The temporal imbalance between the release and sequestration of forest carbon has raised a fundamental concern about the climate mitigation potential of forest biomass for energy. The potential carbon debt caused by harvest and the resulting time spans needed to reach pre-harvest carbon levels (payback) or those of a reference case (parity) have become important parameters for climate and bioenergy policy developments. The present range of analyses however varies in assumptions, regional scopes, and conclusions. Comparing these modeling efforts, we reveal that they apply different principle modeling frameworks while results are largely affected by the same parameters. The size of the carbon debt is mostly determined by the type and amount of biomass harvested and whether land-use change emissions need to be accounted for. Payback times are mainly determined by plant growth rates, i.e. the for- est biome, tree species, site productivity and management. Parity times are primarily influenced by the choice and construction of the reference scenario and fossil carbon displacement effi- ciencies. Using small residual biomass (harvesting/processing), deadwood from highly insect- infected sites, or new plantations on highly productive or marginal land offers (almost) immediate net carbon benefits. Their eventual climate mitigation potential however is determined by the effectiveness of the fossil fuel displacement. We deem it therefore unsuitable to define politi- cal guidance by feedstock alone. Current global wood pellet production is predominantly resi- due based. Production increases based on low-grade stemwood are expected in regions with a downturn in the local wood product sector, highlighting the importance of accounting for regional forest carbon trends. © 2013 Society of Chemical Industry and John Wiley & Sons, Ltd

The ‘debt’ is in the detail: A synthesis of recent temporal forest carbon analyses on woody biomass for energy

Biomass for industrial applications: The role of torrefaction

Fitting performance of artificial neural networks and empirical correlations to estimate higher heating values of biomass

Biomass, which its conversion into greener bio-based products, is able to achieve a more balanced carbon cycle through circular utilisation. The development of biomass industry, therefore, appears to be one priority area and is an important step to motivate the global circular economy and sustainability. However, due to the existence of commercialisation barriers, the biomass industry in developing country, such as Malaysia, is not on par with the increment of the country's gross domestic product. This paper overviews the barriers of development and challenges encountered by the biomass industry in Malaysia. Challenges are classified into four barrier categories, i.e., (i) technical barrier, (ii) financial barrier, (iii) social awareness barrier and (iv) misunderstanding and gaps between stakeholders. Based on the barriers identified, recommendations which embrace the areas of technology innovation, logistics management, interaction between academia and industry, policy and enforcement, social impact and international benchmarking, are proposed. These recommendations can act as good references for the development of biomass industry in Malaysia and reflection for other developing countries with biomass resources in the promotion of sustainability and commercialisation of biomass products. The role of the five key stakeholders in commercialising the biomass technologies are highlighted in this review.

An outlook of Malaysian biomass industry commercialisation: Perspectives and challenges

Co-combustion of biomass-based fuels and fossil fuels in power plant boilers, utility boilers, and process furnaces is a widely acknowledged means of efficient heat and power production, offering higher power production than comparable systems with sole biomass combustion. This, in combination with CO2 and other greenhouse gases abatement and low specific cost of system retrofit to co-combustion, counts among the tangible advantages of co-combustion application. Technical and operational issues regarding the accelerated fouling, slagging, and corrosion risk, as well as optimal combustion air distribution impact on produced greenhouse gases emissions and ash properties, belong to intensely researched topics nowadays in parallel with the combustion aggregates design optimization, the advanced feed pretreatment techniques, and the co-combustion life cycle assessment. This review addresses the said topics in a systematic manner, starting with feed availability, its pretreatment, fuel properties and combustor types, followed by operational issues, greenhouse gases, and other harmful emissions trends, as well as ash properties and utilization. The body of relevant literature sources is table-wise classified according to numerous criteria pertaining to individual paper sections, providing a concise and complex insight into the research methods, analyzed systems, and obtained results. Recent advances achieved in individual studies and the discovered synergies between co-combusted fuels types and their shares in blended fuel are summed up and discussed. Actual research challenges and prospects are briefly touched on as well.

Advances in Biomass Co-Combustion with Fossil Fuels in the European Context: A Review

EUBIONET III: Solutions to biomass trade and market barriers

Solutions for biomass fuel market barriers and raw material availability: Summary of the EUBIONET III project results - Result oriented report

Unexploited biomass sources, availability and combustion properties: D5.1

The EUBIONET III project has boosted (i) sustainable, transparent international biomass fuel trade, (ii) investments in best practice technologies and (iii) new services on biomass heat sector. Furthermore, it identified cost-efficient and value-adding use of biomass for energy and industry. The aims of this article are to provide a synthesis of the key results of this project. Estimated annual solid biomass potential in the EU-27 is almost 6600 PJ (157 Mtoe), of which 48% is currently utilised. The greatest potential for increased use lies in forest residues and herbaceous biomass. Trade barriers have been evaluated and some solutions suggested such as CN codes for wood pellets and price indexes for industrial wood pellets and wood chips. The analysis of wood pellet and wood chip prices revealed large difference amongst EU countries, but also that on the short term prices of woody and fossil fuels are barely correlated. Sustainable production and use of solid biomass are also deemed important by most European stakeholders, and many support the introduction of harmonised sustainability criteria, albeit under a number of preconditions. The study identified also that a number of woody and agro-industrial residue streams remain un- or underutilised. The estimated European total potential of agro-industrial sources is more than 250 PJ (7.2 Mtoe), the amount of unutilised woody biomass (the annual increment of growing stock) even amounts to 3150 PJ (75 Mtoe). Finally 35 case studies of biomass heating substituting fossil fuels were carried out, showing that the potential to reduce GHG emissions ranges between 90 and 98%, while costs are very similar to fossil fuel heating systems. Overall, we conclude that solid biomass is growing strongly, and is likely to heavily contribute to the EU renewable energy targets in the coming decade.

EUBIONET III - Solutions to biomass trade and market barriers

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EUBIONET III: Solutions to biomass trade and market barriers

Solutions for biomass fuel market barriers and raw material availability: Summary of the EUBIONET III project results - Result oriented report

Unexploited biomass sources, availability and combustion properties: D5.1

EUBIONET III - Solutions to biomass trade and market barriers