Renewable Gas Treating
In 2000, Morrow Energy built its first renewable plant. Today, Morrow has developed more than 20 raw biogas to high BTU plants, including 10 that were constructed and operated by Morrow Energy’s sister company, Morrow Renewables. Morrow has over 19 years of experience in LFG gathering, compression, treating, and marketing, as well as NSPS compliance assistance. Morrow is among the most active and successful RNG project developers in the RNG industry.
To remove unwanted components in landfill gas streams such as CO2, H2S, water, and heavy hydrocarbons, Morrow-built plants utilize selexol. Being a physical solvent, selexol is able to treat all trace elements with a methane efficiency of at least 98%. Selexol treating requires less compression compared to other treating methods, and therefore lowers operating and maintenance costs. Morrow has received two patents in biogas treating, both centered around the regeneration of selexol in landfill gas scenarios.
Amine is a regenerative, water-based solvent that chemically removes CO2 and H2S from digester gas streams using a contactor. The first cow manure-to-pipeline gas plant of its kind in the United States was designed and built by the Morrows, including the amine plant, compression, pipeline, and interconnect piping. Amine treating results in a high methane recovery efficiency (~99.9%), and operates at a low pressure of 10 psig. Furthermore, using an amine system for digester gas treating can greatly reduce heat costs. Up to 80% of the heat used to regenerate amine can be transferred to heating the digester itself.
Morrow offers several different options for H2S treating. We build vessel packages designed for any non-regenerable solid media scavengers with lead/lag configurations for maximum efficiency and zero downtime for changeouts. We design skids for non-regenerable liquid media scavengers for easy operation, minimal pressure drop, and low-cost changeouts. For higher concentrations of H2S or higher flow rates, Morrow offers a regenerable liquid treating package with minimal ongoing operating costs.
Our Wellfield Consulting service is based on our almost 20 years of wellfield control experience, where we have developed simple, easy-to-follow metrics that allow anybody to find and control the Oxygen and Nitrogen in their wellfield. Controlling the field means many things such as well spacing, types of wells, compaction around wells and constant monitoring. We look to control the Oxygen and Nitrogen to lower your CAPEX preventing the need for a Nitrogen Rejection Unit. We own and operate 8 plants and by controlling the wellfield we do not operate a single NRU. By controlling the field our yield has improved on all of our facilities maximizing our Methane sold to market. Morrow Energy is confident in our ability to maximize your production, minimize your CAPEX and provide a solution for the life of your landfill.
Morrow Energy offers two services to control Nitrogen in landfill applications, field consulting and nitrogen rejection equipment. Morrow’s unique field experience has led to easy-to-follow procedures that can reduce Nitrogen coming out of the wellfield, reduce odor complaints, and increase the gathering efficiency to net more methane that can be sold. When control of the wellfield is impossible or impractical, Morrow also builds cryogenic Nitrogen Rejection Units. Utilizing the principle of separation by boiling point, these NRUs operate at a 99.9% methane efficiency. When paired with a Morrow CO2 treating plant, the total methane efficiency can be above 96%.