Matching Items (10)
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- All Subjects: energy
- Creators: School of Sustainability
Description
Currently, approximately 40% of the world’s electricity is generated from coal and coal power plants are one of the major sources of greenhouse gases accounting for a third of all CO2 emissions. The Integrated Gasification Combined Cycle (IGCC) has been shown to provide an increase in plant efficiency compared to traditional coal-based power generation processes resulting in a reduction of greenhouse gas emissions. The goal of this project was to analyze the performance of a new SNDC ceramic-carbonate dual-phase membrane for CO2 separation. The chemical formula for the SNDC-carbonate membrane was Sm0.075Nd0.075Ce0.85O1.925. This project also focused on the use of this membrane for pre-combustion CO2 capture coupled with a water gas shift (WGS) reaction for a 1000 MW power plant. The addition of this membrane to the traditional IGCC process provides a purer H2 stream for combustion in the gas turbine and results in lower operating costs and increased efficiencies for the plant. At 900 °C the CO2 flux and permeance of the SNDC-carbonate membrane were 0.65 mL/cm2•min and 1.0×10-7 mol/m2•s•Pa, respectively. Detailed in this report are the following: background regarding CO2 separation membranes and IGCC power plants, SNDC tubular membrane preparation and characterization, IGCC with membrane reactor plant design, process heat and mass balance, and plant cost estimations.
ContributorsDunteman, Nicholas Powell (Author) / Lin, Jerry (Thesis director) / Dong, Xueliang (Committee member) / Barrett, The Honors College (Contributor) / Chemical Engineering Program (Contributor) / School of Sustainability (Contributor)
Created2014-05
Description
There are three known materials that readily undergo fission, allowing their use as a base for nuclear fuel: uranium-235, a naturally-occurring but uncommon isotope; plutonium, created from irradiated natural uranium; and uranium-233, produced from thorium. Of the three, uranium-235 and plutonium feature heavily in the modern nuclear industry, while uranium-233 and the thorium fuel cycle have failed to have significant presence in the field. Historically, nuclear energy development in the United States, and thorium development in particular, has been tied to the predominant societal outlook on the field, and thorium was only pursued seriously as an option during a period when nuclear energy was heavily favored, and resources seemed scarce. Recently, thorium-based energy has been experiencing a revival in interest in response to pollution concerns regarding fossil fuels. While public opinion is still wary of uranium, thorium-based designs could reduce reliance on fossil fuels while avoiding traditional drawbacks of nuclear energy. The thorium fuel cycle is more protected against proliferation, but is also much more expensive than the uranium-plutonium cycle in a typical reactor setup. Liquid-fueled molten salt reactor designs, however, bypass the prohibitive expense of U-233 refabrication by avoiding the stage entirely, keeping the chain reaction running with nothing but thorium input required. MSRs can use any fissile material as fuel, and are relatively safe to operate, due to passive features inherent to the design.
ContributorsGalbiati, Joseph Nicco (Author) / Martin, Thomas (Thesis director) / Foy, Joseph (Committee member) / Barrett, The Honors College (Contributor) / School of Sustainability (Contributor)
Created2014-05
Description
This paper seeks to analyze the relationship between energy subsidies on fossil fuels by countries and corresponding energy consumption, specifically electricity, by its citizens and occupants. The purpose of this was to determine whether pre-tax subsidies and post-tax subsidies have an effect on that consumption. This paper will discuss the prospect of accounting for post-tax subsidies as a method to curb rampant energy consumption throughout the world, with the focus being on residential electricity use. The two case studies, the Netherlands and Saudi Arabia, will illustrate the consumption patterns in relatively similar economic societies with different subsidy policies. Saudi Arabia will be a high pre-tax subsidy example while the Netherlands will be shown to account for some of the post-tax subsidies through an externality tax system. At the end of this analysis, this paper will show that the heavy subsidization of electricity production is strongly correlated to residential electricity consumption at levels that many officials would deem unsustainable, and that as such, subsidy reform is both beneficial and necessary.
ContributorsCorona, Kyle (Author) / Kelman, Jonathan (Thesis director) / Breetz, Hanna (Committee member) / School of Sustainability (Contributor, Contributor) / Economics Program in CLAS (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Current farming demographics in the United States indicate an aging and overwhelmingly white group of farmers, stimulating the need for engaging a younger and more diverse population. There is an opportunity to engage these populations through farm-based internship and apprenticeship programs, which are immersive programs on small-scale, sustainable farms. These programs are unique in providing hands-on training, housing, meals, and a stipend in return for labor, presenting a pathway to social empowerment. The potential outcomes of increasing diversity and inclusion in farm programs are absent from the research on the benefits of diversity and inclusion in other work environments, such as the corporate setting. This paper presents the results of a study aimed at determining levels of diversity and inclusion in United States farm-based internship programs, and the viability of these programs as an effective opportunity to engage marginalized young people in farming. The study of 13 farm owners and managers across the U.S. found that the participants are focused on fostering education and training, environmental benefits, and a sense of community in their respective programs. All participants either want to establish, or believe they currently have, an inclusive workplace on their farm, but also indicated a barrier to inclusivity in the lack of a diverse applicant pool. Future recommendations for removing that barrier and involving more young, diverse interns include increased outreach and access to these programs, the use of inclusive language, and further research.
ContributorsLascola, Dania (Co-author) / Biel, Braden (Co-author) / Cloutier, Scott (Thesis director) / MacFadyen, Joshua (Committee member) / School of International Letters and Cultures (Contributor) / School of Geographical Sciences and Urban Planning (Contributor) / School of Sustainability (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
College and university campuses can play an important role in a student’s life, and campus outdoor spaces have the ability to positively impact various aspects of student health and well-being. It has long been understood that natural environments can promote health and well being, and in recent years research has begun to examine the impact of parks and landscapes in urban settings on subjective well-being (SWB). Subjective well-being (aka “happiness”) refers to
one’s self-reported measure of well-being and is thought of as having a high level of positive affect, low level of negative affect, and high degree of life satisfaction (Diener, 1984).
This study was conducted to assess the interrelationships between affective experiences, SWB, and usage of campus outdoor spaces in order to learn how outdoor spaces on the Arizona State University (ASU) Tempe campus can be enhanced to increase SWB and usage. In total, 832 students completed a survey questionnaire 1,140 times for six campus outdoor spaces. The results showed that students experience the greatest amount of happiness in the Secret Garden
and James Turrell ASU Skyspace, relaxation/restoration is the affective experience most strongly related to SWB, and SWB is negatively correlated with frequency of visits but positively link with duration of visits. To improve student happiness and usage of outdoor spaces on campuses, planners and designers should work on increasing the relaxing/restorative qualities of existing
locations, creating new spaces for relaxation/restoration around campus, reducing the perception of crowding and noise in large spaces, increasing fun/excitement by adding stimuli and/or opportunities for activity and entertainment, and adding equipment necessary for students to perform the activities they want. In addition to the ASU Tempe campus, the methodology and
findings of this research could be used to improve outdoor spaces on other college and university campuses and other types of outdoor environments.
one’s self-reported measure of well-being and is thought of as having a high level of positive affect, low level of negative affect, and high degree of life satisfaction (Diener, 1984).
This study was conducted to assess the interrelationships between affective experiences, SWB, and usage of campus outdoor spaces in order to learn how outdoor spaces on the Arizona State University (ASU) Tempe campus can be enhanced to increase SWB and usage. In total, 832 students completed a survey questionnaire 1,140 times for six campus outdoor spaces. The results showed that students experience the greatest amount of happiness in the Secret Garden
and James Turrell ASU Skyspace, relaxation/restoration is the affective experience most strongly related to SWB, and SWB is negatively correlated with frequency of visits but positively link with duration of visits. To improve student happiness and usage of outdoor spaces on campuses, planners and designers should work on increasing the relaxing/restorative qualities of existing
locations, creating new spaces for relaxation/restoration around campus, reducing the perception of crowding and noise in large spaces, increasing fun/excitement by adding stimuli and/or opportunities for activity and entertainment, and adding equipment necessary for students to perform the activities they want. In addition to the ASU Tempe campus, the methodology and
findings of this research could be used to improve outdoor spaces on other college and university campuses and other types of outdoor environments.
ContributorsDavis, Kara (Author) / Cheng, Chingwen (Thesis director) / Cloutier, Scott (Committee member) / School of Sustainability (Contributor) / Dean, W.P. Carey School of Business (Contributor) / The Design School (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Membrane-based technology for gas separations is currently at an emerging stage of advancement and adoption for environmental and industrial applications due to its substantial advantages like lower energy and operating costs over the conventional gas separation technologies. Unfortunately, the available polymeric (or organic) membranes suffer a trade-off between permeance and selectivity. Mixed matrix membranes (MMMs) containing two-dimensional (2D) metal-organic frameworks (MOFs) as fillers are a highly sought approach to redress this trade-off given their enhanced gas permeabilities and selectivities compared to the pure polymeric membrane. These MMMs are increasingly gaining attention by researchers due to their unique properties and wide small- and large-scale gas separation applications. However, straightforward and scalable methods for the synthesis of MOFs nanosheets have thus far been persistently elusive. This study reports the single-phase preparation, and characterization of MMMs with 2D MOFs nanosheets as fillers. The prepared MOF and the polymer matrix form the ‘dense’ MMMs which exhibit increased gas diffusion resistance, and thus improved separation abilities. The single-phase approach was more successful than the bi-phase at synthesizing the MOFs. The influence of sonication power and time on the characteristics and performance of the membranes are examined and discussed. Increasing the sonication power from 50% to 100% reduces the pore size. Additionally, the ultimate effect on the selectivity and permeance of the MMMs with different single gases is reported. Analysis of results with various gas mixers indicates further performance improvements in these MMMs could be achieved by increasing sonication time and tuning suitable membrane thicknesses. Reported results reveal that MMMs are excellent candidates for next-generation gas mixture separations, with potential applications in CO2 capture and storage, hydrogen recovery, alkene recovery from alkanes, and natural gas purification.
ContributorsNkuutu, John (Author) / Mu, Bin (Thesis director) / Shan, Bohan (Committee member) / Chemical Engineering Program (Contributor) / School of Sustainability (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
This paper explores Grace Logan and Emma Zuber’s understanding of how edible green spaces are mediums for emotional and social well-being. Our research aims to answer these questions: How are different populations benefitting in terms of their emotional and social well-being in similar and different ways from edible green spaces in Phoenix, Arizona? How does accessibility to garden spaces as well as time, in both frequency and duration, impact personal and communal connection? To answer these questions, we surveyed volunteers from four different garden populations - Sage Garden at Arizona State University (ASU), Desert Marigold School (DMS), TigerMountain Foundation (TMF), and Growhouse Urban Agriculture Center (GUAC). Before the volunteer surveys, we interviewed a garden leader or founder to gain a better understanding of their intentions for the space and their perspective on how the garden impacts emotional and social well-being benefits in their community. The results of the survey included some variance in subpopulation answers but, overall, volunteers answered similarly. This led us to determine that gardens do bring emotional and social benefits to people, but the degree of these benefits prove difficult to truly determine due to the complexity of personal needs across different subpopulations. As well, our research on time and access proved too limited in this study to make a definitive conclusion on how it impacts personal and communal connections, but the research does suggest that time could be a determining factor for subpopulations. This study also made recommendations based on our findings, so that policies could be enacted to ensure people can access green spaces to improve their overall well-being.
ContributorsLogan, Grace Ann (Co-author) / Zuber, Emma (Co-author) / Eakin, Hallie (Thesis director) / Bernier, Andrew (Committee member) / Scott, Cloutier (Committee member) / School of Sustainability (Contributor) / School of Public Affairs (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
Drilling in Section 1002 has been an ongoing debate since the region was designated as a potential area for drilling projects, pending congressional approval in 1980. In 2017, the area was officially opened up for oil and gas development through its passage in the GOP Tax Cuts and Jobs Act of 2017. This act requires 2 lease sales of 400,000 acres, with an allowed 2,000 acre physical footprint (not including pipelines, ice roads, or gravel mines). Using Social-Life Cycle Assessment methodology to assess the process of oil extraction in Section 1002, significant benefits and drawbacks of drilling in this region, with economic, cultural, and social impacts ranging from the local level to the state level to the national level were identified.
Stakeholders impacted by oil development in the Section 1002 region include the Kaktovik community who lives within the Program Area, the Gwich’in people who live south of ANWR, the corporations who will be leasing the land, as well as the employees who will be working on the projects. These stakeholders share similar values and interests, however, when it comes down to the attainment of these values, there are significant differences in opinion. This debate comes down specifically to the desire to ensure stability for one’s family and community, as this means 2 different things to the majority stakeholders on this issue: The Inupiaq and the Gwich’in. The Inupiaq ,who live in Kaktovik specifically ,are particularly keen on the idea of drilling in the Section 1002 region, because the revenues and opportunities that come with the oil and gas development provide access to better standards of living and a more westernized way of life. The Gwich’in, however, value their relationship to the land and the caribou that are at risk of significant change. These 2 groups are critical to the debate, but the state and federal governments have the final say, and a financial incentive to move forward with the lease sales.
Utilizing the S-LCA framework, life cycle impacts of drilling on society are found using indicators that are identified and assessed using both qualitative and quantitative means. Although some conclusions are uncertain due to the forward-looking nature of this S-LCA, the Increasing/Decreasing trends can be identified and confidently attributed to the specific indicators.
Significant Results:
Significant issues this study has highlighted include the resulting impacts, both positive and negative, on the communities affected by oil and gas development in Section 1002. Significant stakeholders include the Kaktovik community, the Gwich’in people, the oil and gas workers in the state of Alaska, and the oil and gas companies themselves. The local residents are the most affected by the impacts of development, with significant issues pertaining to potential for significant lifestyle change, the increased risk of impact on subsistence species, the risks associated with pollution, and the effect on the economy through revenues and job availability.
Stakeholders impacted by oil development in the Section 1002 region include the Kaktovik community who lives within the Program Area, the Gwich’in people who live south of ANWR, the corporations who will be leasing the land, as well as the employees who will be working on the projects. These stakeholders share similar values and interests, however, when it comes down to the attainment of these values, there are significant differences in opinion. This debate comes down specifically to the desire to ensure stability for one’s family and community, as this means 2 different things to the majority stakeholders on this issue: The Inupiaq and the Gwich’in. The Inupiaq ,who live in Kaktovik specifically ,are particularly keen on the idea of drilling in the Section 1002 region, because the revenues and opportunities that come with the oil and gas development provide access to better standards of living and a more westernized way of life. The Gwich’in, however, value their relationship to the land and the caribou that are at risk of significant change. These 2 groups are critical to the debate, but the state and federal governments have the final say, and a financial incentive to move forward with the lease sales.
Utilizing the S-LCA framework, life cycle impacts of drilling on society are found using indicators that are identified and assessed using both qualitative and quantitative means. Although some conclusions are uncertain due to the forward-looking nature of this S-LCA, the Increasing/Decreasing trends can be identified and confidently attributed to the specific indicators.
Significant Results:
Significant issues this study has highlighted include the resulting impacts, both positive and negative, on the communities affected by oil and gas development in Section 1002. Significant stakeholders include the Kaktovik community, the Gwich’in people, the oil and gas workers in the state of Alaska, and the oil and gas companies themselves. The local residents are the most affected by the impacts of development, with significant issues pertaining to potential for significant lifestyle change, the increased risk of impact on subsistence species, the risks associated with pollution, and the effect on the economy through revenues and job availability.
ContributorsJunglas, Hillary L (Author) / Pasqualetti, Martin (Thesis director) / Breetz, Hanna (Committee member) / Department of Supply Chain Management (Contributor) / School of Sustainability (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
The algal fuel industry has existed since the 1980s without fully commercializing a product. Algal fuels are potentially viable replacements for fossil fuels due to their fast cultivation, high oil content, carbon dioxide sequestration during growth, and ability to be grown on non-arable land. For this thesis, six companies from 61 investigated were interviewed about their history with biofuels, technological changes they have gone through, and views for the future of the industry. All companies interviewed have moved away from fuel production largely due to high production costs and have moved primarily toward pharmaceuticals and animal feed production as well as wastewater treatment. While most do not plan to return to the biofuel industry in the near future, a return would likely require additional legislation, increased technological innovation, and coproduction of multiple products.
ContributorsMassey, Alexandria Rae (Author) / Parker, Nathan (Thesis director) / Agusdinata, Buyung (Committee member) / Chemical Engineering Program (Contributor, Contributor) / School of Sustainability (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Background: Cancer impacts the lives of millions of patients, families and caregivers annually
leading to chronic stress, a sense of powerlessness, and decreased autonomy. Social support may improve health empowerment and lead to increased perception of well-being.
Purpose: The purpose of this project was to evaluate the effectiveness of social support provided by a cancer support agency on health empowerment and perceived well-being in adults impacted by cancer.
Conceptual Framework: The Health Empowerment Theory maintains that perceived wellbeing is the desired outcome; mediated by health empowerment through social support, personal growth, and purposeful participation in active goal attainment.
Methods: Twelve adults impacted by cancer agreed to complete online questionnaires at
baseline and at 12 weeks after beginning participation in social support programs provided by a cancer support agency.
Instruments included: Patient Empowerment Scale, The Short Warwick-Edinburgh Mental Well-Being Scale (SWEMWBS), and The Office of National Statistics (ONS) Subjective Well-Being Questions.
Results: Four participants completed pre and post surveys. An increase was seen in
empowerment scores (pre M = 1.78, SD = 0.35 and post M = 3.05, SD = 0.42). There was no
increase in perceived well-being: SWEMWBS pre (M= 3.71, SD= 0.76), post (M= 3.57, SD=
0.65); ONS pre (M= 7.69, SD= 1.36), post (M= 6.59, SD= 1.52).
Implications: The data showed an increase in health empowerment scores after utilizing social support programs, lending support to the agency’s support strategies. It is recommended that the measures be included in surveys routinely conducted by the agency to continue to assess the impact of programming on health empowerment, and perceived well-being.
leading to chronic stress, a sense of powerlessness, and decreased autonomy. Social support may improve health empowerment and lead to increased perception of well-being.
Purpose: The purpose of this project was to evaluate the effectiveness of social support provided by a cancer support agency on health empowerment and perceived well-being in adults impacted by cancer.
Conceptual Framework: The Health Empowerment Theory maintains that perceived wellbeing is the desired outcome; mediated by health empowerment through social support, personal growth, and purposeful participation in active goal attainment.
Methods: Twelve adults impacted by cancer agreed to complete online questionnaires at
baseline and at 12 weeks after beginning participation in social support programs provided by a cancer support agency.
Instruments included: Patient Empowerment Scale, The Short Warwick-Edinburgh Mental Well-Being Scale (SWEMWBS), and The Office of National Statistics (ONS) Subjective Well-Being Questions.
Results: Four participants completed pre and post surveys. An increase was seen in
empowerment scores (pre M = 1.78, SD = 0.35 and post M = 3.05, SD = 0.42). There was no
increase in perceived well-being: SWEMWBS pre (M= 3.71, SD= 0.76), post (M= 3.57, SD=
0.65); ONS pre (M= 7.69, SD= 1.36), post (M= 6.59, SD= 1.52).
Implications: The data showed an increase in health empowerment scores after utilizing social support programs, lending support to the agency’s support strategies. It is recommended that the measures be included in surveys routinely conducted by the agency to continue to assess the impact of programming on health empowerment, and perceived well-being.
ContributorsO'Rourke, Suzanne (Author) / Velasquez, Donna (Thesis advisor)
Created2017-05-03