Henrik Romar

Activated carbon from hydrolysis lignin: Effect of activation method on carbon properties

Davide Bergna, Toni Varila, Henrik Romar, Ulla Lassi

This study presents the effects of different activation methods to produce activated carbon from the hydrolysis lignin. Pretreatment of the feedstock with common mineral acids (HCL, HNO3, and H3PO4), different steam rates for physical activation, and different chemical activating agents (ZnCl2, Na2CO3, …

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Microplastic removal from water and wastewater by carbon-supported materials

Virpi Siipola, Henrik Romar, Ulla M. Lassi

Contributors

Jacinta Alchouron, Mohammad Alherbawi, Deborah Aller, Y. Vindula Alwis et autres

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Carbons Formed in Methane Thermal and Thermocatalytic Decomposition Processes: Properties and Applications

Emmi Välimäki, Lasse Yli-Varo, Henrik Romar, Ulla M. Lassi

The hydrogen economy will play a key role in future energy systems. Several thermal and catalytic methods for hydrogen production have been presented. In this review, methane thermocatalytic and thermal decomposition into hydrogen gas and solid carbon are considered. These processes, known …

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Multiple heavy metal removal simultaneously by a biomass‐based porous carbon

Sari Tuomikoski, Hanna Runtti, Henrik Romar, Ulla M. Lassi et autres

Abstract Activated carbon from sawdust was produced with an environmentally friendly process involving single‐stage carbonization and activation with steam at 800°C. Production process is scalable because lignocellulosic biomass is ubiquitous worldwide as a waste or as a virgin material. Single‐stage production without …

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Lignin-based activated carbon-supported metal oxide catalysts in lactic acid production from glucose

Riikka Kupila, Katja Lappalainen, Tao Hu, Henrik Romar et autres

In this study, heterogeneous biomass-based activated carbon-supported metal oxide catalysts were prepared and tested for lactic acid production from glucose in aqueous solution. Activated carbons were produced from hydrolysis lignin by chemical (ZnCl2) or steam activation and modified with a nitric acid …

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Ibuprofen degradation using a Co-doped carbon matrix derived from peat as a peroxymonosulphate activator

Zhongfei Ren, Henrik Romar, Toni Varila, Xing Xu et autres

The wider presence of pharmaceuticals and personal care products in nature is a major cause for concern in society. Among pharmaceuticals, the anti-inflammatory drug ibuprofen has commonly been found in aquatic and soil environments. We produced a Co-doped carbon matrix (Co–P 850) …

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Heavy Metal Sorption by Sludge-Derived Biochar with Focus on Pb2+ Sorption Capacity at μg/L Concentrations

Ida Sylwan, Hanna Runtti, Lena Johansson Westholm, Henrik Romar et autres

Municipal wastewater management causes metal exposure to humans and the environment. Targeted metal removal is suggested to reduce metal loads during sludge reuse and release of effluent to receiving waters. Biochar is considered a low-cost sorbent with high sorption capacity for heavy …

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Conversion of furfural to 2-methylfuran over CuNi catalysts supported on biobased carbon foams

Toni Varila, Eveliina Mäkelä, Riikka Kupila, Henrik Romar et autres

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The use of calcined paper mill sludge as a chemical precipitant in the simultaneous removal of ammonium and phosphate - paper mill waste recycling and reuse

Pekka Myllymäki, Janne Pesonen, Henrik Romar, Tao Hu et autres

ABSTRACT Currently, recycling and re-use of materials is extremely important due to the diminishing of natural resources. The objective of the European Union’s circular economy strategy is to increase recycling and the use of industrial waste materials and side streams as secondary …

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Performances of metals modified activated carbons for fluoride removal from aqueous solutions

Soumia Bakhta, Zahra Sadaoui, Ulla M. Lassi, Henrik Romar et autres

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Effects of Pyrolysis Conditions and Feedstocks on the Properties and Gasification Reactivity of Charcoal from Woodchips

Aekjuthon Phounglamcheik, Liang Wang, Henrik Romar, Norbert Kienzl et autres

Abstract Pyrolysis conditions in charcoal production affect yields, properties, and further use of charcoal. Reactivity is a critical property when using charcoal as an alternative to fossil coal and coke, as fuel or reductant, in different industrial processes. This work aimed to …

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