Waste To Energy Through Torrefaction
Keystone Energy uses its proprietary continuous torrefaction technology to convert waste into charcoal for industrial fuel applications. Keystone Energy's Torrefaction is an advanced thermochemical process that produces high-energy solid fuels known as Green Coal, BioChar, Charcoal, Torrefied Coal, Torrefied Charcoal, Torrefied Biomass, Torrefied MSW and others.
Keystone Energy Systems LLP and Keystone Green Energy Private Limited deploy torrefaction reactors, which operate at temperatures between 200° and 350°C in a controlled and low-oxygen environment. The process removes moisture and volatile substances to increase the fuel's energy density, grindability, and storage stability, resulting in an end product which is dry, brittle, carbon dense and the closest known alternative to coal for its applications.
Torrefaction Process
From complex waste to Green Coal
Keystone's proprietary torrefaction technology (patent application# 202211023704 & 202211023710) can convert any combination of MSW, RDF, Biomass, STP Sludge, Agricultural/Forrest/Textile/Other Waste and to a dry, brittle and carbon rich product with a calorific value of up to 4,500 Kcal/Kg known as Green Coal.
Waste Pandemic
Waste is everywhere and most of it is dumped, landfilled, not recycled and not utilized, causing wastage and pollution
Revolutionary Technology
Torrefaction is a thermal treatment process that involves heating MSW/ RDF/ Agro Waste/ STP Sludge in absence of oxygen, removing moisture and volatile compounds and increasing its energy density to produce the end product which is known as Green Coal.
Our Projects
- 500 Tons Per Day MSW Plant For NTPC Ltd. in Uttar Pradesh
- 200 Tons Per Day Biomass Plant For TransPacific Engineers in Punjab
- 100 Tons Per Day RDF Plant For Keystone Greentech in Telangana
- 50 Tons Per Day STP Sludge Pilot Plant For Delhi Jal Board in Delhi
Torrefaction Plant Configurations
Keystone Energy offers a variety of torrefaction plant configurations ranging from 50 to 1000 tons per day of input
MSW Torrefaction Plant
Converts Municipal Solid Waste (MSW) into high calorific value torrefied MSW and torrefied charcoal using proprietary torrefaction technology. Designed for landfill reduction, waste to energy conversion and mandated co-firing applications in thermal power plants.
Biomass Torrefaction Plant
Processes agricultural residue, woody biomass, and organic waste into torrefied biomass, biochar, and green coal. Improves energy density, fuel stability, grindability, and storage performance for industrial fuel applications.
RDF Torrefaction Plant
Upgrades Refuse Derived Fuel (RDF) into high CV torrefied fuel and waste-to-charcoal products through controlled thermochemical processing. Enables biomass utilisation and provides mandated torrefied pellets to thermal power plants.
STP Sludge Torrefaction Plant
Converts Sewage Treatment Plant (STP) sludge into high-calorific solid fuel using low-oxygen torrefaction processing. Reduces moisture content, improves fuel characteristics and enables sustainable sludge to energy conversion.
Keystone Energy is initiating a change towards sustainable energy, which converts Biomass to charcoal, MSW to charcoal, RDF to charcoal, and sludge to fuel using torrefaction technology, plays an important role in a variety of industrial applications, such as waste management systems, cement manufacturing, and power generation.
Gasification
Enhanced Waste Management Using Gasification
Keystone Energy's advanced Waste to Energy Gasification technology converts Municipal Solid Waste (MSW) and RDF into high CV synthesis gas (Syngas) for power generation applications. This fully automated gasification process enables sustainable waste management, landfill reduction, and green electricity generation through gas engines and industrial turbines.
Our gasification systems are designed for continuous industrial operation and support decentralised waste to energy infrastructure, industrial decarbonisation and sustainable power generation. The produced Syngas can be utilised for electricity generation, thermal energy recovery and industrial fuel applications across power plants, cement industries, and municipal waste processing facilities.
Credentials
Keystone Energy's gasification technology has been evaluated and approved by NGT appointed technical committees with participation from the National Environmental Engineering Research Institute (NEERI), Central Pollution Control Board (CPCB), Ministry of Environment & Forest (MoEF) and other environmental and waste to energy experts.
In 2017, NGT approved implementation of a 500 TPD Waste to Green Electricity gasification plant in Srinagar, validating the technology for large-scale Municipal Solid Waste (MSW) processing, waste to energy conversion and sustainable power generation applications.
FAQs
What is torrefaction?
Torrefaction is a thermochemical process that heats waste such as MSW, RDF, biomass and STP sludge to between 200° and 350°C in a controlled, low-oxygen environment. It removes moisture and volatile compounds, increasing the fuel's energy density, grindability and storage stability to produce a dry, carbon-rich solid fuel known as Green Coal.
What is Green Coal?
Green Coal is the dry, brittle, carbon-dense solid fuel produced by Keystone Energy's torrefaction process. It has a calorific value of up to 4,500 Kcal/kg and serves as a sustainable coal-replacement fuel for thermal power plants, cement plants, steel plants and industrial boilers.
What types of waste can Keystone Energy process?
Keystone Energy's continuous torrefaction technology can convert any combination of Municipal Solid Waste (MSW), Refuse Derived Fuel (RDF), biomass, agricultural residue and Sewage Treatment Plant (STP) sludge into Green Coal, biochar and torrefied fuel.
What is the calorific value of Keystone Energy's Green Coal?
Keystone Energy's Green Coal reaches a calorific value of up to 6,000 Kcal/kg deending on the feedstock's characteristics.
Which torrefaction projects has Keystone Energy delivere?
Keystone Energy has delivered a 500 TPD MSW plant for NTPC in Gorakhpur, a 200 TPD biomass plant for TransPacific Engineers in Punjab, a 100 TPD RDF plant in Warangal, and a 50 TPD STP-sludge pilot plant for Delhi Jal Board.
Is Keystone Energy's technology patented?
Yes. Keystone Energy's continuous torrefaction technology is covered by Indian patent applications 202211023704 and 202211023710, and its waste-to-energy gasification technology has been approved by an NGT-appointed committee including NEERI, CPCB and MoEF.
Phone
+91 011-69952419Copyright © 2026 Keystone Energy Systems LLP and Keystone Green Energy Pvt. Ltd. All rights reserved.