An economic and energy analysis on bio-hydrogen fuel using a gasification process

Dowaki, Kiyoshi; Ohta, Tsuyoshi; Kasahara, Yasukazu; Kameyama, Mitsuo; Sakawaki, Koji; Mori, Shunsuke

doi:10.1016/j.renene.2005.12.010

Cited by 40 publications

(24 citation statements)

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“…It was suggested that environmental impact could be reduced by elevated CO 2 treatment due to the growth increase, assuming that CO 2 emission to produce waste CO 2 could be ignored. It is recommended to combine a protected horticulture system with the Blue Tower process [40,41]. The Blue Tower process is a renewable energy production systems which uses biomass, and its main product is hydrogen.…”

Section: Discussionmentioning

confidence: 99%

Environmental Impact and Nutritional Improvement of Elevated CO2 Treatment: A Case Study of Spinach Production

et al. 2017

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Abstract:The agriculture sector is known to be the one of the major contributors to global greenhouse gas (GHG) emissions. At the same time, global climate changes have affected the agriculture sector. In order to strengthen the sustainable development of agriculture, it is important to promote environmentally friendly farming and simultaneously increase the economic value. To improve the productivity of agriculture, technical advancements have occurred. Among those, we have focused on CO 2 treatment in cultivation. We aimed to clarify the effectiveness of the elevated CO 2 treatment of spinach based on GHG emission and the economic value using the eco-efficiency score. We assumed that nutrition could represent the value of the vegetable. We measured weights, vitamin C, and CO 2 emissions of elevated CO 2 treatment and conventional production. We used life cycle assessment (LCA) to estimate CO 2 emissions. CO 2 emissions of a 100-g bouquet of spinach were estimated from agricultural inputs, farming, transport, and distribution center processes at a model spinach farm in Japan. CO 2 emission of elevated CO 2 treatment was 29.0 g-CO 2 , and was 49.0 g-CO 2 for conventional production. The net weight of a bouquet of elevated CO 2 -treated spinach was 1.69-fold greater than that of conventional production. Vitamin C per 100 g spinach produced via elevated CO 2 treatment was 15.1 mg, and that of conventional production was 13.5 mg on average. Finally, based on the above results, we assessed the eco-efficiency scores of the elevated CO 2 treatment and conventional production of spinach, enabling integration of the nutritional value and the environmental impact. The score showed that elevated CO 2 treatment (0.76) was 2.9-fold more efficient than conventional production (0.26). This study suggested that elevated CO 2 treatment could enhance growth and nutritional value of spinach, and further contribute to CO 2 reduction.

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Section: Discussionmentioning

confidence: 99%

Environmental Impact and Nutritional Improvement of Elevated CO2 Treatment: A Case Study of Spinach Production

et al. 2017

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“…comparing our calculation to the demo-plant data. Assuming that the materials chopped at the size of 20-30 mm are fed into the reactor, H 2 of 54.4 vol.% and CO of 24.4 vol.% were generated at 950ºC and Steam/Carbon=1.0 due to our simulator (Dowaki et al, 2007). On the other hand, we executed the studies in order to confirm the absolute proof of the chemical equilibrium reactions, and/or the heat balance in use of the experimental apparatus and/or the demoplant (1t/d scale) at Izumo, shimane prefecture in Japan.…”

Section: Blue Tower Technologymentioning

confidence: 99%

“…That is, it would be extremely significant to identify the deviation from the viewpoint of the reliable plant operation. The calculation logic of the simulator which we developed is as follows (Dowaki et al 2007): 1. The reaction temperature in each furnace (pyrolyzer and reformer) and the steam feeding rate are fixed.…”

Section: Bt Process Simulator Due To the Basic Experimentsmentioning

confidence: 99%

Energy Paths due to Blue Tower Process

Dowaki¹

2011

Biofuel's Engineering Process Technology

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“…Many people already have an interest in biomass use, in which it has the properties of being a biomass source and a carbon neutral source [3].…”

Section: Introductionmentioning

confidence: 99%

Overview Effect of Biodiesel Storage on Properties and Characteristics

Zakaria

Khalid

Sies

et al. 2013

AMM

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Abstract. Biofuels based on vegetable oils offer the advantage being a sustainable and environmentally attractive alternative to conventional petroleum based fuel. The key issue in using vegetable oil-based fuels is oxidation stability, stoichiometric point, bio-fuel composition, antioxidants on the degradation and much oxygen with comparing to diesel gas oil. This provides a critical review of current understanding of main factor in storage method which affecting the biodiesel properties and characteristics. In the quest for fulfill the industry specifications standard; the fuel should be stored i n a clean, dry and dark environment. Water and sediment contamination are basically housekeeping issues for biodiesel. Degradation by oxidation yields products that may compromise fuel properties, impair fuel quality and engine performance. The effect of storage method on the fuel properties and burning process in biodiesel fuel combustion will strongly affects the exhaust emissions. IntroductionBurning fossil fuels such as coal, diesel and gas produces greenhouse gases give impacts on the environment. A range of greenhouse gases were produced when fossil fuels are burned, these gases include carbon dioxide, water vapour, methane and nitrous oxides. These gases trap the sun's heat in the atmosphere, it concentrate and increase the heat of the sun where it works quite similar to the lens in a magnifying glass. This is called the greenhouse effect.Studies have found that first-generation biofuels produced from current feedstock's using the most efficient systems and carbon releases results in emission reductions in the range of 20-60 per cent relative to fossil fuels. Generally, biofuels offer many priorities, including sustainability, reduction of greenhouse gas emissions, regional development, social structure and agriculture and securi-

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An economic and energy analysis on bio-hydrogen fuel using a gasification process

Cited by 40 publications

References 3 publications

Environmental Impact and Nutritional Improvement of Elevated CO2 Treatment: A Case Study of Spinach Production

Environmental Impact and Nutritional Improvement of Elevated CO2 Treatment: A Case Study of Spinach Production

Energy Paths due to Blue Tower Process

Overview Effect of Biodiesel Storage on Properties and Characteristics

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