Bio


I study the role of hydrocarbon fuels in a rapidly decarbonizing economy. I'm a "pick important problems first and figure out the best methods later" kind of researcher, drawing on my expertise in techno-economic assessment, machine learning and applied statistics, econometrics, optimization, and various engineering subdisciplines along the way. My current focus is assessing and demonstrating the value of diverse methane emission sensing and mitigation technologies across the oil and gas value chain in an increasingly data-rich environment.

Honors & Awards


  • Graduate Research Fellow, National Science Foundation (2014-2018)

Boards, Advisory Committees, Professional Organizations


  • Founder and Chair, Methane Emissions Technology Alliance (2019 - Present)
  • Programs Chair, Climate Change AI (2020 - Present)

Professional Education


  • Ph.D., Carnegie Mellon University, Engineering and Public Policy (2019)
  • M.S., Carnegie Mellon University, Machine Learning (2018)
  • Bachelor of Arts, University of California Berkeley (2011)

Stanford Advisors


All Publications


  • Electrofuel Synthesis from Variable Renewable Electricity: An Optimization-Based Techno-Economic Analysis. Environmental science & technology Sherwin, E. D. 2021

    Abstract

    Sectors such as aviation may require low-carbon liquid fuels to dramatically reduce emissions. This analysis characterizes the economic viability of electrofuels, synthesized from CO2 from direct air capture (DAC) and hydrogen from electrolysis of water, powered primarily by solar or wind electricity. This optimization-based techno-economic analysis suggests that using today's technology, hydrocarbon electrofuels would cost upward of $4/liter of gasoline equivalent (lge), potentially falling to $1.7-1.8/lge in the next decade and <$1/lge by 2050. Only in the latter case are electrofuels potentially less costly than using petroleum fuels offset with DAC with sequestration. Achieving low-end electrofuel costs is contingent on substantial reductions in the capital cost of DAC, electrolyzers, and renewable electricity generation. However, the system also requires sufficient operational flexibility to efficiently power this capital-intensive equipment on variable electricity. Such forms of flexibility include various types of storage, supplementary natural gas and grid electricity interconnections (penalized with a steep carbon price), curtailment, and the ability to modestly adjust fuel synthesis and DAC operating levels over time scales of several hours to days.

    View details for DOI 10.1021/acs.est.0c07955

    View details for PubMedID 33983018

  • Estimating global oilfield-specific flaring with uncertainty using a detailed geographic database of oil and gas fields ENVIRONMENTAL RESEARCH LETTERS Zhang, Z., Sherwin, E. D., Brandt, A. R. 2021; 16 (12)
  • Displacing fishmeal with protein derived from stranded methane NATURE SUSTAINABILITY El Abbadi, S. H., Sherwin, E. D., Brandt, A. R., Luby, S. P., Criddle, C. S. 2021
  • Closing the methane gap in US oil and natural gas production emissions inventories. Nature communications Rutherford, J. S., Sherwin, E. D., Ravikumar, A. P., Heath, G. A., Englander, J., Cooley, D., Lyon, D., Omara, M., Langfitt, Q., Brandt, A. R. 2021; 12 (1): 4715

    Abstract

    Methane (CH4) emissions from oil and natural gas (O&NG) systems are an important contributor to greenhouse gas emissions. In the United States, recent synthesis studies of field measurements of CH4 emissions at different spatial scales are ~1.5-2* greater compared to official greenhouse gas inventory (GHGI) estimates, with the production-segment as the dominant contributor to this divergence. Based on an updated synthesis of measurements from component-level field studies, we develop a new inventory-based model for CH4 emissions, for the production-segment only, that agrees within error with recent syntheses of site-level field studies and allows for isolation of equipment-level contributions. We find that unintentional emissions from liquid storage tanks and other equipment leaks are the largest contributors to divergence with the GHGI. If our proposed method were adopted in the United States and other jurisdictions, inventory estimates could better guide CH4 mitigation policy priorities.

    View details for DOI 10.1038/s41467-021-25017-4

    View details for PubMedID 34354066

  • Single-blind test of airplane-based hyperspectral methane detection via controlled releases ELEMENTA-SCIENCE OF THE ANTHROPOCENE Sherwin, E. D., Chen, Y., Ravikumar, A. P., Brandt, A. R. 2021; 9 (1)
  • Characterizing the association between low-income electric subsidies and the intra-day timing of electricity consumption ENVIRONMENTAL RESEARCH LETTERS Sherwin, E. D., Azevedo, I. L. 2020; 15 (9)
  • Estimation of the year-on-year volatility and the unpredictability of the United States energy system NATURE ENERGY Sherwin, E. D., Henrion, M., Azevedo, I. L. 2018; 3 (4): 341–46