Select Page

Biogas Engine Maintenance and Siloxane Challenges

by | Jul 8, 2024 | INSIGHT

This case study explores the premature failure of precombustion chambers in biogas engines and offers insights into the underlying causes and potential solutions.

Introduction

Biogas engines play a crucial role in the renewable energy sector, converting biogas into usable energy. However, these engines often face significant challenges, particularly with the presence of siloxanes in the biogas. This case study explores the premature failure of precombustion chambers in biogas engines and offers insights into the underlying causes and potential solutions.

Background

During a recent visit to a customer’s power plant, a significant issue was identified: the premature clogging of the breather hole in the precombustion chamber. However this failure is not typical and warrants a thorough root-cause analysis. Moreover, biogas, produced from landfills, methanation plants, and wastewater treatment plants (WWTP), is a complex mixture of gases, including harmful components like siloxanes, which are particularly problematic.

Types of Biogas and Their Composition

  • Uncontrolled Systems:
    Such as landfill or marshland sources.
  • Controlled Systems:
    Including municipal wastewater treatment plants (WWTP) and anaerobic digestion plants with high organic loads.

    Controlled systems are generally noted for higher concentrations of H2S and siloxanes, while uncontrolled systems also contain siloxanes and high molecular weight hydrocarbons.

Impact of Siloxanes on Biogas Engines

  • Increased Maintenance Costs:
    Frequent maintenance and unexpected downtime for cleaning and repairs. Siloxane buildup necessitates more frequent maintenance intervals and can result in unexpected downtime for cleaning and repairs. This increases operational costs for biogas facilities. Unlike sulfides, silicones do not react with water to form acids. However, during combustion, the siloxane molecules are broken down and release oxygen and silicon.
  • Reduced Engine Efficiency:
    As siloxane deposits accumulate on engine components, they interfere with combustion processes and heat transfer, reducing engine efficiency. To sum up, this can lead to decreased power output and increased fuel consumption.
  • Higher Emissions:
    Furthermore, siloxane combustion can produce silicon dioxide particles, which may not be completely captured by engine emission control systems. Likewise, these particles can be released into the atmosphere, contributing to air pollution.
  • Engine Damage: Severe siloxane contamination can lead to premature engine failure due to increased wear on critical components. In this case, this necessitates costly repairs or engine replacements.

Strategies for Mitigating Siloxane Impact

To address the issues caused by siloxanes, several strategies can be employed:

Conclusion

Managing siloxane contamination is essential for maintaining the reliability, efficiency, and longevity of biogas engines. By implementing effective pre-treatment, regular maintenance, optimized engine designs, and continuous monitoring, biogas facilities can mitigate the adverse effects of siloxanes, ensuring smoother operation and reduced costs.

Read more

Learn the latest Injegov News, including information on our company’s latest investments, innovations and corporate social responsibility acts.

Jul 12 2024

Jenbacher 420 misfire troubleshooting

Explore our case study on solving misfire issues in the Jenbacher 420 biogas engine, emphasizing preventive...
Jul 04 2024

INJEGOV Attends PowerUP’s “Shaping The Future” Sales Conference

INJEGOV SA, the go-to distributor of PowerUP spare parts in Greece, proudly took part in the exciting “Shaping...
Jun 21 2024

POSIDONIA 2024 highlights

INJEGOV’s participation, achievements, and experience summary during the Posidonia 2024 week.
Apr 23 2024

A Cyprus Technical High School’s Visit to INJEGOV Mechanical Workshop

A group of technical high school students from Cyprus visited our mechanical workshop in Piraeus. The visit was...
Apr 22 2024

BOSCH visit at INJEGOV mechanical workshop in Greece

It is with great pleasure that we announce the visit of our BOSCH partners to renew our contract agreement as a BOSCH...
Apr 05 2024

ISO Certification renewal for our workshop in Tuzla

We are pleased to announce that our workshop in Tuzla, Turkey, has earned a three-year ISO certificate for conformance...
Apr 02 2024

7 truths about independently sourced spare parts and service

Why is working with independently sourced spare and services beneficial? Read the following article written by EMISA...
Mar 12 2024

INJEGOV at Mediterranean Yacht Show

INJEGOV SA will exhibit at the 9th Mediterranean Yacht Show, organized by the Greek Yachting Association at Nafplion,...
YANMAR NZ61 GOVERNOR FEATURE IMAGE
Feb 14 2024

YANMAR NZ61 governor

YANMAR, a leading name in engine technology, provides governors specifically designed for large engines, ensuring...
Vibration dampers INSIGHT feature image
Jan 31 2024

Vibration dampers

The periodic combustion cycles of 2-stroke and 4-stroke engines create torque fluctuations that cause torsional...
My Inquiry
Your inquiry is empty.

Have not found what you looking for? Contact us at technical@injegov.gr.