Eco-Tec biogas purification technology wins contract for greenhouse gas-to-energy project
Ontario based Eco-Tec announces that it has been awarded the contract for a biogas purification system by the Régie de gestion des matières résiduelles de la Mauricie (RGMRM) of Quebec. The integrated process includes the capture, purification and use of biogas as an renewable energy source for greenhouses. Growing products in greenhouses is highly energy intensive, making a switch to the use of locally available biomass waste economical.
RGMRM is a municipal organization that operates most of the municipal landfills in the Mauricie region in Quebec. The landfills, such as the Saint-Étienne-des-Grès landfill and the Trois-Rivières landfill have life spans of over 60 years. Each year one landfill will generate 18,000,000 m3 (635.7 million ft3) of biogas, the energy equivalent of 9,000,000 m3 (318 million ft3) of natural gas. RGMRM has developed and implemented plans to capture the biogas and use it in sustainable development projects that are designed to reduce greenhouse gas (GHG) emissions by approximately 135,000 tons of CO2.
RGMRM's projects have three major advantages: they provide plans to use an environmentally sustainable process to manage the entire life cycle of buried waste; they allow a renewable energy generated from biogas to replace a fossil fuel; and the projects are becoming sources of revenue for RGMRM and the municipalities that use and sell the biogas.
Purification
Biogas is a mixture of methane (CH4) and carbon dioxide (CO2) obtained from the anaerobic fermentation of biomass. However, the renewable gas is often contaminated with toxic quantities of hydrogen sulfide (H2S). To upgrade the biogas into natural gas quality biomethane, purification technologies are applied. Eco-Tec's biogas scrubbing system was selected for RGMRM's projects because of its high efficiency: it removes more than 99% of H2S, results in lower sulfur dioxide (SO2) emissions, reduced equipment corrosion, while offering a solution to other process problems associated with H2S.
The key innovation, from which other advantages arise, is the extremely high mass transfer rate generated by the proprietary gas-liquid contacting system (technical description here). Chemical costs are reduced through the combination of reduced catalyst inventories and concentration, a result of the increased mass transfer rates:
energy :: sustainability :: biomass :: bioenergy :: biofuels :: landfill :: biogas :: purification :: cogeneration ::
The unit is not affected by fluctuations in biogas feed rates and H2S concentration within the feed, and may be scaled up or down very efficiently. The system also includes self-induced gas flow, which may reduce or eliminate the need for a fan, blower or compressor, and low-pressure drop across the system.
The elemental sulfur by-product is non-hazardous and can be disposed of safely with biosolids, as a fertilizer or in a landfill.
The system was designed to integrate into RGMRM's process, that includes gas conditioning through the removal of water, sulfur and H2S. After purification, the natural gas quality methane is ready for use in power generation, cogeneration and heating applications such as, in this case, heat for tomato greenhouses.
The biogas technology joined Eco-Tec's product lines as an innovation from the researchers from the University of Toronto's Department of Chemical Engineering and Applied Chemistry. Dr. James Smith invented the patented process and joins Eco-Tec in bringing economical and effective Biogas Purification to the global market.
The technology can be used across a wide variety of industries including: pulp and paper mills, landfill gas, industrial processing, wastewater treatment plants, food and beverage processing and meat rendering plants. The biogas purification system reduces greenhouse gases, creates minimal waste and increases energy recovery.
Eco-Tec was recently awarded the Canadian Innovation Award for Environmental Technology, by the Canadian Manufacturers and Exporters association, for this biogas technology.
References:
Eco-Tec: Biogas Purification - Technical Paper [*.pdf].
Eco-Tech: Bg Pur - Technical Paper [*.pdf].
RGMRM is a municipal organization that operates most of the municipal landfills in the Mauricie region in Quebec. The landfills, such as the Saint-Étienne-des-Grès landfill and the Trois-Rivières landfill have life spans of over 60 years. Each year one landfill will generate 18,000,000 m3 (635.7 million ft3) of biogas, the energy equivalent of 9,000,000 m3 (318 million ft3) of natural gas. RGMRM has developed and implemented plans to capture the biogas and use it in sustainable development projects that are designed to reduce greenhouse gas (GHG) emissions by approximately 135,000 tons of CO2.
RGMRM's projects have three major advantages: they provide plans to use an environmentally sustainable process to manage the entire life cycle of buried waste; they allow a renewable energy generated from biogas to replace a fossil fuel; and the projects are becoming sources of revenue for RGMRM and the municipalities that use and sell the biogas.
Purification
Biogas is a mixture of methane (CH4) and carbon dioxide (CO2) obtained from the anaerobic fermentation of biomass. However, the renewable gas is often contaminated with toxic quantities of hydrogen sulfide (H2S). To upgrade the biogas into natural gas quality biomethane, purification technologies are applied. Eco-Tec's biogas scrubbing system was selected for RGMRM's projects because of its high efficiency: it removes more than 99% of H2S, results in lower sulfur dioxide (SO2) emissions, reduced equipment corrosion, while offering a solution to other process problems associated with H2S.
The key innovation, from which other advantages arise, is the extremely high mass transfer rate generated by the proprietary gas-liquid contacting system (technical description here). Chemical costs are reduced through the combination of reduced catalyst inventories and concentration, a result of the increased mass transfer rates:
energy :: sustainability :: biomass :: bioenergy :: biofuels :: landfill :: biogas :: purification :: cogeneration ::
The unit is not affected by fluctuations in biogas feed rates and H2S concentration within the feed, and may be scaled up or down very efficiently. The system also includes self-induced gas flow, which may reduce or eliminate the need for a fan, blower or compressor, and low-pressure drop across the system.
The elemental sulfur by-product is non-hazardous and can be disposed of safely with biosolids, as a fertilizer or in a landfill.
The system was designed to integrate into RGMRM's process, that includes gas conditioning through the removal of water, sulfur and H2S. After purification, the natural gas quality methane is ready for use in power generation, cogeneration and heating applications such as, in this case, heat for tomato greenhouses.
The biogas technology joined Eco-Tec's product lines as an innovation from the researchers from the University of Toronto's Department of Chemical Engineering and Applied Chemistry. Dr. James Smith invented the patented process and joins Eco-Tec in bringing economical and effective Biogas Purification to the global market.
The technology can be used across a wide variety of industries including: pulp and paper mills, landfill gas, industrial processing, wastewater treatment plants, food and beverage processing and meat rendering plants. The biogas purification system reduces greenhouse gases, creates minimal waste and increases energy recovery.
Eco-Tec was recently awarded the Canadian Innovation Award for Environmental Technology, by the Canadian Manufacturers and Exporters association, for this biogas technology.
References:
Eco-Tec: Biogas Purification - Technical Paper [*.pdf].
Eco-Tech: Bg Pur - Technical Paper [*.pdf].
2 Comments:
You are still going to have the CO2, making the quality far from Natural Gas. It's ~ 600 BTU/cu.ft vs. 1000 BTU/cu.ft.
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