1. B. Yousaf, G. Liu, Q. Abbas, R. Wang, M. U. Ali, H. Ullah, R. Liu, and C. Zhou, Applied Energy
208, 142 (2017).
2. Renewables 2011—Global Status Report, REN21, Secretariat Paris, France, ISSN 143792140X (2011).
3. U.S. Department of Energy, Energy Information Administration, Office of Integrated and International Energy Analysis, Annual Energy Outlook 2018 with Projections to 2050, Washington, DC, February 2018,
https://www.eia.gov/outlooks/aeo/pdf/AEO2018.pdf
.
4. L. L. Baxter, T. R. Miles, T. R. Miles Jr., B. R. Jenkins, T. Milne, D. Dayton, R. W. Bryers, and L. L. Oden, Fuel Processing Technology
54, 47 (1998).
5. P. Vainikka, D. Bankiewicz, A. Frantsi, J. Silvennoinen, J. Hannula, P. Yrjas, and M. Hupa, Fuel
90, 2055 (2011).