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Issue 209 September 2022 - LNG Issue

gasworld US Edition, Vol 60, No 10 (October) - Digitzation & Distributors

By Anthony Wright 2022-09-15T11:49:00+01:00

Chemical company Asahi Kasei is to construct a biogas purification system at a sewage treatment plant in Kurashiki City, Okayama, Japan, which can separate and recover CO2 and methane emissions.

During a trial held today, 15th September, Asahi Kasei showcased the system, which uses its K-GIS zeolite adsorbent to selectively adsorb CO2 from biogas released from sewage. 

According to the company, K-GIS differs from conventional adsorbents by adsorbing almost no methane, enabling the system to efficiently separate and recover high-purity methane while recovering high-purity CO2. 

Consisting of around 60% methane and 40% CO2, waste-derived biogas can be used in its upgraded form – biomethane – as a substitute to natural gas. 

The importance of biogas as a natural gas alternative has been emphasised by UK-based Anaerobic Digestion and Biogas Association (ADBA) , which recently called for the country to increase investment into waste-derived biogas as a response to the ongoing Russian gas crisis, which has sent EU countries scampering for energy alternatives.

According to ADBA Chairman Chris Huhne, the EU plans to double biogas output to meet 9% of last year’s gas demand.

“By contrast, in the UK, current government plans would meet less than 1% of our 2021 consumption,” he said. 

The adoption of biogas and biomethane could also help meet or bring forward ambitious net zero targets. 

By combining biomethane producing using their system with carbon capture and utilisation and storage (CCUS), Asahi Kasei revealed that it could create a carbon negative cycle. 

In the demonstration trial, the separated gases are recombined to biogas as fuel for generating electricity. 

To be installed in May next year, the partners aim to begin operations at the end of 2023. Following additional trials, the Asahi Kasei intends to commercialise its purification system by 2025 or 2026.

Leading anaerobic digestion (AD) trade body the Anaerobic Digestion and Biogas Association (ADBA) has published an open letter to the new UK government emphasising the importance of biogas to address the country’s current energy and climate crises.

Clarke Energy is to supply Peaks Renewables - a subsidiary of Summit Utilities - with a natural gas fired combined heat and power (CHP) system.

A bio-liquefied natural gas (LNG) plant is to be built near the Germany city of Fulda, potentially saving up to 550,000 tonnes of CO2 per year.

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