scholarly journals Wood preservation (carbon sequestration) or wood burning (fossil-fuel substitution), which is better for mitigating climate change?

2013 ◽  
Vol 71 (2) ◽  
pp. 117-124 ◽  
Author(s):  
Philippe Leturcq
Keyword(s):  
Climate Change ◽  
Carbon Sequestration ◽  
Fossil Fuel ◽  
Wood Preservation ◽  
Wood Burning ◽  
Fuel Substitution

Refueling Satoyama Woodland Restoration in Japan: Enhancing Restoration Practice and Experiences through Woodfuel Utilization

2010 ◽  
Vol 5 (3) ◽  
pp. 251-276 ◽  
Author(s):  
Toru Terada ◽  
Makoto Yokohari ◽  
Jay Bolthouse ◽  
Nobuhiko Tanaka
Keyword(s):  
Climate Change ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Volunteer Management ◽  
Focal Points ◽  
Wood Fuel ◽  
Fuel Substitution ◽  
Restoration Practice ◽  
Woodland Restoration

Urban and peri-urban satoyama woodlands have become focal points of restoration throughout Japan. Prior to the abrupt shift to fossil fuels in the 1950-60s, villages coppiced these woods to produce a sustainable supply of wood fuel, a process that also sustained a dynamic woodland structure rich in biodiversity. Currently, amidst a “satoyama renaissance,” thousands of volunteer groups are restoring management to abandoned woods. Yet while volunteers are the main drivers of the satoyama renaissance, volunteer management tends to be limited in spatial extent and focused on the “parkification” of woodlands. Through a case study of four satoyama restoration scenarios we found that reintroduction of coppicing for wood fuel—“refueling”—can play a role in addressing climate change through fossil fuel substitution. We suggest that this literal refueling of satoyama restoration could, in a more metaphorical sense, help to refuel restoration efforts by strengthening both restoration practice and the authenticity of restoration experiences.

Energetic comparison of some stump-removing methods

2014 ◽  
Vol 10 (1) ◽  
pp. 35-51
Author(s):  
I. Czupy
Keyword(s):  
Alternative Energy ◽  
Fossil Fuel ◽  
Alternating Current ◽  
Above Ground Biomass ◽  
Alternative Energy Sources ◽  
Wide Domain ◽  
Fuel Substitution ◽  
Unused Resource ◽  
Root Connection ◽  
Different Soils

Concerns about climate change and fossil fuel shortages are encouraging interest in stumps, as alternative energy sources. Stumps are an almost unused resource in the context of bio fuels. Stump harvesting signifies an intensification of forest management compared with conventional stem-only or above-ground biomass-only harvesting. There are many benefits of stump harvesting. These include: the production of wood fuel, fossil fuel substitution, and improved soil preparation.Removing tree trunks in Hungary has been going on according to the principle of stump extraction, which means stumps are removed by grabbing technology. Experiments have been carried out to reduce the extraction force. In the Great Hungarian Lowland, where large areas require the operation implementation, stump extraction is done by special, hydraulic driven baggers equipped with a special bucket. During operation of the equipment, we carried out measurements of the extraction force and the time requirement. The experiments are designed to carry out the measurements with different soils and different tree species. According to our proposal the suitable force and torque required to remove stumps can be significantly reduced if before the lifting the soil — root connection is loosened. One of the possible ways to implement this task is the use of vibration. Since relatively great vibration power and wide domain of frequency are necessary, therefore we prepared the loosening machinery elements of alternating-current hydraulics system. Based on constructions variants we created a tractor-mounted experimental alternating-current hydraulic stump-loosening machine. It was designed with the ability to produce horizontal vibration in order to loosen stumps.

Phase equilibria modeling of biorefinery-related systems: a systematic review

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Marcos L. Corazza ◽  
Julia Trancoso
Keyword(s):  
Phase Equilibria ◽  
Phase Behavior ◽  
Fossil Fuel ◽  
Process Conditions ◽  
Design And Optimization ◽  
Waste Reuse ◽  
Wide Range ◽  
Prisma Statement ◽  
Fuel Substitution ◽  
The Subject

Abstract The search for sustainable ideas has gained prominence in recent decades at all levels of society since it has become imperative an economic, social, and environmental development in an integrated manner. In this context, biorefineries are currently present as the technology that best covers all these parameters, as they add the benefits of waste reuse, energy cogeneration, and fossil fuel substitution. Thus, the study of the various applicable biological matrices and exploring the technical capabilities of these processes become highly attractive. Thermodynamic modeling acts in this scenario as a fundamental tool for phase behavior predictions in process modeling, design, and optimization. Thus, this work aimed to systematize, using the PRISMA statement for systematic reviews, the information published between 2010 and 2020 on phase equilibria modeling in systems related to biorefineries to organize what is already known about the subject. As a result, 236 papers were categorized in terms of the year, country, type of phase equilibria, and thermodynamic model used. Also, the phase behavior predictions of different thermodynamic models under the same process conditions were qualitatively compared, establishing PC-SAFT as the model that best represents the great diversity of interest systems for biorefineries in a wide range of conditions.

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