13. In 2019 an estimated 85 billion cubic feet of natural gas was consumed in the United States. Assume complete combustion to stable gas species and the composition of the natural gas is equivalent to that of the East Ohio Natural Gas, given in Table 17.12 of the textbook. a. Estimate the reduction of CO2 in kilograms in 2019 if 10% by volume of all natural gas were replaced by H2 generated by renewable energy. b. How does the energy density of the gas change with 10 vol\% hydrogen? c. How many gallons of water would be required to generate this amount of hydrogen from electrolysis? Copyright 0 MoGraw Hil LLC. All rights reserved. No reproduction or distribution without the prior written consent of MoGraw Hil LLC. Table 17.12 Composition (mol\%) and properties of natural gas from sources in the United States [28] "Although not explicitly stated in Ret. [28], these gases appear to be pipeline gases. "Also contains 0.01%H2 and 0.01%O2, 'At 1atm and 15.6C(60F). Higher heating values for 1 atm and 15.6C(60F) [28], SOURCE: Reed, R. J., North American Combustion Handbook, 3rd Ed., vol. 1. Cleveland, OH: North American Manufacturing Co. 1986. 13. In 2019 an estimated 85 billion cubic feet of natural gas was consumed in the United States. Assume complete combustion to stable gas species and the composition of the natural gas is equivalent to that of the East Ohio Natural Gas, given in Table 17.12 of the textbook. a. Estimate the reduction of CO2 in kilograms in 2019 if 10% by volume of all natural gas were replaced by H2 generated by renewable energy. b. How does the energy density of the gas change with 10 vol\% hydrogen? c. How many gallons of water would be required to generate this amount of hydrogen from electrolysis? Copyright 0 MoGraw Hil LLC. All rights reserved. No reproduction or distribution without the prior written consent of MoGraw Hil LLC. Table 17.12 Composition (mol\%) and properties of natural gas from sources in the United States [28] "Although not explicitly stated in Ret. [28], these gases appear to be pipeline gases. "Also contains 0.01%H2 and 0.01%O2, 'At 1atm and 15.6C(60F). Higher heating values for 1 atm and 15.6C(60F) [28], SOURCE: Reed, R. J., North American Combustion Handbook, 3rd Ed., vol. 1. Cleveland, OH: North American Manufacturing Co. 1986