New Probe for Optimising the Biogas Upgrading Process

Vaisala, a global leader in environmental and industrial measurements, has launched a new instrument for off-gas methane and carbon dioxide measurements in the biomethane production process. Robust, reliable, and compact, the Vaisala CARBOCAP® MGP262 multigas instrument provides continuous measurement data to help optimise and control the biogas upgrading process for greater biomethane yield, process efficiency, and environmental benefits.

The novel Vaisala MGP262 provides a unique and accurate solution to measure methane and carbon dioxide in off-gas in the biomethane production process. It is the world’s first and only in situ instrument that measures off-gases optically with Vaisala’s patented CARBOCAP® technology.

“The new Vaisala MGP262 provides high-quality data to determine greenhouse gas composition from the off-gas in biogas upgrading processes. The data can be used to optimise the process more efficiently, resulting in greater profits, lower emissions and less wasted resources,” says Product Manager Antti Heikkilä, Industrial Measurements, Vaisala.

Slipping methane results in slipping profits

When biogas is upgraded to biomethane, methane is separated from carbon dioxide and other gases that are present in the raw biogas. In the upgrading process, carbon dioxide passes into the off-gas but methane remains in the main gas stream and can be used as a renewable fuel. However, a small amount of methane slips into the off-gas stream.

Heikkilä explains further: “Methane slip is a process where methane is not captured but lost into the atmosphere. As methane is a harmful greenhouse gas, approximately 20 times worse than carbon dioxide, minimising this slip needs to be taken seriously. If methane slip is not controlled, the environmental benefits of using biomethane gas are reduced, and so is the yield. The MGP262 provides the ability to control the upgrading process and lets our customers focus on producing the best quality biomethane possible. An optimised and efficient biomethane recovery process both enables greater profits and brings greater benefits for the environment.”

A sustainable end-to-end measurement solution for the biogas sector

The new MGP262 follows Vaisala’s award winning MGP261 multigas measurement instrument, which provides continuous methane, carbon dioxide, and humidity readings directly in the biogas process pipeline. The MGP262 monitors the backend of the upgrading process. Together they provide accurate and reliable in-line measurements to help optimise biogas production and biomethane upgrading end-to-end.

“There are some key points to consider in efficient biogas production. Firstly, protecting the combined heat and power engine from excess moisture during the process to avoid corrosion and breakdowns. This is where the ground-breaking MGP261 is in a class of its own,” Heikkilä states. “Secondly, it’s important to control the whole process down to off-gassing with MGP262 to minimise the losses and negative environmental impacts caused by uncontrolled methane emissions.”

The MGP262 has high chemical resistance and its metal casing is IP66 rated. The instrument is also Ex certified up to Zone 0 inside pipes and Zone 1 outside, which makes it ideal for inline installations in explosive atmospheres.

With its auto-calibration functionality, low maintenance needs, and low lifetime costs, the MGP260 series offers an optimal way to monitor the entire biogas production process and continuously ensure its efficiency.

The MGP262 will be available during the first quarter of 2021.

Source: https://www.vaisala.com/en

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