Yongjun Gao, Liu Jingbo L, Bashir Sajid
Center for Clean Energy and Energy Conservation and Environmental Protection, Zhejiang Yangtze River Delta, 1359-3 Wangjun International 22, Yuhang District, Hangzhou, PRC 310000, China.
Sunshine Times Law Firm, 1359-3 Gu Dun St., Hangzhou, PRC 310000, China.
Catal Today. 2021 Aug 15;374:135-153. doi: 10.1016/j.cattod.2020.10.004. Epub 2020 Oct 17.
A unified treatment of the renewable portfolio standards is given concerning direct methanol fuel. The current mechanism of electrocatalysis of methanol oxidation on platinum and non-platinum-containing alloys is summarized for the systematic improvement of the rate of electro-oxidation of methanol are discussed. Policy realignment under the five-year plan is discussed in length to demonstrate how policy, markets, and engineering designs contribute towards the development of model direct methanol fuel cells operational enhancement, and factors that affect critical performance parameters for commercial exploitation are summarized for catalytic formulations and cell design within the context of why this investment in technology, education, and finances is required within the global context of sustainable energy and energy independence as exposed by thirteenth the five-year plan. The prolog focuses on the way, whereas the section on methanol fuel cells on the how and the post log on what is expected post-COVID-19 era in science and technology as China pivots to a post-fossil fuel economy. China's industrial growth has been through internal market reforms and supplies side economics from the Chinese markets for fossil fuels except for petroleum. The latest renewable portfolio standards adopted have common elements as adopted from North American and the United Kingdom in terms of adaptation of obligation in terms of renewable portfolio standards as well as a realization that the necessity for renewables standards for the thirteen five year plan (from 2016 to 2020) need to less rigorously implemented due to performance targets that were met during the eleventh (06-10) and twelfth five-year plans (11-15) in terms of utilization of small coal-ire power plants, development of newer standards, led to an improvement of energy efficiency of 15 %, reduction of SO/NO by an average of 90 % and PM2.5 by 96 % over the last two five-year plans. The current phase of the plan has a focus on energy generation from coal and a slowing down of renewables or Renewable energy curtailment of approximately 400 T Wh renewables including 300 T Wh of non-hydro power, principally from Guangdong, and Jiangsu for transfer of hydropower and Zhejiang, Tianjin, Henan for non-hydro power transfer with Beijing and Shanghai playing important roles in renewables energy curtailment and realignment using an integrated approach to optimize each provinces energy portfolio. The realignment of the renewable energy portfolio indicates that the newly installed capacity in Sichuan, Yunnan, Inner Mongolia, and Zhejiang will account for less than 20 % of the current renewable energy portfolio but with the NO SO and PM savings already accrued. The catalytic reduction of carbon dioxide to methanol (70 / 110 million metric tons from all sources in 2019 for China/world) is one technological approach to reduce global carbon dioxide emissions and suggests that catalytic methanol synthesis by CO hydrogenation may be a plausible approach, even if it is more expensive economically than methanol synthesis by the syngas approach. This is because the CO emissions of the synthesis are lower than other synthesis methodologies. The Chinese government has placed a premium on cleaner air and water and may view such an approach as solving the dual issues of fuel substitution and reduction of CO. Thus, the coupling of hydrogen generation from sustainable energies sources (Solar 175 / 509 GW) or wind (211/591.5 GW in 2019) may be an attractive approach, as this requires slightly less water than coal gasification. Due to the thermodynamic requirement of lower operating pressure and higher operating pressure, currently, there is no single operational approach, although some practice approaches (220 °C at 48 atm using copper) and zinc oxide/alumina are suggested for optimal performance.
本文针对直接甲醇燃料给出了可再生能源组合标准的统一处理方法。总结了目前铂和不含铂合金上甲醇氧化的电催化机制,以系统地提高甲醇电氧化速率,并讨论了如何实现这一目标。详细讨论了五年计划下的政策调整,以说明政策、市场和工程设计如何推动直接甲醇燃料电池的发展、运行性能的提升,并总结了影响商业开发关键性能参数的因素,包括催化配方和电池设计。这是在第十三个五年计划所揭示的全球可持续能源和能源独立背景下,探讨为何需要在技术、教育和资金方面进行投资。引言部分关注方式,甲醇燃料电池部分关注方法,结语部分则关注后新冠疫情时代中国向化石燃料后经济转型过程中科技领域的预期。中国的工业增长经历了国内市场改革和除石油外的化石燃料市场供应侧经济。最新采用的可再生能源组合标准与北美和英国采用的标准有共同要素,包括在可再生能源组合标准方面的义务调整,以及认识到由于在第十一个(2006 - 2010年)和第十二个五年计划(2011 - 2015年)期间通过利用小型煤电厂实现了性能目标,因此第十三个五年计划(2016 - 2020年)的可再生能源标准实施力度可适当降低。在过去两个五年计划中,这带来了能源效率提高15%、二氧化硫/氮氧化物平均减少90%以及细颗粒物减少96%。当前计划阶段侧重于煤炭发电,可再生能源发展放缓或可再生能源削减约400太瓦时,其中包括300太瓦时非水电,主要来自广东和江苏的水电输送以及浙江、天津、河南的非水电输送,北京和上海在可再生能源削减和调整中发挥重要作用,采用综合方法优化各省能源组合。可再生能源组合的调整表明,四川、云南、内蒙古和浙江的新增装机容量将占当前可再生能源组合的比例不到20%,但已实现了氮氧化物、二氧化硫和细颗粒物的减排。将二氧化碳催化还原为甲醇(2019年中国/全球所有来源为70/1.1亿吨)是减少全球二氧化碳排放的一种技术途径,这表明通过一氧化碳加氢催化合成甲醇可能是一种可行的方法,尽管从经济角度看它比合成气法合成甲醇更昂贵。这是因为该合成方法的一氧化碳排放量低于其他合成方法。中国政府高度重视空气和水的清洁,可能会将这种方法视为解决燃料替代和一氧化碳减排双重问题的途径。因此,将可持续能源(2019年太阳能为175/509吉瓦)或风能(2019年为211/591.5吉瓦)制氢相结合可能是一种有吸引力的方法,因为这比煤气化所需的水略少。由于热力学要求较低和较高运行压力,目前尚无单一的操作方法,不过有人建议采用一些实践方法(如在48个大气压、220°C下使用铜)以及氧化锌/氧化铝以实现最佳性能。