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Aerojet S-405 is a spontaneous catalyst, that is, hydrazine decomposes on contact with the catalyst. The decomposition is highly exothermic and produces a 1,000 °C (1,830 °F) gas that is a mixture of nitrogen, hydrogen and ammonia. The main limiting factor of the monopropellant rocket is its life, which mainly depends on the life of the catalyst.
Tencent QQ (Chinese: 腾讯QQ), also known as QQ, is an instant messaging software service and web portal developed by the Chinese technology company Tencent. QQ offers services that provide online social games, music, shopping, microblogging, movies, and group and voice chat software. As of March 2023, there were 597 million monthly active QQ ...
The Cisco Catalyst 4500 Series is a mid-range modular chassis network switch. The system comprises a chassis, power supplies, one or two supervisors, line cards and service modules. The Series includes the E-Series chassis and the Classic chassis which is manufactured in four sizes: ten-, seven-, six-, and three-slot.
NetEase Cloud Music (Chinese: 网易云音乐) is a Chinese freemium music streaming service developed and owned by NetEase, Inc. The streaming service was launched to the public on 23 April 2013. In April 2017 it received its series A financing of 750 million CNY (US$107 million), and was valued at 8 billion CNY (US$1.14 billion). [1]
Purpose and function of a NOx adsorber. A NOx adsorber is designed to reduce oxides of nitrogen emitted in the exhaust gas of a lean burn internal combustion engine. Lean burn engines, particularly diesels, present a special challenge to emission control system designers because of the relatively high levels of O 2 (atmospheric oxygen) in the ...
The General Electric Catalyst (formerly Advanced Turboprop, or ATP) is a turboprop engine by GE Aerospace. It was announced on 16 November 2015 and will power the Beechcraft Denali, it first ran on December 22, 2017, and should be certified in 2024. The 850 to 1,600 hp (630 to 1,190 kW) engine aims for 20% better efficiency than its competition ...
Lewis acid catalysis. In Lewis acid catalysis of organic reactions, a metal-based Lewis acid acts as an electron pair acceptor to increase the reactivity of a substrate. Common Lewis acid catalysts are based on main group metals such as aluminum, boron, silicon, and tin, as well as many early (titanium, zirconium) and late (iron, copper, zinc ...
Germany introduced the first the GNSS road pricing system for truck tolling in 2005 . In 2007, the Netherlands legislated the implementation of GNSS road pricing by 2011, and nationwide by 2016. However, the project was declared controversial and subsequently put on indefinite hold due to the Dutch government collapse on February 20, 2010. [ 4 ]