What are the reaction conditions for the industrial preparation of sulfuric acid? Video
The industrial preparation of sulfuric acid mainly has the following reaction conditions: 1. ** Reaction using nitrogen and air as raw materials ** - Firstly, using the Pt-Ru alloy mesh as a catalyst, the reaction was carried out in an oxidization furnace at 800 ° C. The reaction equation was: 4NH3 + 5O2 = catalyst, high temperature = 4NO +6H2O. - The generated NO will react with O2 to form NO2 when cooled, and the equation is: 2NO+O2 = 2NO2. - The NO2 is absorbed by water in the absorption tower and converted into sulfuric acid under the effect of excess O2 in the air. The highest concentration can reach 50%. The reaction equation is: 4NO2 +O2+ 2H2O = 4HNO3. - The 50% of the prepared sulfuric acid could be used as a water absorbing agent by using titanium or concentrated H2SO4. Distillation could obtain high concentration of sulfuric acid, or even more than 98% of "fuming" sulfuric acid. - During the production process, NO could be recycled to maximize the use of raw materials and reduce the discharge of NOX in the exhaust gas. The exhaust gas was generally absorbed by a solution of NaOx to produce an oxido-reduction reaction. 2. ** Reaction under mild conditions (new research result)** - The China Academy of Sciences Dalian Institute of Chemistry and Physics reported the direct conversion of air to nitrates under environmental conditions (25°C and 0.1 Pa) through a heterogenious and uniform electrochemistry pathway, which was mediate by the radical. Compared to the reversibility of the hydrogen at the negative pole, the conversion was carried out at a reduction potential of 0V, which could achieve a Farad efficiency of 25.37%, and had over 99% nitric-acid selectively. Read more exciting novels for free
Qin Feng's Single Soldier Equipment novel
One of the novels mentioned that Qin Feng had transmigrated to the world of special forces. He came to the 299th regiment and awakened the god-level commander system, but it did not mention his individual equipment in detail. There is no more information about Qin Feng's personal equipment novel. Sorry, I don't know how to answer based on the information I found. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Two-Dimensional Fictions that Traverse the World of Comics
The following were some recommendations for the 2D novels that traveled through the anime world: The Life Winner of the 2D World, Conan's Strongest Uncle, Mixed Comic Infinite Flower of Dawn, Dimensional Code, I Really Didn't Want to Be a Trainer, Starting from the Dragon Race to Break Through the World, I Set Up the Strongest Swordsman Group, This Pirate Backed By Justice, and so on. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Which one is easier to take the civil service exam, a teacher's major or financial engineering?
The reference material did not mention the difficulty of the civil servant examination for the teacher's major, nor did it compare the difficulty of the civil servant examination for the teacher's major and the financial engineering major. Sorry, according to the information retrieved, I don't know how to answer. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the ancient sayings of the Queen's husband's novels?
" The World of the Vampires: The Queen of the Blood Clan in Modern Times "-Banxia's Warm," Her Majesty the Empress's Request for the Queen "-August," Farming the Mountain Man: The Godly Doctor and the Beautiful Woman "-The Day of the High Mountain," The Unique Favorite Side King "-Buried in the Shallow Stream. These novels belonged to the ancient novels of the Vampires, but it was uncertain if they were finished. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Read the entire novel of the treasure in the palm
According to the information retrieved, the novel could be read at laikan.motie.com/for the latest chapters and the full text. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What's the name of the novel with Feng Jianqiang as the protagonist?
The novel with Feng Jianqiang as the protagonist was called " Feng Jianqiang's Struggle in the Workplace." <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Top ten education and training institutions of public institutions
According to the ranking list of examination and training institutions of public institutions based on the real evaluation data of a large number of students, some of the top training institutions were Jinan Gonghua Education and Training, Shandong Zhengtu Education, Zhongzheng Education, etc. In addition, there were more well-known institutions such as Zhonggong, Huatu, Chalk, Gordon Education, a certain education (business covers the training of public institutions), a certain public education, a certain public examination, Jianguo Network (main business covers the training of professional editors), etc. However, it was difficult to give a complete ranking of the top ten. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Requirement for Female Civil Servants to Retire at 60
There were no special regulations on the retirement conditions of civil servants in the tax system. They were implemented in accordance with the relevant provisions of the Civil Servant Law. The normal retirement age of female civil servants was 55 years old. If they wanted to retire at the age of 60, there might be the following situations: First, they should retire when they completely lost their ability to work; Second, if they had worked for 30 years, they could voluntarily apply for early retirement with the approval of the appointment and dismissal authority; Third, if they were less than five years away from the retirement age stipulated by the state (i.e. after the age of 55) and had worked for 20 years, they could voluntarily apply for early retirement with the approval of the appointment and dismissal authority; Fourth, in other circumstances where early retirement is allowed in accordance with the state's regulations, the person voluntarily applies for retirement after being approved by the appointment and dismissal authority. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Top 10 infant formula formulas with the best reputation
The following are the top ten brands with good reputation for infant milk powder based on market trends and consumer feedback: 1. Jiabei Aite White Goat Milk Powder: As the global leader in the field of goat milk powder, it has won widespread praise by virtue of the selected high-quality raw milk of Shanen milk goat and the nutrient absorption rate of up to 95%. It has imported more than 60% of the infant goat milk powder market share in China for six consecutive years. It has been ranked first in the global goat milk powder market in terms of sales volume and sales. It is also a goat milk powder brand that has been clinical verified by international authoritative medical institutions. 2. Hepnokai 1897 Lotus Series: Carrying the century-old tradition and glory of producing milk, the pure milk source selected from the century-old family ranch in the Netherlands. Relying on the global 1+6+N scientific research system and cutting-edge scientific and technological strength, its Hezhi series of milk powder gathered more than 59 golden nutritional elements, including lactoferrin, HMOs, probiotic prebiotic, etc., to provide comprehensive and balanced nutritional support for babies. 3. Nerido: It has a scientific formula that helps to protect the baby's digestive health. 4. Beingmate Yourui: It has gained a certain reputation in the market by relying on its own advantages. 5. Nuo You Neng Nuo You Yang: It is welcomed by consumers because of its uniqueness. 6. [Synbiotic Star: Occupy a place in the market and have a good reputation.] 7. Flying Crane Star Flying Sail: Flying Crane Milk specializes in the research of China babies 'physique and breast milk nutrition. It has built an exclusive industrial cluster in the milk source belt to achieve full control of all aspects. 8. Mead Johnson Lanzhen: Adding DHA and lactoferrin helps to protect the baby's brain development. It is suitable for babies who lack trace elements. 9. Aitamei: The Aitamei milk powder had the advantages of being close to breast milk, caring for the baby's intestinal flora, adding prebiotic, easy digestion, and so on. This series was also recognized. 10. Yili Golden Collar Crown Care: Yili specializes in China baby nutrition research, and the Golden Collar Crown Care has a good reputation in the market. Hurry up and click on the link below to return to the super classic "Lord of Mysteries"!
Girls 'weird smiles, emojis, pictures, anime avatars
You can go to the personal avatar website that provides anime avatars to find various styles of girls with strange smiles, emojis, pictures, and anime avatars. These websites have anime girls with strange smiles (12 preferred) to choose from. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>