||
| Particle Size | Diameter 20–80 mm; Length 10–80 mm | |||||
| Gas Heat Value | ≥ 1,200 Kcal/Nm³ | |||||
| Gas Composition | CO 15–20%, H₂ 15–20%, CH₄ up to 3%, CO₂ 8–12%, N₂ 45–50% | |||||
| Rated Voltage | 220 / 400 / 440 / 6,300 / 6,600 / 11,000 / 13,800 V | |||||
Engineering Note: All models feature Siemens technology alternators with Chinese top-brand medium-speed gas engines (500–1,000 rpm) or German Deutz gas engines (1,500 rpm) with advanced European engine control systems.
The Economics: Diesel vs. Wood Gas Generator
The Diesel ProblemFuel Cost: High ($1,000+ / ton) Cost Per kWh: $0.30 – $0.45 / kWh Risk: High price volatility and supply disruption risk. |
The Wood Gas SolutionFuel Cost: Near-zero (waste material, disposal cost avoided) Cost Per kWh: $0.04 – $0.09 / kWh Savings: 60–80% lower operating cost vs. diesel generation Result: Payback Period typically 3–6 years. |
Maximize Revenue: One Wood Waste Stream, Three Value Outputs
Output A: Electricity
Replace expensive grid power or diesel generators with 24/7 baseload electricity from your own wood waste.
Output B: Heat (CHP)
Recover waste heat from engine exhaust to produce steam or hot water for kiln drying, space heating, or industrial processes.
Output C: Biochar & Ash
Gasifier bottom ash and biochar (from TFBG systems) can be used as soil amendment or sold as agricultural inputs.
6 Key Advantages of POWERMAX Wood Gas Generator Systems
01 — Convert Waste Into Revenue
Wood waste that previously required landfill disposal or open burning becomes a primary fuel source. Mills and timber operators eliminate disposal costs while generating electricity for self-consumption or grid export.
02 — Carbon-Neutral Power Generation
Biomass gasification is recognized as carbon-neutral by most regulatory frameworks. Wood gas electricity qualifies for renewable energy incentives, feed-in tariffs, and carbon credit programs in many countries.
03 — Baseload, Not Intermittent
Unlike solar or wind, a wood gas generator produces power on demand, 24/7. It can serve as baseload power, backup generation, or peak-shaving — providing true energy security for off-grid and remote operations.
04 — Small Land Footprint
POWERMAX biomass gasification systems are compact and modular — a 1 MW wood gas power plant requires a fraction of the land area of equivalent solar installations, suitable for constrained industrial sites.
05 — Waste Heat Recovery (CHP)
High-temperature exhaust from gas engines can be captured by a waste heat boiler to generate process steam or hot water — achieving combined efficiencies that significantly improve overall plant economics.
06 — Modular & Scalable
Systems are based on a modular concept — multiple gasifier and genset units can be combined for target output, providing operational redundancy, simplified maintenance, and staged capacity expansion as needs grow.
Wood Gas Generator — Frequently Asked Questions
Q: What is the difference between a wood gas generator and a regular biomass boiler?
A conventional biomass boiler burns wood directly to produce steam for a steam turbine — an indirect, lower-efficiency process. A wood gas generator first converts biomass into combustible gas through gasification, then burns that gas in a high-efficiency gas engine. Gasification systems typically achieve higher electrical efficiency than biomass steam systems at smaller scales (below 5 MW), with lower capital costs and land requirements.
Q: How much wood waste does a wood gas power plant consume per hour?
Wood consumption depends on system size. As a general guide, POWERMAX systems consume approximately 1–2 kg of wood waste per kWh of electricity generated. A 500 kW plant consumes approximately 500–900 kg/hr of biomass. The TFBG series typically operates at the lower end of specific consumption due to its higher hydrogen content in the syngas.
Q: Can a wood gas generator run on wet wood or green chips?
Feedstock moisture is critical. POWERMAX CFBG systems require ≤20% moisture (wet basis). TFBG systems are more tolerant, accepting up to 35% moisture. For higher-moisture feedstocks, a pre-drying system can be integrated — often using waste heat from the gas engines to dry incoming biomass, creating an efficient closed-loop process.
Q: Is wood gas power generation considered renewable energy?
Yes. Under the regulatory frameworks of most countries — including EU Renewable Energy Directives and most national energy policies — biomass gasification electricity qualifies as renewable energy. Wood waste is classified as a carbon-neutral fuel because the CO₂ released was previously sequestered by growing trees. This makes wood gas power plants eligible for renewable energy incentives and feed-in tariff programs.
Q: What size wood gas generator do I need?
Sizing depends on your available wood waste supply and power demand. POWERMAX systems range from 50 kW (small sawmill) to 20 MW (large industrial cluster). If you generate more than 500 kg/day of dry wood waste, a 50–100 kW system may be viable. Our engineering team performs detailed feedstock and power assessments to recommend the optimal configuration for each project.
From Blueprint to Baseload: One-Stop EPC Service
Phase 1: Planning & Design
Feedstock analysis, feasibility studies, and custom site layout (CAD/3D). Power output sizing matched to your wood waste volume and energy demand.
Phase 2: Manufacturing
Factory pre-assembly and rigorous testing of all gasifier, purification, and genset modules before shipping. Quality-controlled before it leaves the factory.
Phase 3: Logistics & Installation
Global shipping and on-site engineering supervision. Modular containerized design enables rapid deployment — minimal civil construction required.
Phase 4: Training & Long-Term Support
O&M staff training, operations manuals handover, and lifetime technical consultation from POWERMAX engineers.
Ready to Turn Your Wood Waste Into Power?
Tell us about your project requirements.
Our engineers will assess your wood waste feedstock, site conditions, and power requirements — and provide a Free Feasibility Assessment within 24 hours.
