Environmental Valuation & Cost-Benefit News
Steam cracking and methane to olefins: Energy use, CO2 emissions and production costs
03/17/08
10:58:53 am, by damageva 
, 229 words, 180 views 
Categories: Energy, Climate Change GHG Carbon CO2, Europe, Academic Study/Journal Article, Costs and Benefits
Steam cracking and methane to olefins: Energy use, CO2 emissions and production costs
Abstract: While most olefins (e.g., ethylene and propylene) are currently produced through steam cracking routes, they can also possibly be produced from natural gas (i.e., methane) via methanol and oxidative coupling routes. We reviewed recent data in the literature and then compared the energy use, CO2 emissions and production costs of methane-based routes with those of steam cracking routes. We found that methane-based routes use more than twice as much process energy than state-of-the-art steam cracking routes do (the energy content of products is excluded). The methane-based routes can be economically attractive in remote, gas-rich regions where natural gas is available at low prices. The development of liquefied natural gas (LNG) may increase the prices of natural gas in these locations. Oxidative coupling routes are currently still immature due to low ethylene yields and other problems. While several possibilities for energy efficiency improvement do exist, none of the natural gas-based routes is likely to become more energy efficient or to lead to less CO2 emissions than steam cracking routes do.
Keywords: Natural gas; Ethylene; Steam cracking; Energy efficiency; Methanol
by Tao Ren, Martin K. Patel and Kornelis Blok; all of Department of Science, Technology and Society, Faculty of Chemistry, Utrecht University, Heidelberglaan 2, 3584 CS Utrecht, The Netherlands; Tel.: +31 30 243 7336; fax: +31 30 253 7601.
Energy via Elsevier Science Direct www.ScienceDirect.com
Volume 33, Issue 5, May 2008, Pages 817-833
http://dx.doi.org/10.1016/j.energy.2008.01.002
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