Christian Wever
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Christian Wever has a total of 16 co-authors. Here are the top co-authors by number of shared publications:
- Ralf Pude
Universität Bonn
5 shared publications - Lüders Moll
Universität Bonn
2 shared publications - Martin Höller
INRES–Renewable Resources, Campus Klein-Altendorf, University of Bonn, Klein-Altendorf 2, D-53359 Rheinbach, Germany
2 shared publications Alexander L. Deutschle
Metsä Tissue GmbH, Hedwigsthal, 56316, Raubach, Germany
1 shared publicationAlexander Stücker
Metsä Tissue GmbH, Hedwigsthal, 56316, Raubach, Germany
1 shared publication- Anne Lunze
Enzyme Process Technology (AVT.EPT), RWTH Aachen University, Forckenbeckstr. 51, 52074, Aachen, Germany
1 shared publication
Latest Publications
- Open Access
Cup Plant (Silphium perfoliatum L.) Biomass as Substitute for Expanded Polystyrene in Bonded Leveling Compounds
Biomass for non-food applications is considered as a substitute for petro-based materials such as expanded polystyrene (EPS). This research analyzes physical properties of an EPS containing commercial bonded leveling compound (BLC) which was substituted with cup plant (Silphium perfoliatum L.) biomass. Cup plant is a high-yielding biomass plant with several ecological benefits that is yet mainly used for biogas production. Furthermore, the high amount of parenchyma in senescent biomass with its EPS-like structure could be a possible substitute for petrochemical foams in lightweight aggregates. The natural variation in parenchyma content of several European cup plant accessions is promising, regarding the development of cultivars with suitable biomass properties for the proposed material use. Two binders with different proportions of cup plant and EPS were used to produce samples of BLC for thermal conductivity and compression strength tests. The compression strength of 0.92 N mm−2 and a thermal conductivity of 84 mW m−1 K−1 were analyzed and comparable to the commercial BLC. The thermal conductivity within the tested borders appears nearly independent of the biomass content. With increasing cup plant content, the shape characteristics of the lightweight aggregate mix changes towards more elongated aggregates. The mechanical strength and thermal conductivity are highly sensitive to the water demand of the biomass. Direct partial substitution of EPS by cup plant appears feasible and could be a part of the decarbonization of the construction sector.
Open AccessCup Plant (Silphium perfoliatum L.) Biomass as Substitute for Expanded Polystyrene in Bonded Leveling Compounds
Biomass for non-food applications is considered as a substitute for petro-based materials such as expanded polystyrene (EPS). This research analyzes physical properties of an EPS containing commercial bonded leveling compound (BLC) which was substituted with cup plant (Silphium perfoliatum L.) biomass. Cup plant is a high-yielding biomass plant with several ecological benefits that is yet mainly used for biogas production. Furthermore, the high amount of parenchyma in senescent biomass with its EPS-like structure could be a possible substitute for petrochemical foams in lightweight aggregates. The natural variation in parenchyma content of several European cup plant accessions is promising, regarding the development of cultivars with suitable biomass properties for the proposed material use. Two binders with different proportions of cup plant and EPS were used to produce samples of BLC for thermal conductivity and compression strength tests. The compression strength of 0.92 N mm−2 and a thermal conductivity of 84 mW m−1 K−1 were analyzed and comparable to the commercial BLC. The thermal conductivity within the tested borders appears nearly independent of the biomass content. With increasing cup plant content, the shape characteristics of the lightweight aggregate mix changes towards more elongated aggregates. The mechanical strength and thermal conductivity are highly sensitive to the water demand of the biomass. Direct partial substitution of EPS by cup plant appears feasible and could be a part of the decarbonization of the construction sector.
- 1 September 2021
- Published by Elsevier in Industrial Crops and Products
- Vol. 167, 113548
Meadow hay, Sida hermaphrodita (L.) Rusby and Silphium perfoliatum L. as potential non-wood raw materials for the pulp and paper industry
- 1 September 2021
- Published by Elsevier in Industrial Crops and Products
- Vol. 167, 113548
Meadow hay, Sida hermaphrodita (L.) Rusby and Silphium perfoliatum L. as potential non-wood raw materials for the pulp and paper industry
- Open Access
Third-Generation Biomass Crops in the New Era of De Novo Domestication
The emerging bioeconomy will increase the need for plant biomass. We call for a third-generation of bioenergy crops, or biomass crops, to help move society towards a sustainable bioeconomy and global food security. Third-generation biomass crops should be capable of producing both food and raw materials. Such flexibility would allow farmers to respond to global markets and buffer global food security. At the same time, third-generation biomass crops need to increase the sustainability of agriculture. To reach such ambitious goals, new biomass crops have to develop de novo from promising perennial wild species.
Open AccessThird-Generation Biomass Crops in the New Era of De Novo Domestication
The emerging bioeconomy will increase the need for plant biomass. We call for a third-generation of bioenergy crops, or biomass crops, to help move society towards a sustainable bioeconomy and global food security. Third-generation biomass crops should be capable of producing both food and raw materials. Such flexibility would allow farmers to respond to global markets and buffer global food security. At the same time, third-generation biomass crops need to increase the sustainability of agriculture. To reach such ambitious goals, new biomass crops have to develop de novo from promising perennial wild species.
- Open Access
Increase of Miscanthus Cultivation with New Roles in Materials Production—A Review
Recent changes in the EU green aims can help to overcome economic obstacles in the slow upscaling of Miscanthus cultivation. Using Miscanthus can permanently fix CO within building materials thereby aiding the EU climate goals with the increased use of regrowing materials, as well as carbon fixation. Economic obstacles in the slow upscaling of Miscanthus cultivation are targeted by recent changes in the greening aims in the EU. Miscanthus can fulfill a valuable dual function in aiding the EU climate goals by achieving permanent CO fixation within building materials. In contrast to energetic use, persistent applications create stable markets allowing for a reduced risk in the establishment of long term cultured perennial crops. However, the development of different building materials requires an understanding of the combination of the biological and technical aspects. This work presents an overview of the development of the general aspects for the agricultural product Miscanthus and the scientifically reported developments of Miscanthus used as feedstock in polymers, particle boards, and cementitious materials. While the product performance can be evaluated, the understanding of the influence by the input biomass as a main contributor to the product performance needs to be reinforced to be successful with a goal-oriented development of Miscanthus based products. The key feedstock parameters governing the technical performance of the materials are identified and the knowledge gaps are described.Open AccessIncrease of Miscanthus Cultivation with New Roles in Materials Production—A Review
Recent changes in the EU green aims can help to overcome economic obstacles in the slow upscaling of Miscanthus cultivation. Using Miscanthus can permanently fix CO within building materials thereby aiding the EU climate goals with the increased use of regrowing materials, as well as carbon fixation. Economic obstacles in the slow upscaling of Miscanthus cultivation are targeted by recent changes in the greening aims in the EU. Miscanthus can fulfill a valuable dual function in aiding the EU climate goals by achieving permanent CO fixation within building materials. In contrast to energetic use, persistent applications create stable markets allowing for a reduced risk in the establishment of long term cultured perennial crops. However, the development of different building materials requires an understanding of the combination of the biological and technical aspects. This work presents an overview of the development of the general aspects for the agricultural product Miscanthus and the scientifically reported developments of Miscanthus used as feedstock in polymers, particle boards, and cementitious materials. While the product performance can be evaluated, the understanding of the influence by the input biomass as a main contributor to the product performance needs to be reinforced to be successful with a goal-oriented development of Miscanthus based products. The key feedstock parameters governing the technical performance of the materials are identified and the knowledge gaps are described.