removing hydrogen groups

Removal of Hydrogen Sulfide from Groundwater Using …

2008-9-30 · for removing hydrogen sulfide was proposed (Thompson and McGarvey, 1953), but limit-ed information on the use of anion exchange for groundwater treatment has been report-ed. This article will assess the feasibility of using bed-packed anion exchange for remov-ing hydrogen sulfide from groundwater. Hydrogen sulfide is not directly regulat-

Lecture notes – The carbon and hydrogen atoms groups ...

Lecture notes – The carbon and hydrogen atoms groups This is illustrated by looking at the structure of the propane, 2-methyl propane and butane molecules. Follow the sequence of bullet points down, and then back uthe relationship between all the structural and formula styles. p, so you are quite clear on

Effect of surface oxygen/nitrogen groups on hydrogen ...

2015-10-7 · The removal efficiency of HCl was improved slightly by H 2 O 2 modification due to the increase of carbon–oxygen groups, and significantly by HNO 3 and Cu(NO 3) 2 treatments because of newly formed nitrogen–oxygen groups. Nitroso and nitro groups show significant promotion of HCl retention ability over the ACFs surface.

Alkyl Groups and the Symbol R Alkyl groups are obtained …

Alkyl Groups and the Symbol R Alkyl groups are obtained by removing a hydrogen from an alkane. Often more than one alkyl group can be obtained from an alkane by removal of different kinds of hydrogens. Figure 8 depicts the simple parent alkanes, group names and abbreviations for alkyl moieties derived from the parent alkanes Figure 8: Example ...

Study on removal of gaseous hydrogen sulfide based on ...

2020-1-1 · Thermal regeneration of spent biochars was performed at 200 °C during 1 h under air atmosphere. Then, the H 2 S removal performance of regenerated biochars was measured. As shown in Fig. 13, the H 2 S removal capacity decreases by 40% (from 5.80 to 3.45 mg/g) for S800, and 60% (from 0.58 to 0.23 mg/g) for E800 after two times regeneration.

Biogas upgrading Evaluation of methods for H S removal

S removal. Hydrogen sulfide can be removed either in the digester, from the crude biogas, or in the upgrading process. In general, H 2 S removal methods can be classified in two big groups according to their principle: the physical-chemicals, which are the traditional ones and currently still dominate the market, and the biotechnological.

US7288201B2

A composition comprising a magnesium halide coated macroporous carbonaceous substrate is provided for effecting moisture removal from a hydrogen halide fluid. Moisture removal is effected by intimately contacting the hydrogen halide fluid with the magnesium halide coated macroporous carbonaceous substrate and separating the fluid from the coated substrate.

Alkyl Group

Removing a hydrogen atom from the tertiary carbon atom of isobutane gives a tertiary alkyl group called the tert-butyl (t-butyl) group. Thus, there are four isomeric C 4 H 9 alkyl groups. Alkyl groups are named by an IUPAC procedure similar to that used to name alkanes with the longest continuous chain beginning at the branch point.

Catalytic and environmentally friendly removal of …

2017-10-30 · Removal of hydrogen sulfide as one of the most dangerous pollutants in molten sulfur has been studied here. In fact, catalytic degassing of Claus-derived molten sulfur containing about 150–200 ppmw of dissolved hydrogen sulfide and hydrogen polysulfide was performed over silica and nanosilica catalytic extrudates to reduce the hydrogen sulfide content up to environmental standard levels. In ...

Methods for Removing the Fmoc Group | SpringerLink

During solid-phase peptide synthesis (SPPS), the Fmoc group is removed typically with piperidine, which in turn scavenges the liberated dibenzofulvene to form a fulvene …

Minimizing hydrogen vacancies to enable highly efficient ...

2021-4-29 · V H (N) (a hydrogen vacancy resulting from removing hydrogen from a nitrogen atom) acts as an efficient non-radiative recombination centre in MAPbI 3 with an extremely high capture coefficient of ...

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Enhanced surface hydroxyl groups by using hydrogen ...

2020-5-1 · Enhanced surface hydroxyl groups by using hydrogen peroxide on hollow tubular alumina for removing fluoride. ... The hollow tubular structure was designed to investigate the performance of removing fluoride. • Hydrogen peroxide was applied to improve the density of hydroxide radicals. ...

Non-hydrogen processes for simultaneous desulfurization ...

2021-9-22 · While the removal of quinoline was proposed to occur through Lewis acid-base interaction, removal of carbazole, DBT and DBTO 2 were proposed to be governed by polarity compatibility of the target compounds and hydrogen bond donor groups available in the DESs (Li et al. 2018). In the case of quinoline removal, quinoline being a lewis base, was ...

The First Step in Amino Acid Degradation Is the Removal …

What is the fate of amino acids released on protein digestion or turnover? Any not needed as building blocks are degraded to specific compounds. The major site of amino acid degradation in mammals is the liver. The amino group must be removed, inasmuch as there are no nitrogenous compounds in energy-transduction pathways. The α-ketoacids that result from the deamination of amino acids are ...

Structural manipulation through selective substitution of ...

The effect of removing hydrogen bond donors through the substitution of NH hydrogen atoms by alkyl groups on the supramolecular structure of the products is assessed. You have access to this article

IUPAC

2014-2-24 · Univalent groups formed by removing a hydrogen atom from a @[email protected], e.g. ethyl, phenyl. See: heterocyclyl, organoheteryl, organyl groups. Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1341 . Cite as: ...

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2013-9-13 · Branched alkyl groups On page 40, it was shown that straight-chain alkyl (n-alkyl) groups are formed by removal of a terminal (end) hydrogen atom from straight-chain alkanes. It is also possible to generate a large number of branched alkyl groups by removing …

Removing hydrogen sulfide from a feed stream using ...

2020-11-1 · A series of materials, including sand (S) silica blue (SB), iron-exchanged sand (IES), zeolite 13X (Z), iron-exchanged zeolites (IEZ), and the waste material acid mine drainage sludge (AMDS), were used as adsorbents for the removal of hydrogen sulfide (H 2 S) from a feed stream in a pilot (bench)-scale study. Artificially polluted H 2 S gas streams were created using a gas cylinder with 10,000 ...

Hydrochloric Acid – Chemical production and investment ...

2021-10-9 · Process Economics Program Report 134. Published November 1979. In this report, processes for producing, recovering and purifying hydrochloric acid and its anhydrous form, hydrogen chloride, are studied. The processes for producing hydrogen chloride include the following routes: Reaction of chlorine and hydrogen; Reaction of alkali chloride ...

Removing a hydrogen from an alkane gives an atomic | …

Question: Removing a hydrogen from an alkane gives an atomic grouping with a free valence known as the alkyl group. An alkane will give rise to as many alkyl groups as there are non-equivalent hydrogens. Exercise: Build models or drawings for methane, ethane, n-butane, isobutane, and propane. Determine how many different alkyl groups each can form.

BLEACHING WITH GREEN OXIDATION CHEMISTRY

2021-5-28 · oxygen or removing hydrogen atoms. Therefore, the oxidized compound cannot contain organo-chlorine type pollutants, and the problem of hazardous pollution is prevented at the source. Challenges for Peroxide Bleaching The challenge of replacing traditional bleaching agents with hydrogen peroxide is twofold.

Enhanced surface hydroxyl groups by using hydrogen ...

Enhanced surface hydroxyl groups by using hydrogen peroxide on hollow tubular alumina for removing fluoride. Author links open overlay panel Lei Huang a b Zhihui Yang a b Zhuanxia Zhang a Linfeng Jin a Weichun Yang a b Yingjie He a Lili Ren a Haiying Wang a b. Show more. Share. Cite.

Functional Group Names, Properties, and Reactions ...

Functional Groups and Reactivity. Functional groups play a significant role in directing and controlling organic reactions. Alkyl chains are often nonreactive, and the direction of site-specific reactions is difficult; unsaturated alkyl chains with the presence of …

Oxidation and Reduction

Last time we saw how a nucleophilic addition of a carbon atom to the carbonyl carbon could be carried out through the use of a Grignard reagent. This time we''ll look at oxidations and reductions of carbonyl groups and at the acidity of the alpha hydrogen …

Branched chain alkyl groups are obtained by removing one ...

Branched chain alkyl groups are obtained by removing one hydrogen atom from a carbon atom within an open chain alkane or from a carbon atom at the end of a branched chain alkane. 3.2.5. IUPAC naming of branched chain alkyl group. 1. Identify the longest C-C chain 2. Start numbering from the carbon atom from which H atom was removed and continue numbering along the longest C-C chain.