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Home NEWS Science News Technology

Transforming Palm Waste into High-Performance CO₂ Absorbers: Malaysian Scientists Innovate with Agricultural Byproducts

Bioengineer by Bioengineer
October 3, 2025
in Technology
Reading Time: 4 mins read
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Transforming Palm Waste into High-Performance CO₂ Absorbers: Malaysian Scientists Innovate with Agricultural Byproducts
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In Malaysia, a country known for its substantial palm oil production, an environmental crisis looms due to the overwhelming generation of agricultural waste, notably oil palm ash (OPA). This waste has long posed a disposal challenge but recent advancements may signal a transformative shift. Researchers at Universiti Sains Malaysia (USM) have unveiled a groundbreaking approach that repurposes this byproduct into an innovative adsorbent that captures carbon dioxide (CO₂) from the atmosphere. This bold initiative, documented in a study published recently, harnesses cutting-edge techniques including machine learning, marking a significant leap towards sustainable carbon capture technologies.

The research team, spearheaded by Dr. Azam Taufik Mohd Din from the School of Chemical Engineering, embarked on a mission to convert raw oil palm ash into a functionalized material capable of effectively capturing CO₂. This endeavor involved a meticulous process of treating the raw ash using acidic solutions, followed by carbonization and activation with potassium hydroxide (KOH). The resulting product, termed OPA-KOH(1:2), exhibits a uniquely engineered mesoporous structure designed to enhance the adsorption of CO₂, demonstrating an innovative means of tackling the dual challenges of waste disposal and carbon accumulation in the atmosphere.

In terms of performance metrics, the adsorbent displays a noteworthy adsorption capacity of 2.9 millimoles per gram, which is particularly impressive considering its modest surface area of 30.95 square meters per gram. Contrary to conventional wisdom, which often equates higher surface area with improved performance, this study illustrates the importance of pore structure in adsorbent efficacy. The carefully designed pores allow CO₂ molecules to enter rapidly and adhere effectively—not just a feat of engineering, but a leap in the science of materials design.

The mechanisms behind CO₂ capture by OPA-KOH(1:2) hinge on an intriguing interplay of physical and chemical interactions. The primary adsorption process is characterized as exothermic and spontaneous, primarily relying on physisorption—where CO₂ adheres to the material’s surface through weak physical forces. This is complemented by minor contributions from chemisorption, enhancing the overall stability and effectiveness of the material. Such a dual mechanism signifies not only a scientific triumph but potential applicability in real-world carbon capture, utilization, and storage (CCUS) systems that are urgently needed as global emissions targets become increasingly stringent.

What distinguishes this research is the pioneering application of machine learning in predicting the performance of the new adsorbent. In a notable application of artificial intelligence, the research team utilized advanced machine learning algorithms to simulate and forecast CO₂ adsorption behavior. A bilayered neural network was particularly successful, achieving a remarkable R² value exceeding 0.99, indicating an almost flawless predictive capability. Dr. Mohd Din articulated the significance of this approach, positing that machine learning is not just a fleeting trend but a vital tool that can expedite research processes, optimizing the design and application of new materials.

The implications of this work extend far beyond local waste management; they present a compelling template for a circular economy. Malaysia, producing in excess of 20 million tons of palm oil annually, generates vast quantities of agricultural residue. The ability to convert oil palm ash into a viable carbon-capture medium not only addresses the waste disposal issue but also proposes a method of creating renewable resources that mitigate greenhouse gas emissions. This development underlines the notion that sustainability and performance can coexist, as reflected in Dr. Mohd Din’s assertion that carbon-neutral solutions need not sacrifice effectiveness for environmental benefits.

The innovative approach taken by the research team at Universiti Sains Malaysia reflects the institution’s emergence as an authority in clean energy and environmental technology. The School of Chemical Engineering, situated in Nibong Tebal, Penang, is carving a niche as a pioneering hub for technological innovation, particularly in the realms of waste valorization and carbon management. Dr. Mohd Din’s leadership elucidates how localized innovations, informed by global scientific paradigms, can coalesce to address pressing planetary issues.

Looking ahead, the success of OPA-KOH(1:2) heralds potential advancements in large-scale applications, including pilot testing in industrial contexts like flue gas treatment and direct air capture systems. Future research endeavors will not only assess the material’s regeneration cycles and long-term stability but will further explore how it can be seamlessly incorporated into existing industrial processes, thereby enhancing the operational efficiencies of carbon capture systems. As climate goals tighten globally, the need for scalable and cost-effective technologies to capture and utilize carbon dioxide becomes increasingly paramount.

The remarkable achievement of converting biomass waste into an efficient adsorbent is a testament to the ingenuity embedded in modern materials science, enriched by advancements in computational intelligence. OPA-KOH(1:2) exemplifies how innovations in chemistry and engineering can coalesce to form solutions capable of addressing today’s most daunting environmental challenges. This research not only contributes to the ongoing fight against climate change, it also redefines our understanding of waste, viewing it instead as a resource waiting to be transformed into a powerful ally in our quest for sustainability.

In conclusion, the strides made by the team at Universiti Sains Malaysia in enhancing CO₂ capture through innovative use of oil palm ash underscore the vital intersection of science, technology, and sustainability. The promising results fuel optimism for a future where industrial practices harmonize more effectively with ecological stewardship, fostering a more sustainable environment. The journey does not end here; rather, it is a prologue to further exploration, innovation, and application of these technologies in a world increasingly aware of its environmental responsibilities.

Subject of Research: Oil palm ash as a sustainable adsorbent for carbon capture
Article Title: Enhanced CO2 capture using KOH-functionalized oil palm ash adsorbent: experimental and applied machine learning approach
News Publication Date: August 18, 2025
Web References: https://link.springer.com/journal/44246
References: Mohamed Saleh, S.N., Rohman, F.S., Muhammad, D. et al. Enhanced CO2 capture using KOH-functionalized oil palm ash adsorbent: experimental and applied machine learning approach. Carbon Res. 4, 60 (2025).
Image Credits: Credit: Syamima Nasrin Mohamed Saleh, Fakhrony Sholahudin Rohman, Dinie Muhammad, Syafini Mohd Hussin, Bassim H. Hameed, Chew Thiam Leng & Azam Taufik Mohd Din

Keywords

Carbon dioxide adsorption; Oil palm ash-based adsorbent; KOH activation; Machine learning; Bilayered neural network model

Tags: agricultural byproducts innovationcarbon capture advancementscarbon dioxide adsorbentsCO2 capture technologiesfunctionalized materials for CO₂machine learning in researchmesoporous structure designoil palm ash utilizationpalm oil waste managementsustainable environmental solutionsUniversiti Sains Malaysia studieswaste-to-resource initiatives

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